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0xGuard is a specialised Web3 security company offering smart contract audits tailored to various project needs. Their pricing starts at $900 for a Simple Plan, with more comprehensive Standard and Pro Plans available from approximately $5,799 and $8,390 respectively. Each plan combines automated vulnerability scanning with manual review by experienced auditors, delivering detailed reports and actionable recommendations. They also offer a 30% discount for newer projects with smaller communities to encourage wider adoption of security best practices.

The company supports a broad range of programming languages used across major blockchain platforms. These include Solidity for Ethereum and other EVM-compatible chains, Rust and C for Solana smart contracts, and Move for the Sui blockchain. Additionally, 0xGuard audits contracts written in FunC, Fift, and C++ for The Open Network (TON), demonstrating their versatility in securing diverse blockchain ecosystems.

By combining technical expertise with thorough audit processes, 0xGuard helps projects identify and resolve vulnerabilities before deployment, ensuring stronger security and trust within the decentralised ecosystem. Their services are designed to support developers throughout the smart contract lifecycle, from development through ongoing monitoring and risk mitigation.

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0xTeam is a dedicated Web3 security auditing firm specialising in protecting blockchain projects across multiple chains such as Ethereum, BNB Chain, and Solana. They have completed over 132 audits, securing more than $2.3 billion in value for their clients. Their expertise covers smart contracts, tokens, NFTs, and DeFi platforms, helping projects identify and fix vulnerabilities before they can be exploited.

They pride themselves on 100% audit transparency, providing clear and detailed reports to their clients. On average, 0xTeam delivers audit reports within 72 hours, enabling swift remediation and reducing project downtime. This rapid turnaround combined with thorough analysis makes them a trusted security partner in the fast-moving Web3 ecosystem.

By ensuring robust security and protecting user assets, 0xTeam enables projects to focus on growth and innovation with confidence. Their comprehensive audits build trust with users and strengthen the overall security posture of decentralised applications.

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Ackee Blockchain is a premier team of Web3 security auditors and white hat hackers dedicated to improving safety and resilience across the decentralised ecosystem. They provide in-depth smart contract audits and blockchain security assessments, helping Web3 teams secure their products before, during, and after deployment. Their mission is clear: strengthen the blockchain space through knowledge-sharing, proactive security, and high-quality technical reviews.

To date, Ackee Blockchain has completed over 175 audits, working with leading projects such as 1inch Network, Lido Finance, Safe Global, Axelar Network, AAVE, LayerZero, and Pendle. Their audit work has uncovered more than 1,977 security issues, with 190 critical and high-severity vulnerabilities found across 83 audits. On average, their team discovers a new issue every working day, including a critical or high-severity issue every 8 workdays—a testament to their sharp detection capabilities and hands-on diligence.

Ackee’s impact goes beyond audits. They develop open-source tools to support secure development practices and operate educational platforms such as the School of Solidity and School of Solana. These initiatives help new developers enter the Web3 space with a strong foundation in secure coding. Combining technical rigour, transparency, and a strong track record with top-tier clients, Ackee Blockchain continues to shape the future of blockchain security.

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Armors provides blockchain code auditing, security testing, monitoring, and alert services. It was one of the first teams to focus on the implementation and security of blockchain technology. The company has since formed strong partnerships with major exchanges including OKEX, Binance, Bybit, Huobi, Bitfinex, KuCoin, MXC, and Bibox, offering professional code audits to a wide client base.

In addition to working with popular smart contract languages such as Solidity and Rust, Armors has developed expertise in the Move language, enabling it to offer specialised audits for Move-based projects. As an audit partner of several leading public blockchains including BSC, Ethereum, Polygon, and Solana, Armors has provided services to more than 2,000 blockchain projects. These include security audits, penetration testing, cross-chain migration reviews, and platform security assessments, helping to protect digital assets valued at over 100 billion US dollars.

The audit process is straightforward and structured. It begins with an evaluation of the smart contract, followed by payment, then a comprehensive audit. The final step is the delivery of a detailed report, issued on time. If any vulnerabilities are identified during the process, Armors notifies the client promptly and advises on the necessary corrections to maintain security.

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Audita is a dedicated security partner to Web3 protocols and decentralised applications, supporting the advancement of the blockchain space through ongoing research, exploit simulation, and preventative measures. With a strong focus on safeguarding digital assets, Audita works closely with development teams to identify vulnerabilities before they can be exploited.

The company’s team of smart contract auditing specialists assists protocols and dApps in securing their platforms against potential threats. By thoroughly reviewing code and testing for weaknesses, Audita helps clients implement robust and efficient security frameworks tailored to their needs. This proactive approach significantly reduces the risk of successful attacks and improves trust among users and investors alike.

In addition to security, Audita places emphasis on writing high-quality, gas-optimised smart contracts. This ensures not only safety but also performance and cost-efficiency. By combining technical excellence with a commitment to research-led innovation, Audita plays an important role in building a more secure and reliable decentralised ecosystem.

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Auditall is a platform designed to simplify the process of sourcing trusted smart contract audits. By connecting projects with multiple reputable auditing firms, it enables clients to compare pricing, turnaround times, features, and past performance with ease. The service is free to use, helping blockchain teams find the right audit partner quickly and without hassle.

Clients can access expert guidance throughout the process to ensure they select the most suitable provider for their specific requirements. The platform offers clear, side-by-side comparisons of firms including well-known names such as Hacken, Certik, Peckshield, and Halborn, among others. Key details such as pricing, number of audits completed, audit timeframes, and additional features like dashboards or post-audit tools are made readily available.

Auditall supports a wide range of project budgets, from early-stage dApps to large-scale Web3 protocols. Whether a project needs rapid turnaround, in-depth analysis, or ongoing security monitoring, the platform offers a streamlined, transparent route to professional auditing support. This makes it an essential resource for teams seeking peace of mind in a fast-moving and complex digital environment.

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Beosin is a global blockchain security and compliance firm offering an all-in-one solution for smart contract audits, risk monitoring, KYT/AML, and cryptocurrency tracing. Founded in 2018 by a group of professors and researchers, the company now boasts a team of over 40 PhDs and operates across more than ten countries, including Singapore, South Korea, and Japan. Beosin has audited over 2,500 smart contracts for major Web3 projects such as PancakeSwap, Uniswap, DAI, and OKSwap, all of which are monitored using its proprietary EagleEye system.

The firm’s services are tailored for developers, crypto businesses, and law enforcement professionals. For developers, Beosin provides in-depth security audits and formal verification to uncover vulnerabilities in smart contracts and chain platforms. Its compliance solutions, including KYT and AML tools, are trusted by more than 100 institutions worldwide, including Binance. For investigative needs, Beosin offers crypto tracing and visual analysis tools to aid in the detection and resolution of cryptocurrency-related crimes.

With a focus on Asian markets and a strong emphasis on data intelligence, Beosin has identified more than 45,000 vulnerabilities and catalogued over two billion wallet address labels. The company holds prestigious certifications, including SOC 2 and ISO 27001, which underline its commitment to high standards in security and data management. Beosin continues to lead the way in blockchain safety through advanced technology and global partnerships.

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Blaize.Security is a specialist provider of blockchain and smart contract auditing services, using the latest technologies to create secure environments for decentralised applications and blockchain ecosystems. With more than five years of experience, Blaize has worked across over 15 different blockchain networks, offering tailored security solutions that meet the evolving demands of the Web3 landscape.

As a trusted name in blockchain security, Blaize delivers advanced auditing and consultancy services designed to protect projects at every level. From smart contract audits to enterprise-grade security frameworks, the team combines deep technical knowledge with a forward-thinking approach. Blaize is known for embracing complex challenges and deploying cutting-edge tools to safeguard both established platforms and emerging protocols.

To date, Blaize has secured over 230 projects across 25 blockchain ecosystems and employs more than 25 expert auditors. The firm has assessed total value locked (TVL) and market capitalisation totalling more than 720 million US dollars, making it a key player in the ongoing effort to secure the decentralised web.

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BlockApex is a blockchain technology firm that combines security engineering with DeFi innovation to create more inclusive, reliable, and sustainable systems. While the team’s history in blockchain dates back to 2019, BlockApex was officially founded in 2021. Since then, it has specialised in resolving security challenges through rigorous auditing services, in-house tooling, and proven methodologies tailored to the needs of modern decentralised platforms.

In addition to security audits, BlockApex provides full-spectrum blockchain development services. These include complex system design, tokenomics research, risk assessment, and strategic DeFi advisory. The firm supports clients from concept through to launch, ensuring that protocols are not only secure but also scalable and compliant with industry standards.

BlockApex also delivers consulting across key areas such as Web3 development and blockchain architecture. Its team transforms Web3 ideas into practical, high-performing solutions that drive long-term project success. With a growing portfolio of real-world success stories, BlockApex continues to be a trusted partner for blockchain ventures seeking both innovation and security.

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BlockSec is a full-stack Web3 security company founded by a team of seasoned researchers and engineers with deep expertise in cybersecurity and blockchain. The firm is committed to safeguarding the decentralised ecosystem by delivering advanced security solutions and infrastructure tools that enable secure and scalable Web3 adoption. With a strong academic and industry foundation, BlockSec specialises in auditing smart contracts, securing EVM-compatible chains, and building platforms that proactively detect, analyse, and prevent exploits.

The company’s flagship platform, Phalcon, is a comprehensive security and compliance suite that offers real-time monitoring, attack detection, and mitigation for blockchain protocols. Phalcon includes Phalcon Explorer, which enables developers and researchers to trace and debug transactions in detail, and Phalcon Fork, a powerful simulation environment for testing smart contracts in mainnet-like conditions. In parallel, BlockSec’s MetaSleuth tool supports fund tracing and crypto crime investigation, while MetaSuites, a browser extension, helps Web3 developers interact safely and efficiently across decentralised applications.

Since its inception, BlockSec has provided pre-launch code audits and on-chain security services for a wide range of leading DeFi projects and protocols. The firm is recognised not only for its technical rigour but also for its role in identifying and mitigating real-world exploits. Its proactive approach and proprietary tools make BlockSec a trusted partner for projects seeking both preventive security and live incident response across the rapidly evolving blockchain landscape.

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BugBlow is a blockchain security platform focused on detecting and eliminating bugs, vulnerabilities, and cyber threats before they can be exploited. The firm provides expert-level smart contract audits and penetration testing to help projects strengthen their code and infrastructure. By identifying potential weaknesses early, BugBlow ensures that Web3 applications are well protected from malicious actors and technical failure.

The platform features a simple and transparent cost calculator, allowing clients to estimate audit fees based on code complexity and volume. This user-friendly tool reflects BugBlow’s commitment to clarity and accessibility in the audit process. Their audits are designed to meet the specific needs of each project, helping clients balance speed, cost, and security outcomes without unnecessary overheads.

In addition to security services, BugBlow invests in education through its training programmes. One of its standout offerings, Threats and Countermeasures, is a 60-day penetration testing course aimed at developers and security professionals. The course combines hardware, software, and ‘wetware’ security, with hands-on projects and a final exam, culminating in a certification. This blend of services and skills training positions BugBlow as a valuable partner for blockchain teams seeking both protection and upskilling in a fast-evolving threat landscape.

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CertiK is one of the most established and widely recognised names in blockchain security. Founded by professors from Yale and Columbia, the firm has played a foundational role in the development of Web3 auditing standards. With a history spanning the early days of decentralised finance, CertiK is often regarded as the industry’s largest and most influential audit provider, trusted by thousands of clients and responsible for securing over $575 billion in market capital.

Their services span far beyond smart contract audits, covering L1 chain audits, proof of reserves verification, formal verification, and in-depth penetration testing. CertiK’s platforms include Skynet for real-time on-chain monitoring and Skynet Score for risk assessment. Tools like SkyNode and SkyInsights deliver solutions in compliance, AML, and risk management, while KYC Verification and Incident Response address trust and crisis control. With more than 17,000 audits completed for nearly 5,000 clients, CertiK combines depth of expertise with unmatched scale.

In addition to technical services, CertiK empowers projects with due diligence advisory, bug bounty programmes, and rapid-response support. Their tools are designed not only to identify vulnerabilities but to build long-term resilience in a rapidly evolving threat environment. Whether safeguarding a new token launch or securing the infrastructure of an entire protocol, CertiK remains a benchmark for best-in-class blockchain security.

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Certora is a blockchain security company best known for its formal verification tool, the Certora Prover. This advanced SaaS platform automatically identifies rare and complex smart contract bugs by mathematically proving their absence. Designed to integrate directly into development pipelines, the tool runs on every code commit, checking all contract paths and states to ensure specified properties hold true. Its capabilities make it an invaluable resource for developers, auditors, and bug bounty participants alike.

The Certora Prover is particularly well suited to smart contracts due to their modular design and the significant consequences of coding errors. By offering rigorous mathematical guarantees, Certora helps teams avoid vulnerabilities that might go undetected through traditional auditing alone. The tool seamlessly complements manual reviews, enhancing trust and resilience across a wide range of decentralised applications and protocols.

Beyond formal verification, Certora provides dedicated security audits, incident response services, and consulting. Its audit process is interactive and highly collaborative, involving expert reviewers and formal methods specialists who work closely with development teams. To date, Certora has helped secure more than $100 billion in TVL, reinforcing its reputation as a key player in the push for safer, more reliable Web3 systems.

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ChainAudits is a German blockchain security provider supporting Web3 projects with advanced auditing, consulting and development services. Focused on identifying and mitigating vulnerabilities before they can be exploited, the company delivers comprehensive smart contract audits and decentralised application assessments. It also offers blockchain-specific consulting for projects seeking to build with confidence and security from the outset.

One of ChainAudits’ defining features is its use of real-time security dashboards, which allow teams, communities and investors to track audit progress and results as they happen. This transparency helps build trust across all stakeholders while giving developers clear visibility into potential threats and fixes. ChainAudits’ involvement begins early and continues throughout a project’s development, supporting security at every stage.

Alongside its technical services, ChainAudits works closely with a growing network of partners across the Web3 space. These include analytics platforms such as Flooz, launchpads like Starter, and decentralised finance hubs including Treble and USDFI. Through this network, the company contributes to a wider culture of accountability, education and secure development, positioning itself as a trusted advisor in the rapidly evolving blockchain ecosystem.

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ChainLight is a blockchain security company focused on delivering tailored audits and actionable recommendations to help Web3 projects strengthen their code. Its work is rooted in precision, reliability and a commitment to client safety. With an impressive track record of zero client compromises, ChainLight has earned a reputation for excellence in uncovering vulnerabilities and providing solutions that align with the specific needs of each project.

The company’s credibility is further supported by an outstanding record in global cybersecurity competitions. ChainLight has consistently achieved top results at leading events such as DEF CON, HITCON, CODEGATE, Google CTF and the Cyber Conflict Exercise. This long-standing success reflects the depth of its technical expertise and its ability to anticipate and neutralise emerging threats in blockchain environments.

In addition to audit services, ChainLight has developed tools to enhance risk visibility and trustless data access in the Web3 space. Its Digital Asset Risk Tracker (DART) identifies hidden risks often missed by standard assessments, offering a more complete view of a project’s security. ChainLight is also behind the Relic Protocol, a trustless oracle system for Ethereum’s historical data that uses zk-SNARKs to eliminate reliance on third-party sources while keeping gas usage efficient.

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ChainSecurity is a Swiss-based blockchain security company specialising in smart contract audits, protocol reviews and formal verification. Renowned for its technical excellence, ChainSecurity provides products and services that ensure the safety and correctness of blockchain applications. The company is behind major tools like Securify, a smart contract analyser, and VerX, a verifier for checking contract behaviour against specifications. Its audits are relied upon by leading DeFi protocols, research institutions and central banks to maintain the highest levels of security and transparency.

Operating since 2017, ChainSecurity has built a reputation for thorough analysis and precise reporting. Its audit process includes comprehensive checks across various protocols and blockchain platforms, with publicly searchable reports that detail every system examined. The firm’s client list features some of the most advanced and complex projects in Web3, from decentralised exchanges to wallets and real-world asset platforms.

Based in Zürich, ChainSecurity runs as a flat, self-owned organisation focused on attracting top-tier talent in security research, program analysis and machine learning. The company’s open and research-driven approach has positioned it as one of the most respected names in the field of decentralised security.

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Code4rena is a smart contract auditing platform that combines competitive and expert-led reviews to help projects find more bugs, faster. Its two-part model includes the Zenith audit, where experienced researchers conduct an in-depth analysis, and the platform’s signature competitive audits, which invite hundreds of auditors to identify vulnerabilities before code goes live. With over 1,365 unique high-severity issues uncovered across 471 audits, Code4rena has transformed the way security is approached in Web3.

Audits can begin within 48 hours, offering a fast and thorough path to mainnet deployment. More than 10,000 registered wardens participate in the platform’s gamified model, surfacing hidden issues and providing practical remediation advice. This approach has attracted leading crypto projects such as Aave, Arbitrum, ZKSync, Coinbase, Chainlink, Optimism and ENS, who rely on Code4rena for security coverage throughout development.

By combining transparency, speed and expert insight, Code4rena has reshaped smart contract security into a collaborative and efficient process. Its model ensures that teams benefit from both targeted audits and the power of community-driven vulnerability discovery, offering confidence at every stage of product delivery.

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CoinFabrik has been delivering reliable security solutions for blockchain platforms and smart contracts since 2014. With over a decade of expertise, they focus on protecting systems from vulnerabilities while enhancing performance and scalability. Their flagship tool, Scout, is an open-source static analyzer that helps developers detect potential security risks and implement best practices throughout the development process.

In addition to security, CoinFabrik offers comprehensive blockchain development services. They create dApps and other Web3 components, designing resilient and high-performance architectures tailored to the unique needs of each product. Their experience spans more than 500 projects, providing clients with expert advice to support growth and innovation in the Web3 space.

CoinFabrik also specialises in custom stablecoin development, token generation events (TGE), and rigorous security audits. Over the years, they have secured more than ten billion dollars in assets and detected over nine thousand vulnerabilities. Their reputation is strengthened by partnerships and roles such as auditors for Polkadot Assurance Legion, Stellar, and Stacks, as well as hosting the first Solana Hackathon in Argentina.

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Coinspect offers thorough security services for blockchain and decentralised systems, including detailed source code reviews, penetration testing, and smart contract audits. Their SSDLC reinforcement integrates security early in the software development lifecycle, identifying vulnerabilities proactively and helping developers build stronger, more secure applications from the start.

Since 2014, Coinspect has focused on protecting users and strengthening the blockchain ecosystem with expert technical services, educational resources, and collaborative research. They specialise in spotting difficult-to-detect, high-risk vulnerabilities across the entire blockchain landscape, from Layer 1 networks to decentralised applications. This enables builders and innovators to navigate the complex world of Web3 and crypto with greater confidence by reducing exposure to risk.

What sets Coinspect apart is their extensive experience, with over 25 years safeguarding advanced technologies even before cryptocurrency existed. Their approach goes beyond generic solutions to deliver tailored, business-centric security strategies that address specific challenges. They work closely with development teams to embed a resilient security mindset, ensuring improvements are integrated smoothly without disrupting workflows. Coinspect is committed to defending your projects as you build them.

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Composable Security provides smart contract audits, threat modelling, and tailored security reviews for Solidity-based blockchain projects. With over six years of experience in traditional cybersecurity, including work with international fintech firms and Poland’s largest bank, the team brings strong technical expertise to Web3. Their clients include FujiDAO, Enjin, Tellor, DIVA, and Volmex Finance, many of whom return for additional audits, reflecting the firm’s reliability and consistent results.

The company focuses on delivering transparent, proactive, and dependable security solutions for blockchain developers. Composable Security has audited protocols holding more than $15 billion in total value locked, with over 60 percent of audits identifying and fixing critical or high-severity vulnerabilities. Half of their clients have already completed more than one engagement, and 95 percent plan to work with the team again.

Services include comprehensive smart contract audits, in-depth threat modelling workshops, and strategic security consultations. Every audit follows a clear and structured process, from initial contact and project scoping to manual review, reporting, and final retesting. Composable Security is backed by the creators of the Smart Contract Security Verification Standard, helping clients build with confidence and peace of mind.

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Consensys Diligence is the security arm of ConsenSys, focused on strengthening the Ethereum ecosystem through technical excellence, secure development practices, and ethical standards. Rather than pushing for rushed launches, Diligence supports high-impact projects to go live when their systems are truly ready. Their goal is to ensure smart contract systems are resilient, user-protective, and built to last. A searchable database of public audits further promotes transparency, allowing developers and users to review past engagements and security outcomes.

Over the years, Consensys Diligence has audited and supported a wide range of notable projects, including MetaMask Delegation Framework, Linea Rollup, Stakewise Vaults, Rocket Pool, and ZK Email Noir. Each audit is detailed and timestamped, offering insights into how the team ensures protocols are secure before mainnet deployment. From simple contracts to complex cross-chain systems, Diligence has contributed to some of Ethereum’s most trusted infrastructures.

To go beyond standard audits, Diligence offers advanced tools like Scribble and Diligence Fuzzing. Scribble allows developers to write smart contract specifications directly in Solidity, enabling runtime verification of expected behaviours. Fuzzing complements this by executing millions of simulated transactions to detect vulnerabilities that may not surface through manual testing. Combined, these tools help developers supercharge their smart contract security, uncovering edge-case bugs before they reach mainnet.

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Cyfrin is a blockchain security firm and developer-focused platform co-founded by Patrick Collins. The team is committed to improving the Web3 developer experience by offering smart contract audits, detailed code reviews, educational content, and specialised tools. Code reviews cover smart contracts, test suites, and documentation, providing developers with best-practice reports and clear checklists to prepare for deployment or full audits. Their full audits involve a thorough examination of every line of code to ensure functionality and security.

Trusted by some of the largest protocols in the space, Cyfrin has helped secure more than 40 billion dollars in total value locked across DeFi projects. Their engineers work directly with development teams to enhance code quality, align with strong security measures, and build user trust. Each audit helps projects demonstrate technical maturity and a strong security posture to their communities and stakeholders.

Cyfrin also operates a wider ecosystem that supports security and learning across Web3. CodeHawks provides competitive audits by connecting protocols with a network of top security researchers. Updraft offers free blockchain development courses in Solidity, Foundry, and smart contract auditing. Solodit aggregates vulnerability data and bug bounty information across the industry. Tools like Aderyn, a Solidity static analyser, and Foundry DevOps further support developers in writing secure and efficient code. Cyfrin’s mission is to raise standards across the blockchain ecosystem through collaboration, education, and innovation.

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Cyberscope is a prominent blockchain security firm offering smart contract audits, KYC verification, and AML analytics. In just over two years, it has become a trusted partner for leading launchpads and platforms including CoinMarketCap, CoinGecko, Polygon Village, and Techstars. With more than 3,459 smart contract audits completed and over 1,400 KYC checks performed, Cyberscope plays a key role in securing the Web3 ecosystem across major networks such as Ethereum, BNB Chain, Solana, and Polygon.

Cyberscope’s services include thorough audits, penetration testing, bug bounty programmes, and custom development. Projects that complete an audit receive a certificate and detailed report, which can help build credibility, attract investment, and support marketing efforts. The team also provides identity verification through KYC services, applying strict validation methods while maintaining confidentiality. These services contribute to a safer environment for investors and developers alike.

Alongside its security offerings, Cyberscope has developed a suite of tools including Cyberscan, Safescan, Similarityscan, and Signaturescan, each designed to analyse code, detect suspicious activity, and enhance project safety. With a growing presence at global blockchain events and consistent recognition from exchanges and listing platforms, Cyberscope continues to shape the standards of smart contract security and compliance within the crypto industry.

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Dedaub is a Web3 security company focused on protecting smart contracts and blockchain protocols. Founded in 2021, the team has completed more than 200 audits and helped secure over $30 billion in assets for clients including the Ethereum Foundation, Chainlink, and Coinbase. With a team made up of white-hat hackers, PhDs, and experienced developers, Dedaub combines academic insight with practical expertise to identify critical risks before they reach the mainnet.

The company’s flagship product is the Dedaub Security Suite, a toolset that performs deep analysis of EVM-compatible smart contracts. It can operate without access to source code or ABI, using advanced techniques like static analysis, formal methods, and transaction simulation to flag vulnerabilities. The platform is built for scale and suited to high-stakes use cases such as on-chain governance, DeFi systems, and protocols using zero-knowledge cryptography.

Beyond their audit and tooling services, Dedaub is active in shaping the future of blockchain security. They are a founding contributor to SEAL (Security Alliance) and a security partner for zkSync. Through their research, open-source tools, and collaboration with leading projects, Dedaub supports the growing demand for safer, more resilient smart contracts across the Web3 ecosystem.

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DeFiSafety is an independent rating organisation that evaluates the technical quality and transparency of decentralised finance protocols. By examining software processes, documentation standards, and adherence to best practices, DeFiSafety assigns a security score to each project. Their goal is to provide DeFi users with objective, reliable insights into how protocols operate behind the scenes, helping investors make more informed decisions in a fast-moving ecosystem.

With more than 340 protocol reviews across 24 blockchains, DeFiSafety has become a trusted resource for measuring and comparing DeFi project quality. Their scores offer an aggregated view of a protocol’s technical robustness, with Ethereum-based projects averaging higher process quality than many alternative chains. These evaluations focus not just on the code itself, but also on the project’s transparency, audit history, and developer practices.

In addition to public ratings, DeFiSafety offers tailored consulting services. Organisations can work with their team to produce custom due diligence reports on tokens, chains, or protocols. These reports are designed to be verifiable and transparent, giving institutions and developers a clear view of where improvements are needed and how to align with industry best practices.

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Guardian is a leading blockchain security firm focused on protecting the most targeted smart contract applications through manual audits and advanced invariant testing. Their smart contract fuzzing technology simulates millions of randomised and targeted transactions, probing systems to uncover hidden vulnerabilities that are not visible through conventional methods. For each project, Guardian’s fuzzing engineers develop a comprehensive stateful fuzzing suite tailored specifically to the smart contract system, offering continuous security coverage even after the initial engagement.

Guardian’s security approach is institutional grade, designed for when projects need to get it right the first time. Their dual-team setup involves two independent groups of expert researchers conducting thorough reviews and rigorous testing, ensuring no critical issues go unnoticed. Clients praise Guardian for their exceptional professionalism, detailed findings, and deep understanding of complex protocols. Major projects such as GMX, Yuga Labs, and Synthetix rely on Guardian’s audits to maintain the highest levels of security.

Guardian offers flexible pricing models including flat-cost and pay-per-vulnerability options, allowing clients to choose the best fit for their budget and risk tolerance. The firm has prevented over 200 critical vulnerabilities and maintains a portfolio of more than 1,000 findings from numerous security reviews. Guardian’s dedication to meticulous auditing, continuous fuzz testing, and rigorous remediation review makes them a trusted partner in the Web3 security space.

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Hacken is a cybersecurity firm specialising in blockchain and Web3 security, originally founded in Kyiv in 2017 and now based in Tallinn, Estonia. The company was established by a group of Ukrainian cybersecurity experts and has since grown to become one of the most recognised names in its field. With more than 2,000 audits completed for over 1,000 clients, Hacken is ISO 27001 certified and operates globally with over 180 partners. Their core philosophy centres on building a secure and ethical Web3 environment, working to eliminate scams, wash trading, market manipulation, and token abuse across the decentralised ecosystem.

The company’s service portfolio includes smart contract audits, blockchain protocol audits, decentralised application (dApp) audits, tokenomics reviews, penetration testing, and regulatory compliance consulting. One of Hacken’s standout offerings is DualDefense, a two-layer audit system combining expert-led code reviews with community-driven bug bounty testing via the HackenProof platform. This approach ensures that vulnerabilities missed in traditional audits are still detected and resolved. To support this, Hacken maintains a Flash Pool fund for rewarding critical bug disclosures found post-audit, enhancing transparency and accountability in their security process.

Hacken also contributes actively to shaping the wider Web3 security landscape. It operates CER.live, a real-time crypto exchange security rating platform referenced by industry players such as Forbes. The company collaborates with global regulators to help develop security frameworks including MiCA, DORA, and CCSS. During the early days of the Ukraine–Russia war, Hacken adapted its infrastructure to support cyber defence operations by launching Liberator, a decentralised DDoS countermeasure. Their commitment to both cybersecurity and social responsibility continues to position Hacken as a leading voice in digital asset protection and blockchain integrity.

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HAKFLOW provides security audits for blockchain-based platforms, including smart contracts, DeFi protocols and DApps. Their team works across both EVM and non-EVM chains, aiming to identify weaknesses and reduce the risk of exploitation during development and deployment.

The firm offers penetration testing for digital assets, infrastructure and crypto wallets. Services are designed to support compliance with regulations such as GDPR and PCI DSS while simulating potential real-world attack scenarios. HAKFLOW also offers ongoing testing and support. This includes a combination of automated and manual methods to help detect new threats and maintain secure operations over time.

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Halborn is a cybersecurity firm focused on securing Web3 and digital finance ecosystems. Its team provides a range of services including smart contract audits, infrastructure penetration testing, and blockchain advisory. The firm supports Layer-1 and Layer-2 protocols, crypto exchanges, and enterprise clients with tailored solutions for high-risk environments. Halborn was founded in 2019 by renowned ethical hacker Steven Walbroehl and growth hacker Rob Behnke.

Since its inception, Halborn has worked with over 600 clients, including major names like Coinbase, Solana, and Polygon. The company has delivered more than 2,500 audits and assessments across Web3 infrastructure, helping organisations strengthen security through code review, attack simulation, and real-time threat identification. Its growing team of over 100 globally distributed professionals includes experts in DevOps, offensive security, and red-team testing, enabling deep and responsive engagement on complex projects.

Halborn also offers ongoing advisory support and software tools to help clients improve their long-term security posture. Its focus on continuous testing and proactive defence allows teams to adapt to emerging risks while maintaining compliance.

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Founded in 2017 as a software audit startup, HashEx has grown into a significant provider of DeFi intelligence and blockchain security services. The team develops software solutions aimed at introducing security standards to the decentralised market. HashEx’s vision is to become the leading DeFi intelligence and security provider, supporting projects with comprehensive smart contract audits, penetration testing, and risk analysis. Their experience spans over 1,500 smart contracts audited and protection of assets exceeding $4 billion across multiple blockchain platforms, including Ethereum, Binance Smart Chain, Solana, and Polygon.

HashEx’s service offering covers a wide range of areas such as smart contract reviews for tokens, NFTs, DAOs, bridges, and lending protocols, as well as penetration testing that simulates real-world threats across application, network, and blockchain layers. They also provide continuous security subscriptions, enabling ongoing monitoring of code changes by multiple auditors to identify vulnerabilities early. In addition, their incident response service assists clients with analysing security breaches, reducing risks, and implementing preventative measures to mitigate future attacks.

Alongside auditing and testing, HashEx delivers advisory and development support, offering tools and expertise that help decentralised projects strengthen their security posture and maintain compliance with evolving industry standards. With a focus on innovation and continuous improvement, HashEx aims to empower clients in the decentralised finance space to build safer, more resilient applications.

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Founded in 2017 as a software audit startup, Hashlock has grown into a leading provider of blockchain security and smart contract auditing services. The team develops software solutions to integrate security standards into decentralized markets. Hashlock’s vision is to become the #1 DeFi intelligence and security provider, offering comprehensive audits, penetration testing, and ongoing security support across various blockchain platforms, including Ethereum, Binance Smart Chain, Solana, and Polygon.

Hashlock’s audit process includes extensive manual code reviews, vulnerability analysis, offensive testing using industry-leading toolkits, and detailed final reports. Their services cover a wide range of blockchain technologies, such as Solidity, Rust, Move, and Cairo, ensuring thorough assessments tailored to each project’s specific needs. The firm also provides on-chain monitoring, bug bounty management, and upgradeable security services to maintain robust protection throughout a project’s lifecycle.

With a commitment to education and community engagement, Hashlock aims to empower developers and stakeholders to understand and mitigate security risks effectively. Their collaborative approach and transparent reporting foster trust and confidence in the security of decentralized applications.

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Hexens is a leading cybersecurity firm specializing in Web3 technologies, offering comprehensive services such as smart contract audits, penetration testing, cryptography assessments, and security advisory. Their team has secured over $120 billion in assets, collaborating with industry leaders like Lido, EigenLayer, RISC Zero, LayerZero, Fuel, 1inch, Ava Labs, and Polygon. Employing a dual independent audit methodology with at least eight engineers per project, Hexens ensures thorough coverage of business logic vulnerabilities, cryptographic security, and implementation flaws.

Beyond traditional audits, Hexens provides advanced tools and platforms to enhance Web3 security. Their next-generation platform, r.xyz, powers the largest Web3 Capture The Flag (CTF) competition and hosts Glider, a blockchain-scale security analysis platform. Glider’s IDE enables structured searches across entire blockchains, allowing developers to define Solidity patterns as Python queries to scan for vulnerabilities in all deployed contracts. Additionally, the Remedy Bug Bounty platform integrates with Slack and JIRA, offering gated report filtering, triaged submissions, and a Zero-Knowledge Proof (ZKP)-based duplicate detection mechanism.

Hexens’ commitment to innovation is evident in their open-source ecosystem, encouraging the development of custom extensions to further enhance security measures. Their collaborative approach and dedication to advancing Web3 security make them a trusted partner for projects seeking robust protection in the decentralized landscape.

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Least Authority was established in the United States in 2011 with the mission to develop freedom-compatible technologies. Since 2014, the company has specialised in security auditing for decentralised systems, often referred to as Web3. Their work focuses on ensuring privacy, security, and transparency within open-source projects, supporting blockchain protocols, distributed storage, and privacy-preserving technologies. Liz Steininger currently leads the company as CEO.

Over the years, Least Authority has built a reputation for thorough and independent security assessments, partnering with prominent projects across blockchain and decentralised networks. Their audits evaluate system architecture, cryptographic implementations, and software design to identify vulnerabilities and improve resilience. The company also contributes to open-source initiatives and promotes best practices to strengthen the broader Web3 ecosystem.

Beyond audits, Least Authority offers consulting services aimed at embedding security and privacy principles early in the development process. Their approach combines technical expertise with a commitment to user freedom and data protection, helping clients navigate the complex challenges of decentralised technology securely.

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MetaTrust Labs, founded in 2021 and incubated at Nanyang Technological University in Singapore, is dedicated to enhancing Web3 security through AI-driven solutions. Their offerings include automated security scanning, intelligent code auditing, and runtime monitoring, designed to assist developers and stakeholders in building secure decentralized applications. With a focus on providing comprehensive security tools, MetaTrust Labs aims to empower developers to create resilient Web3 infrastructures.

The company’s suite of products encompasses MetaScan, an automatic security vulnerability scanner; MetaScout, a 24/7 runtime security monitoring tool; and MetaScore, a comprehensive security and risk assessment platform. These tools integrate advanced technologies to identify and mitigate potential security threats throughout the development lifecycle.

MetaTrust Labs has garnered support from prominent investors, including Redpoint Ventures and GGV Capital, underscoring confidence in their innovative approach to Web3 security. Their commitment to advancing security standards positions them as a valuable partner for projects seeking to enhance the integrity and trustworthiness of their decentralized applications.

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MixBytes is a blockchain security firm specialising in comprehensive smart contract audits and technical advisory services for EVM-compatible and Substrate-based projects. The company conducts in-depth analyses to uncover potential vulnerabilities and provides tailored recommendations to improve the security and sustainability of decentralised applications. Each project is assigned a dedicated team of three full-time senior auditors, ensuring a thorough and focused evaluation process. MixBytes is committed to being more than just an auditor; they serve as a security partner within the Web3 ecosystem. By providing tailored security consulting and support throughout development, they help clients build projects with robust security measures that enable sustainable growth. The company was founded by Aleksey Makeyev, Yuriy Vasilchikov, and Sergey Prilutskiy.

In addition to traditional auditing services, MixBytes develops innovative solutions to advance smart contract security. One example is the MixBytes Camp SoulBound Token (SBT), which helps auditors demonstrate their qualifications and skills publicly. This token, deployed on the Polygon network, serves as a verifiable identity showing an auditor’s track record, number of findings, and skill level, increasing transparency and credibility within the auditing community.

MixBytes also runs the MixBytes Farm educational programme, which has graduated 64 auditors to date. This initiative reflects the company’s commitment to improving the overall security landscape of the blockchain ecosystem by fostering skilled professionals.

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Monethic is a Warsaw-based cybersecurity firm specialising in Web3 and traditional security services. Founded by Jakub Heba and Łukasz Mikuła, the company offers comprehensive audits and assessments for smart contracts, decentralised applications (dApps), and Web2 infrastructures. Their expertise covers various blockchain technologies, including Ethereum, Substrate, CosmWasm, ink!, and Scrypto. Monethic’s team conducts thorough evaluations to identify vulnerabilities and provide actionable recommendations, ensuring the security and integrity of clients’ systems.

The company’s services extend beyond smart contract audits to include penetration testing, security assessments, and architecture reviews. They employ a range of methodologies, such as white, grey, and black-box approaches, to assess the security posture of applications and infrastructures. Monethic serves startups and established organisations across sectors including DeFi, gaming, and enterprise solutions. Their commitment to excellence is reflected in partnerships with notable clients like Orderly Network, Piwik PRO, and EcoWay.

Monethic’s team is led by CEO and co-founder Jakub Heba, a seasoned security researcher and penetration tester with extensive blockchain experience. He is supported by CTO and co-founder Łukasz Mikuła, who brings deep expertise in penetration testing and smart contract auditing. Together, they lead a team dedicated to advancing security practices in the rapidly evolving Web3 landscape.

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MoveBit is a security audit company focused on the Move ecosystem, encompassing both Aptos and Sui blockchains. As a subsidiary of BitsLab, MoveBit aims to establish security standards and deliver comprehensive audits to ensure the safety of Move-based applications. The team comprises security professionals with extensive experience in both academia and enterprise sectors. MoveBit was one of the earliest contributors to the Move ecosystem, collaborating closely with Move developers to set the standard for secure Move applications. Their services include smart contract security audits, DApp security assessments, and blockchain architecture evaluations.

In addition to traditional auditing services, MoveBit has developed several tools to enhance the Move development experience. The Aptos Move Analyzer is a Visual Studio Code plugin that provides language server support and grammar for the Move programming language, specifically for the Aptos blockchain. This tool aids developers in writing secure and efficient Move code by offering features like syntax highlighting, code completion, and error checking. Another notable tool is the Move Scanner, a bytecode detection tool that performs static analysis on Move contracts to identify potential vulnerabilities.

MoveBit’s commitment to security and innovation has been recognized within the blockchain community. They have been awarded grants from the Aptos Ecosystem and have collaborated with various projects to enhance the security of the Move ecosystem.

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Nethermind offers smart contract audit services across multiple blockchain ecosystems, including Ethereum and Starknet. Their global team includes over 350 members across 66 countries and 6 continents. Tomasz Stanczak, Chief Executive Officer and founder of Nethermind, led development of the Nethermind Ethereum client, which secures more than 30% of the Ethereum network.

Their audit process combines manual code reviews with automated tools to identify vulnerabilities and assess contract functionality. Clients receive detailed reports with recommendations to improve security and reliability. Nethermind also provides formal verification and real-time monitoring services to help organisations maintain continuous protection after deployment.

By integrating these services, Nethermind enables projects to enhance the integrity and resilience of their smart contracts while keeping pace with evolving blockchain security challenges.

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Null Return is a blockchain security firm offering comprehensive smart contract audits and full-cycle protection for Web3 projects. Their services encompass manual code reviews, formal verification, fuzz testing, and continuous audit support. The team comprises seasoned blockchain professionals, including hackathon winners and security experts certified by leading blockchain platforms. They have contributed to the development and auditing of high-impact DeFi solutions, such as decentralized exchanges, lending protocols, liquid staking mechanisms, stablecoins, yield optimization tools, privacy solutions, asset management systems, and blockchain-based gaming applications.

Null Return’s audit process includes pre-audits, which are preliminary analyses to detect errors and enhance readability, preparing smart contracts for a full-scale audit. Their smart contract audits involve a thorough security analysis to identify vulnerabilities through broad and in-depth code reviews. Fuzz testing is an automated process that generates random inputs to uncover issues not detected manually. Formal verification employs mathematical methods to ensure the correctness and reliability of smart contract functionality. Continuous audit support ensures ongoing reviews of updates and new functionality by the same team, maintaining quality, reducing costs, and streamlining timelines by minimizing onboarding efforts.

The firm protects projects across various platforms, including Solidity, Cairo, Rust, FunC, and Move, ensuring reliability and minimizing vulnerabilities. They work with projects on Ethereum and EVM-compatible chains, Ton, Solana, Aptos, Sui, and zero-knowledge proof platforms based on Circom and Noir. Their comprehensive approach aims to enhance trust in projects and strengthen confidence in contract security.

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Omniscia is a decentralized team of experienced smart contract auditors specialising in securing complex decentralized networks and applications. They conduct thorough line-by-line security audits to ensure projects conform to the latest standards and are immune to both common and uncommon attack vectors. Their expertise spans various blockchain ecosystems, providing comprehensive security solutions for Web3 projects.

Founded in early 2020 and headquartered in Brussels, Omniscia has rapidly become a trusted name in blockchain security. The team has collectively secured over $200 billion worth of digital assets for more than 300 clients, addressing over 1,500 high-severity issues in widely adopted smart contracts. Their clientele includes industry leaders such as L’Oréal, Polygon, AvaLabs, Gnosis, Morpho, Myso Finance, CLabs, Olympus DAO, Fetch.ai, and LimitBreak.

Omniscia’s audit process includes static analysis, manual code review, and code style evaluations to identify vulnerabilities, bugs, or other potential security issues in the codebase. The team utilises an extensive suite of public and proprietary tools to perform these audits, ensuring a comprehensive assessment of the project’s security posture. They have conducted audits for over 240 blockchain projects, including notable clients such as L’Oréal, Polygon, Ava Labs, Gnosis, and Atari.

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OpenZeppelin is a leading Web3 security firm founded in 2015 by Manuel Araoz and Demian Brener. Headquartered in the United States, the company specializes in securing decentralized applications and smart contracts. Their suite of open-source tools, including the Contracts library and Defender platform, are widely adopted across the blockchain industry. OpenZeppelin has conducted audits for over 400 projects, addressing more than 1,600 high-severity issues. Their client base includes major entities such as Coinbase, L’Oréal, and Polygon.

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OtterSec is a US-based blockchain cybersecurity firm founded by Robert Chen. The company specialises in securing decentralised applications and smart contracts across multiple blockchains. Their experienced team focuses on safeguarding digital assets with comprehensive security audits, vulnerability assessments, and proactive threat mitigation.

OtterSec has worked with over 120 projects, including notable clients such as LayerZero, Wormhole, Metamask, PancakeSwap, and Jito. They have patched vulnerabilities worth more than $960 million and secured over $36.82 billion in on-chain total value locked (TVL). The firm is known for its multichain expertise and strong partnerships with Layer 1 blockchains like Solana, Sui, Near, and Aptos.

Committed to a community-driven approach, OtterSec actively engages with clients through events and initiatives to build trust and foster long-term relationships within the blockchain ecosystem.

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Oxor.io is a blockchain security firm founded in 2021 and headquartered in Dubai Silicon Oasis, United Arab Emirates. The company specialises in smart contract audits, zero-knowledge solutions, and security consulting for DeFi and Web3 projects. Oxor.io has completed audits for notable clients such as Lido, 1inch, Rarible, and deBridge.

The team at Oxor.io combines a decade of blockchain development experience with five years of specialised smart contract auditing. Co-founder Alexander Avdonin plays a key role in driving the company’s technical expertise and innovation. Their audit process involves a mix of manual code review, automated analysis, testing, and simulations to identify vulnerabilities and ensure robust security and functionality.

Oxor.io’s skilled professionals, including expert Solidity developers, focus on delivering tailored security solutions that meet the evolving needs of blockchain projects. Their comprehensive approach aims to help clients deploy reliable and secure smart contracts, strengthening trust across decentralized networks.

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PeckShield is a blockchain security company founded in 2018 by former Qihoo 360 Chief Scientist Xuxian Jiang. Headquartered in China, the company specializes in smart contract audits, vulnerability assessments, and blockchain security solutions. PeckShield has conducted audits for numerous projects across various blockchain ecosystems, including Ethereum, Binance Smart Chain, and Solana. Their services aim to enhance the security and integrity of decentralized applications and smart contracts.

The team at PeckShield comprises experienced professionals with backgrounds in cybersecurity and blockchain technology. They have developed proprietary tools and methodologies to identify and mitigate security risks in smart contracts and blockchain protocols. PeckShield’s expertise extends to areas such as decentralized finance (DeFi), non-fungible tokens (NFTs), and decentralized autonomous organizations (DAOs).

PeckShield’s commitment to blockchain security is reflected in their proactive approach to identifying vulnerabilities and collaborating with project teams to implement effective solutions. Their contributions to the blockchain security landscape have earned them recognition and trust within the industry.

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Perimeter’s mission is to deliver the highest quality fuzzing services to protocols by uniting the world’s foremost fuzzing specialists. They possess extensive expertise in fuzzing a diverse range of protocols, from smaller, niche protocols to some of the largest and most complex in DeFi.

Perimeter has conducted comprehensive fuzzing assessments for major DeFi projects, including Origin Protocol’s OETHVault. Their reports identify potential vulnerabilities, such as rounding errors that could lead to stolen yield, and provide recommendations to mitigate risks. For instance, in the OETHVault report, Perimeter highlighted a high-risk finding suggesting that malicious actors could exploit rounding errors to misappropriate funds, with recommendations to mitigate such risks through code adjustments.

Additionally, Perimeter contributes to the open-source community through projects like Fuzzlib, a general-purpose Solidity fuzzing library compatible with tools like Echidna, Medusa, and Foundry. Fuzzlib provides utilities for assertions, value clamping, logging, math operations, and more, aiding developers in enhancing the security of their smart contracts.

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Quantstamp is a leading blockchain security company founded in 2017 and headquartered in Toronto, Canada. Since its inception, the company has secured over $200 billion in digital assets across more than 1,100 projects spanning 55+ ecosystems, including Ethereum 2.0, Solana, Polygon, and Avalanche. Trusted by industry giants such as OpenSea, MakerDAO, and Visa, Quantstamp provides comprehensive smart contract audits, infrastructure assessments, and insurance products to safeguard decentralized applications and protocols.

The company’s audit services encompass both automated and manual evaluations, covering a wide array of blockchain applications; from Layer 1 and Layer 2 protocols to DeFi platforms and NFT marketplaces. Quantstamp’s team comprises experts from organizations like Google, Meta, and the Ethereum Foundation, bringing deep expertise in formal verification, static analysis, and penetration testing. Additionally, Quantstamp offers managed security services for continuous monitoring post-deployment and provides Chainproof, a regulated insurance product that protects against smart contract hacks and slashing risks.

Beyond its core security offerings, Quantstamp is committed to advancing the Web3 ecosystem through strategic investments, partnerships, and educational initiatives. The company has received multiple grants from the Ethereum Foundation for Layer 2 security and scaling, underscoring its dedication to the growth and sustainability of decentralized technologies.

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to enhance the security and functionality of (dApps). With over 1,400 projects audited and more than $3 billion in on-chain value secured, QuillAudits has established itself as a trusted partner in the Web3 ecosystem.

The firm’s auditing process involves a multi-layered approach, beginning with an in-house code review followed by an independent assessment by their Vigilant Squad, a team of external security researchers. This dual-layered methodology ensures a thorough examination of the smart contract code, identifying potential vulnerabilities and providing actionable remediation steps.

QuillAudits supports a wide range of blockchain platforms, including Ethereum, Solana, Polygon, and zkSync, among others. Their expertise extends to various smart contract languages and frameworks, ensuring comprehensive security assessments tailored to the specific needs of each project.

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Resonance Security is a comprehensive cybersecurity firm headquartered in New York City. The company offers a full-spectrum suite of services and tools designed to protect businesses and individuals across both Web2 and Web3 environments. Their offerings include penetration testing, smart contract audits, cloud security, incident response, and a proprietary SaaS platform that provides real-time threat detection and a dynamic security score. Resonance Security aims to make advanced cybersecurity accessible, effortless, and tailored to each organization’s unique needs.

The company’s platform integrates offensive and defensive strategies, combining expert-led services with continuous monitoring capabilities. Clients benefit from tools like PulseCheck, a free cybersecurity assessment tool that quickly identifies security risks and offers customized solutions. Additionally, Resonance Security provides education and awareness programs, phishing campaign simulations, and compliance assistance to ensure comprehensive protection.

Resonance Security has garnered trust from various sectors, including finance, healthcare, technology, and Web3. The company has served hundreds of institutions and individuals, discovering previously undetected vulnerabilities in all engagements and maintaining a 100% satisfaction rate. Their team comprises experienced professionals with certifications such as OSCP, OSCE, and OSWE, bringing expertise from Fortune 500 companies and specialized Web3 audit firms.

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RugDog is a specialised smart contract auditing firm focused on securing blockchain projects across multiple platforms, including Ethereum and Binance Smart Chain. With over five years of experience, RugDog delivers thorough audits for tokens, DeFi protocols, NFTs, wallets, and play-to-earn games.

Their auditing process combines automated testing with detailed manual reviews by experienced security auditors. RugDog’s multi-phase approach begins with gathering project requirements, followed by automated error detection, manual vulnerability assessments, and culminates in comprehensive audit reports. These reports provide clients with clear insights and actionable recommendations to enhance their smart contract security.

RugDog offers flexible audit plans to suit different project needs, including a Simple Plan targeting common issues with a three-day turnaround and a more detailed Complex Plan with critical scenario analysis and optional KYC verification. Clients can initiate audits easily via Telegram by submitting their contract or GitHub repository and typically receive responses within one business day.

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Runtime Verification Inc. is a cybersecurity firm specializing in formal methods to enhance the safety, reliability, and correctness of software systems, particularly in the blockchain domain. Founded in 2010 by Professor Grigore Roșu, the company applies mathematical techniques to perform rigorous audits and verification of smart contracts and blockchain protocols. Their approach aims to identify vulnerabilities and ensure that systems operate as intended under various conditions.

The company’s audit methodology involves a two-step process: design modeling and code review. In the design modeling phase, auditors formally describe the system and review the supplied specifications to identify flaws in logic and establish essential properties of the protocol. During the code review, the code undergoes thorough analysis to detect mathematical and common coding errors, ensuring that the code faithfully implements the design and that identified properties hold.

Runtime Verification has worked with numerous high-profile clients, including the Ethereum Foundation, Solana Foundation, Optimism, and MakerDAO. Their commitment to security is reflected in their transparent pricing model, with audits taking a minimum of three weeks per 1,000 lines of code to ensure consistent quality. Additionally, they offer a suite of tools such as Kontrol, Simbolik, and KaaS to assist developers in formal verification and security testing.

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Safe Edges is a blockchain security firm founded in 2023 and based in Madhya Pradesh, India. The company specialises in smart contract audits and Web3 security assessments across multiple chains.

With over 120 projects secured, 350+ vulnerabilities identified, and more than $500 million in funds protected, Safe Edges has quickly built a reputation for precision and reliability. Their services span smart contract audits, dApp testing, API security, and cloud infrastructure assessments. Supporting over 15 blockchain ecosystems, the team offers both manual and automated security reviews, catering to a wide range of DeFi protocols, NFT platforms, and Web3 infrastructure projects.

Clients praise Safe Edges for its fast turnaround times, collaborative approach, and transparent communication. The firm is recognised for helping projects identify critical flaws before deployment, often preventing high-stakes exploits. As trusted partners of over 110 Web3 ventures, including Fuel Chain and Berachain, Safe Edges continues to expand its presence across the decentralised security landscape.

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Salus Security, also branded as Salusec, is a blockchain-focused cybersecurity firm headquartered in Singapore. The company offers a suite of services that include smart contract audits, Web3 penetration tests, and advanced zero-knowledge (ZK) solutions.

Their smart contract audit methodology blends automated vulnerability scanning—powered by AI and machine learning—with detailed manual reviews and threat modeling. Salus has developed a tool named Lightning Cat, which enables efficient, cost‑effective detection of common and complex vulnerabilities in smart contracts. In addition, their Web3 penetration testing service evaluates middleware components and cloud interactions, going beyond code to assess the full application stack.

Salus has published numerous audit reports and has been recognized for making blockchain security accessible to a broader audience through scalable tools. Their GitHub presence includes repositories like ‘Salus‑audit’, ‘pentest’, and a ‘zksecurity‑framework’ addressing zero‑knowledge vulnerabilities. Through its research-driven, technology-focused approach, Salus positions itself as a dependable partner for blockchain projects seeking both automated and expert-led security validation.

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ScaleBit, operating as a sub-brand of BitsLab, is a blockchain security team that specializes in auditing protocols within the Bitcoin ecosystem and emerging Web3 environments.

Their audit services emphasize formal verification, static analysis, fuzz testing, and detailed manual code review. ScaleBit has completed public audits for high-profile projects such as bitSmiley—a stablecoin and lending ecosystem on Bitcoin’s Fintegra stack—and Merlin Chain, a Bitcoin Layer 2 bridge initiative. Their methodology integrates testing, code review, and formal verification, striving for accuracy and transparency in findings. The team consists of seasoned professionals with backgrounds in academia and enterprise, advancing blockchain interoperability and zero-knowledge technologies.

ScaleBit also publishes detailed audit reports—including those for Nirvana, TagAI, AILayer, zksync-contract-v2, and ZKFair—demonstrating consistency in identifying vulnerabilities such as reentrancy risks, centralization issues, missing validation logic, and flawed token logic. Their open-source presence on GitHub includes repositories like Sampled-Audit-Reports, OpenTap, and Technical-Ref—highlighting best practices for Bitcoin Layer 2, zk proofs, and security standards. Positioned as a forward-thinking player in the mass adoption of Web3, they support security for interoperability and scalability-focused protocols across various chains including Solana, Starknet, BNB Chain, Kaia, and more.

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SCV Security is a specialist Web3 auditing and advisory firm focused on delivering secure and scalable smart contract systems. Founded by veterans in blockchain development and formal verification, the firm takes a proactive and deeply technical approach to reducing risks for DeFi protocols, NFT infrastructure, and decentralised applications.

Their audit methodology combines formal logic-based specification, symbolic execution, manual code review, and fuzz testing. SCV tailors its audits to the protocol’s architecture, offering bespoke assessments that go beyond template checks. Their team regularly uncovers complex logic bugs, authorisation oversights, and incentive misalignments that automated tools often miss. SCV also assists clients with protocol design reviews, post-deployment monitoring, and upgrade safety.

With a growing reputation in the Ethereum and Layer 2 ecosystems, SCV Security has supported some of the most widely used open-source protocols. The firm’s work is recognised for its technical precision, rigorous standards, and transparent reporting. As security challenges in Web3 evolve, SCV continues to advocate for research-backed auditing practices that prioritise long-term resilience over surface-level fixes.

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SecureDApp is a blockchain security company based in Bangalore, India, providing smart contract auditing and Web3 risk mitigation services to developers, protocols, and enterprises. With support for over 15 major chains including Ethereum, BNB Chain, Polygon, and Solana, SecureDApp has built a reputation for efficient, AI-driven auditing tools and rapid turnaround.

Central to its services is Solidity Shield, an AI-powered scanner that identifies over 150 vulnerabilities in Solidity-based smart contracts. The platform combines static analysis, symbolic execution, fuzz testing, and human review to deliver accurate and readable reports. Its Audit Express tool allows users to instantly assess the security of their smart contracts via GitHub or direct uploads, streamlining feedback during development cycles.

Beyond audits, SecureDApp offers full-spectrum Web3 security solutions. SecureWatch provides real-time threat detection and anomaly monitoring, enabling proactive defence of deployed protocols. Meanwhile, SecureTrace delivers blockchain forensics and transaction tracing to support compliance and investigative needs. SecureDApp’s suite also includes token audits, DApp assessments, and real-world asset validation, making it a comprehensive partner for securing the decentralised ecosystem.

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Security Research Labs (SRLabs) is a Berlin-based cybersecurity consultancy and research firm with a global outlook. Founded in 2010, SRLabs has built a reputation for combining deep technical hacking expertise with practical consulting. Their work supports clients in telecommunications, finance, critical infrastructure, and emerging tech sectors. The team is known for tackling complex security challenges and producing original research that influences industry standards and practices.

SRLabs offers a range of services including red teaming, telco infrastructure audits, device security testing, vulnerability discovery, and team development. Their research output is notable for uncovering systemic weaknesses in mobile networks, firmware, and internet infrastructure. SRLabs has also exposed large-scale scams and vulnerabilities in real-world deployments, such as weaknesses in SIM card encryption and global fraud networks exploiting fake webshops.

In 2024, SRLabs joined Allurity, a pan-European cybersecurity group, while retaining its independent spirit and focus on research-driven security innovation. The firm promotes a hacker mindset, encouraging curiosity and deep problem-solving. Its mission is to accelerate the transfer of offensive security knowledge into defensive capabilities, helping organisations become more resilient without hindering technological progress.

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SharkTeam is a Web3 security service provider established in 2021. The company offers a range of services including smart contract auditing, on-chain analytics, risk alerting, and emergency response solutions. Their team of security professionals works across various blockchain platforms to help identify and mitigate security risks in the decentralized ecosystem.

SharkTeam tracks security trends and emerging threats in the Web3 space, providing detailed analysis to help projects understand and prepare for potential vulnerabilities. Their research highlights common attack vectors and patterns, informing better risk management and security practices across the industry.

To address these threats, SharkTeam developed ChainAegis, a risk identification platform that provides real-time monitoring and alerts for potential security issues. This tool aims to support early detection and mitigation of risks, contributing to improved security management for Web3 projects.

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Sherlock is a blockchain security platform that offers a comprehensive suite of services to protect DeFi protocols from smart contract vulnerabilities. Founded by Jack Sanford and Evert Kors, Sherlock provides a unique approach by combining traditional audits with competitive audit contests, collaborative reviews, and post-deployment coverage.

The platform’s ecosystem includes three main participants: protocols seeking audits, “Watsons” (security researchers), and independent auditors. Protocols can engage in Sherlock’s audit contests, where top-ranked auditors identify vulnerabilities in the codebase. Additionally, Sherlock offers “Sherlock Shield,” a coverage program that provides financial protection against critical exploits in audited contracts, with payouts up to $500,000.

Sherlock’s innovative model aims to enhance the security of DeFi protocols by incentivizing thorough audits and providing financial safeguards. By integrating competitive and collaborative elements, Sherlock seeks to address the evolving challenges in blockchain security and contribute to the overall safety of the DeFi ecosystem.

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Sigma Prime is a blockchain security and research firm based in Sydney, Australia. It has earned a strong reputation for delivering thorough security assessments of decentralised technologies. Sigma Prime is also the creator and maintainer of Lighthouse, a popular Ethereum consensus client written in Rust, demonstrating its commitment to both development and security auditing.

The company offers a wide range of services including smart contract audits for EVM and non-EVM chains, evaluations of zero-knowledge systems, and assessments of blockchain primitives and infrastructure. Their expertise covers Layer 2 protocols and innovative consensus mechanisms, making them a versatile partner for projects seeking to strengthen their security. Sigma Prime’s client portfolio includes prominent names such as Chainlink, Dapper Labs, and AlphaWallet.

Beyond client work, Sigma Prime actively contributes to the blockchain community through research and open-source projects. Their blog provides detailed technical insights, while their public GitHub repositories share security reviews and tools, highlighting their transparent and collaborative approach to securing decentralised systems.

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SlowMist is one of the most established and active blockchain security firms, founded by a team with extensive experience in network security. The company provides comprehensive security solutions designed to enhance the safety and trustworthiness of blockchain applications worldwide.

Their wide-ranging services include smart contract audits, exchange and wallet security assessments, blockchain infrastructure audits, red teaming, threat intelligence, incident response, and security consulting. These offerings address vulnerabilities from code level to operational and infrastructure risks.

SlowMist has completed over 1,500 smart contract audits across major blockchain platforms such as Ethereum, Solana, Aptos, and EOS. They have identified hundreds of critical vulnerabilities and developed proprietary tools like MistTrack for asset tracking and FireWall.X for smart contract protection, contributing significantly to blockchain security advancements.

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SmartState is based in Dubai, UAE. It was founded by Andrei Kurkin, Sergey Belets, Dmitriy Subbotin, Juliet Su, and Alex Beletc. The firm focuses on providing comprehensive smart contract audits and blockchain security services, helping to secure projects across multiple blockchain platforms including Ethereum, Solana, and TON.

SmartState employs a manual, white-hat approach to uncover vulnerabilities, emphasising deep code analysis and architecture reviews. Their audit process includes dependency checks, performance validation, and verification of use cases and user interfaces. This thorough methodology aims to ensure both security and usability for blockchain applications.

In addition to client services, SmartState contributes to the broader Web3 community by publishing research and educational materials. Their work on detecting complex vulnerabilities such as state-reverting bugs highlights their commitment to advancing security practices and improving transparency in the blockchain ecosystem.

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Cantina is a Web3 security platform providing services to financial institutions, DeFi protocols, centralized exchanges, Layer 1 and Layer 2 blockchains, NFT projects, and more. Their offerings include smart contract reviews, penetration testing, multisignature security, incident response, bug bounty programmes, security competitions, and advisory services. Cantina combines scalable, modular security solutions with a network of security researchers to protect clients from pre-deployment through runtime.

The platform features Cantina Code, an in-house tool designed to facilitate efficient communication and collaboration between security researchers and clients. Researchers can submit and manage findings, engage in discussions, and generate reports, while clients can respond to issues, manage users, and access active and past security reviews via a company dashboard.

Cantina also runs a Fellowship Program to engage the community and develop talent in Web3 security. Additionally, they provide resources such as public reports, guides, and leaderboards to promote education and awareness within the blockchain security space.

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Statemind is a blockchain security firm specialising in smart contract audits and protocol design analysis. Founded in 2022, the company has audited over 200,000 lines of Solidity and Vyper code, helping to secure more than ten billion dollars in total value locked across various blockchain ecosystems.

Their audit process follows a structured five-step methodology: project review, code analysis, interim reporting, bug fixing, and final verification. This approach ensures thorough security assessments and timely identification of vulnerabilities.

Statemind also runs a fellowship program to train and mentor the next generation of blockchain security experts. This initiative supports individuals aiming to build careers in Web3 security and contribute to the ecosystem’s long-term safety.

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SecHub is a cybersecurity platform specialising in smart contract audits for Web3 projects. It provides tailored auditing services with real-time monitoring and transparent processes.

The platform matches projects with auditors experienced in the specific codebase to streamline communication and issue resolution. Its workflow includes onboarding, audit kickoff, issue discovery, detailed analysis, and remediation guidance to ensure thorough security assessments.

SecHub also offers user governance features, allowing clients to access their audit history and current jobs through personalised profiles. This supports ongoing security management and builds trust through transparency.

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Three Sigma is a blockchain security firm focused on improving the safety and resilience of Web3 infrastructure. The company has conducted over 100 security audits, protecting more than eight billion dollars in client assets and securing over 180 billion dollars in transaction volume. Their work spans multiple ecosystems including Ethereum, Solana, Aptos, and Sui, and they have collaborated with leading projects such as Uniswap, Arbitrum, zkSync, and Liquity.

Their services include smart contract and economic audits, operational security assessments, and incident response. They focus on identifying both technical vulnerabilities and economic risks to help build stronger blockchain systems.

Beyond client work, Three Sigma contributes to the wider community through educational content and detailed blog posts. These resources provide insights into common smart contract weaknesses, DeFi exploits, and evolving security trends in the Web3 space. The firm is well regarded for its holistic perspective on blockchain security and its dedication to advancing secure development practices.

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TonBit is the primary security provider for the TON blockchain ecosystem. It operates under BitsLab and is recognised by the TON Foundation for its smart contract audits and technical expertise.

TonBit has audited more than 30 projects built on TON, including Catizen, UTonic, Fiva Protocol and Torch Finance. The team has uncovered multiple critical and medium-risk vulnerabilities in the TON Virtual Machine, including bugs related to null-pointer dereferences and continuation handling. Their disclosures have consistently resulted in patches and official acknowledgements from the TON Core team. These efforts have strengthened the reliability of TON’s runtime and improved test coverage across the ecosystem.

In addition to technical audits, TonBit contributes to the community by hosting CTF competitions, hackathons and publishing ecosystem-wide security reports. Their work helps developers, auditors and node operators identify threats and adopt best practices for secure development in TON-native languages like Tact and FunC.

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Trail of Bits is a cybersecurity research and engineering firm founded in 2012 by Dan Guido, Dino Dai Zovi, and Alex Sotirov. Based in New York, the company has become a trusted partner for organisations requiring deep technical expertise in secure software development, cryptography, and threat modelling. Trail of Bits supports a wide range of clients, including Fortune 500 companies, government agencies, and high-profile blockchain protocols, bringing a hacker-first mindset to solving some of the most complex security challenges.

The company offers services in software assurance, blockchain and smart contract auditing, cryptographic analysis, AI/ML security, and secure system design. It is well known for building and releasing high-impact open-source tools and frameworks, including fuzzers, static analysers, and symbolic execution engines. Trail of Bits regularly contributes to the broader security community through open-source initiatives, audits of critical software, and development of standards in areas such as package signing and secure build systems.

In addition to commercial work, Trail of Bits is heavily engaged in public sector research. It collaborates with agencies like DARPA, the Department of Defense, and the Department of Justice to advance cybersecurity innovation through formal verification, automated reasoning, and low-level systems analysis. With its combination of deep technical research and practical implementation, Trail of Bits operates at the intersection of cutting-edge security science and real-world application.

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Verichains is a blockchain security and cryptography firm founded in 2017 and based in Ho Chi Minh City, with additional presence in Singapore. Known for its elite team of white-hat hackers, cryptographers, and security engineers, Verichains has played a leading role in uncovering and mitigating some of the most high-profile Web3 security breaches. This includes its involvement in the investigations of major bridge hacks affecting BNB Chain and the Ronin Network, which together resulted in losses of hundreds of millions of dollars.

The company provides a broad suite of services tailored to blockchain infrastructure, including smart contract audits, cryptographic analysis, protocol reviews, penetration testing, and mobile app security. Verichains has developed in-house research tools such as Revela, a decompiler for Move smart contracts, and TSSHOCK, which targets vulnerabilities in Multi-Party Computation-based key management systems. Their work often combines deep manual analysis with novel tooling to expose vulnerabilities that automated systems may overlook, particularly in areas involving cryptographic implementation flaws.

With more than 200 clients across the Asia-Pacific region, Verichains currently helps secure over $50 billion in digital assets. Their portfolio includes major industry players such as Binance, Polygon, Aptos, Sui, Ronin, Klaytn, and Wemix. They also contribute to public research and vulnerability disclosure, having revealed key extraction flaws in threshold signature schemes used across the Web3 space. Verichains has earned a reputation for pushing the boundaries of blockchain security research while actively supporting clients with both preventative and reactive security services.

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Veridise is a blockchain security company founded in 2021 by researchers from the UToPiA group at the University of Texas at Austin. Built on a strong foundation in program analysis, formal verification, and automated reasoning, the firm aims to bring academic rigour to real-world blockchain applications. Veridise’s team has grown to include over 35 engineers and researchers, offering a specialised focus on auditing smart contracts and zero-knowledge (ZK) circuits.

The company provides high-assurance audits across DeFi protocols, L1/L2 infrastructure, NFT platforms, and wallet integrations. Their audit methodology combines manual code review with proprietary tools such as OrCa, ZK Vanguard, Vanguard, and Picus. These tools enable Veridise to detect vulnerabilities that typical static analysers often miss, particularly in the rapidly evolving ZK space. Clients include well-known blockchain projects like Scroll, Succinct, RISC Zero, Semaphore, Linea, and Manta Network.

In 2022, Veridise secured $4.7 million in seed funding led by Polychain Capital, with backing from Hack VC, Coinbase, ConsenSys, the Ethereum Foundation, and others. This funding has supported the development of scalable verification tooling capable of proving exploitability through attack synthesis and verifying correctness properties beyond standard vulnerability scans. Veridise continues to play a key role in advancing blockchain safety through a blend of cutting-edge research and security engineering.

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Web3 Antivirus is a security suite designed to protect users from scams and malicious activities in the Web3 ecosystem. It offers a free browser extension that detects and blocks over 60 types of crypto scams, including honeypots, wallet drainers, and phishing attempts, before users sign transactions. The extension integrates smoothly with major decentralized applications and provides real-time alerts to ensure safer interactions with Web3 platforms.

Beyond the browser tool, Web3 Antivirus provides a security dashboard that helps users monitor their wallet health, manage token approvals, and assess risks linked to their digital assets. It also offers integration with MetaMask for in-wallet risk alerts and a Telegram mini app to extend protection for mobile users. These tools empower individuals to maintain control and make informed decisions while navigating the decentralized space.

For businesses and developers, Web3 Antivirus supplies API access to incorporate security features into their platforms. This includes transaction and wallet screening, bot protection, and brand impersonation defense aimed at reducing liability and shielding users from evolving threats. Its proactive and user-focused approach makes Web3 Antivirus a key resource for securing activity across the decentralized web.

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Zellic is a blockchain security research firm founded by experienced hackers and vulnerability researchers. They specialise in conducting thorough, high-impact audits for emerging blockchain protocols and have earned the trust of notable projects such as Injective, Sui, Scroll, and LayerZero.

Their audit process goes beyond standard automated tools by combining extensive manual code review with techniques like model checking, fuzzing, and symbolic execution when necessary. Zellic focuses not only on common code vulnerabilities but also on business logic and integration risks, delivering comprehensive reports with severity rankings based on potential impact.

Zellic also contributes to the ecosystem by developing innovative tools such as Masamune, a searchable database of audit insights enhanced with AI to help developers avoid common mistakes. Additionally, they support blockchain infrastructure as a validator and reinvest staking rewards into audit credits for projects within their network, demonstrating a strong commitment to improving blockchain security.

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Zokyo is a cybersecurity and blockchain consultancy founded in 2019, offering security auditing and venture-building services to Web3 startups. Based in Los Angeles, the firm blends technical expertise with economic advisory to support both product development and secure protocol deployment.

Its core offerings include smart contract audits, cryptographic reviews, penetration testing, and adversarial threat simulations. Zokyo’s audit methodology integrates fuzzing, invariant testing, and manual review tailored to languages such as Solidity, Rust, Go, and Move. With support across ecosystems like Ethereum, Solana, Cosmos, Avalanche, and TON, the firm ensures coverage for both EVM and non-EVM chains. Zokyo also prioritises clarity in its reporting, delivering actionable findings with severity rankings and remediation guidance.

Beyond technical audits, Zokyo operates Econ Lab, a division focused on tokenomics design and simulation. Projects working with Zokyo benefit from economic modelling, mechanism validation, and compliance-minded structuring. The firm also collaborates with security partners in the wallet and infrastructure space, offering a broader protective framework for institutional clients and retail-facing dApps alike.

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