# Best Smart Contract Audit Services *By [Lauren Worth](https://research.g2.com/insights/author/lauren-worth)* Smart contract audit service providers help businesses by assessing the security and reliability of [smart contracts](https://www.g2.com/categories/smart-contracts). This cybersecurity service reviews the smart contract code to identify potential vulnerabilities and security risks. They help ensure that the smart contract will perform as intended and cannot be exploited by attackers to steal funds or disrupt the operation of the blockchain network. Smart contract security auditing is a crucial activity that ensures the reliability and integrity of smart contracts. By ensuring that security risks are identified and addressed, smart contract audit service providers can help prevent financial losses and protect the interests of all the parties involved in the transaction. [Cybersecurity consulting providers](https://www.g2.com/categories/cybersecurity-consulting) also often provide smart contract auditing services. To qualify for inclusion in the Smart Contract Audit category, a service provider must: - Identify and mitigate any potential vulnerabilities or security risks in smart contracts - Perform manual and automated reviews of smart contract code to identify inefficient code and poor coding practices - Review the smart contract’s architecture and design and provide recommendations ## Category Overview **Total Products under this Category:** 38 ## Trust & Credibility Stats **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 0+ Authentic Reviews - 38+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## Top-Rated Products (Ranked by G2 Score) ### 1. [Softstack](https://www.g2.com/products/softstack/reviews) Softstack is an Industry Leader in Web3 custom software development, smart contract auditing, and Web3 consulting. Made in Germany. Softstack has a zero exploit record on 1,200+ smart contract audits. Trusted by global brands such as Ripple, TON, BitGo, Anchorage Digital, Siemens AG, 1inch and many more. **Average Rating:** 5.0/5.0 **Total Reviews:** 6 **Seller Details:** - **Seller:** [softstack GmbH](https://www.g2.com/sellers/softstack-gmbh) - **Year Founded:** 2017 - **HQ Location:** Flensburg, DE - **LinkedIn® Page:** https://www.linkedin.com/company/softstack (11 employees on LinkedIn®) ### 2. [Antier Solutions](https://www.g2.com/products/antier-solutions/reviews) Antier Solutions is a blockchain development company providing a host of offerings like white label crypto exchange and wallet development, P2P lending platform development, ICO/STO/IDO, coin development, crypto banking platform development, DeFi development, NFT development, metaverse development, DAO development. **Average Rating:** 4.4/5.0 **Total Reviews:** 4 **Seller Details:** - **Seller:** [Antier Solutions](https://www.g2.com/sellers/antier-solutions) - **Year Founded:** 2005 - **HQ Location:** Sahibzada Ajit Singh Nagar, Punjab, India - **Twitter:** @antiersolutions (3,405 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/antiersolutions/ (759 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 50% Mid-Market, 25% Enterprise ### 3. [BlockChainSentry](https://www.g2.com/products/blockchainsentry/reviews) BlockChainSentry offers end-to-end custom, scalable, Web-3-based blockchain security solutions, including vulnerability management, smart contract audits, compliance audits, penetration testing, threat intelligence, and test automation. **Average Rating:** 4.0/5.0 **Total Reviews:** 1 **Seller Details:** - **Seller:** [BlockChainSentry](https://www.g2.com/sellers/blockchainsentry) - **Year Founded:** 2021 - **HQ Location:** Concord, US - **LinkedIn® Page:** https://www.linkedin.com/company/blockchainsentry (4 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Small-Business ### 4. [OpenZeppelin](https://www.g2.com/products/openzeppelin/reviews) OpenZeppelin Contracts helps you minimize risk by using battle-tested libraries of smart contracts for Ethereum and other blockchains. It includes the most used implementations of ERC standards. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 **Seller Details:** - **Seller:** [OpenZeppelin](https://www.g2.com/sellers/openzeppelin) - **Year Founded:** 2015 - **HQ Location:** Distributed organization, OO - **Twitter:** @OpenZeppelin (58,766 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/6624089 (122 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Small-Business ### 5. [Ambisafe Smart Contract Audit](https://www.g2.com/products/ambisafe-smart-contract-audit/reviews) Ambisafe smart contract reviews help to ensure the stability of your project. It is important to identify problems before deploying your code. Do not underestimate how crucial this is. Once your code is on the main network, you can not modify it. Luckily, our Solidity team excels at finding and fixing Smart Contract issues. Our team’s lead-software architect Oleksii Matiiasevych, helped to save millions of dollars from hackers in July 2017. There is no team better qualified to review your smart contracts. Avoid errors that could risk your project and company. Demonstrate your commitment to security and quality with our smart contract review and stamp of approval. **Seller Details:** - **Seller:** [Ambisafe](https://www.g2.com/sellers/ambisafe) - **Year Founded:** 2015 - **HQ Location:** San Francisco, US - **LinkedIn® Page:** https://www.linkedin.com/company/ambisafe/ (19 employees on LinkedIn®) ### 6. [AnChain.AI](https://www.g2.com/products/anchain-ai/reviews) Leading AI blockchain #security company identifying and solving vulnerabilities for exchanges, wallets, blockchain protocols and DApps. **Seller Details:** - **Seller:** [AnChain.AI](https://www.g2.com/sellers/anchain-ai) - **Year Founded:** 2018 - **HQ Location:** San Jose, US - **Twitter:** @AnChainAI (6,467 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/anchainai/ (20 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Mid-Market ### 7. [Axomium](https://www.g2.com/products/axomium/reviews) We are a software development company that specializes in Decentralized Technology and Web3 Development. Our team of highly skilled professionals can provide top-notch web3 expertise to augment your projects or team. With our extensive experience, we are capable of developing your Minimum Viable Product (MVP) in the shortest time possible, ensuring rapid and efficient delivery. Partner with us to leverage our expertise and achieve your business goals in the decentralized technology space. **Seller Details:** - **Seller:** [Axomium](https://www.g2.com/sellers/axomium) - **Year Founded:** 2023 - **HQ Location:** Dubai, AE - **LinkedIn® Page:** https://www.linkedin.com/company/axomium-labs/ (5 employees on LinkedIn®) ### 8. [byterocket](https://www.g2.com/products/byterocket/reviews) Ready for Lift-Off? Expert software development and professional smart contract audits by experienced engineers, turning your problems into solutions. **Seller Details:** - **Seller:** [byterocket](https://www.g2.com/sellers/byterocket) - **Year Founded:** 2020 - **HQ Location:** Flensburg, DE - **LinkedIn® Page:** https://www.linkedin.com/company/70431135 (2 employees on LinkedIn®) ### 9. [CertiK](https://www.g2.com/products/certik/reviews) A comprehensive security assessment of your smart contract and blockchain code to identify vulnerabilities and recommend ways to fix them. **Seller Details:** - **Seller:** [CertiK](https://www.g2.com/sellers/certik) - **Year Founded:** 2018 - **HQ Location:** New York, US - **LinkedIn® Page:** http://www.linkedin.com/company/certik (188 employees on LinkedIn®) ### 10. [Certora](https://www.g2.com/products/certora/reviews) Certora is a leading Web3 security company specializing in formal verification tools and smart contract audits. Their flagship product, the Certora Prover, enables developers to mathematically verify the correctness and security of smart contracts by analyzing bytecode against specified rules. This process ensures that contracts function as intended and are free from critical vulnerabilities. Key Features and Functionality: - Formal Verification: Certora Prover performs comprehensive analysis of smart contract bytecode, checking all possible states and paths to identify potential vulnerabilities. - Automated Analysis: The tool integrates seamlessly into development pipelines, allowing for continuous security checks on every code commit. - Custom Rule Development: Certora's team of formal verification experts can create tailored rules to ensure the security of specific contract functionalities. - Community Engagement: Through audit contests and collaborations with platforms like Code4rena, Certora leverages community expertise to enhance smart contract security. Primary Value and Problem Solved: Certora addresses the critical need for secure and reliable smart contracts in the decentralized finance (DeFi ecosystem. By providing tools that mathematically prove contract correctness, Certora helps developers detect and eliminate bugs before deployment, reducing the risk of exploits and financial losses. This proactive approach to security fosters trust and confidence among users and stakeholders in the blockchain community. **Seller Details:** - **Seller:** [Certora](https://www.g2.com/sellers/certora) - **Year Founded:** 2018 - **HQ Location:** Tel Aviv, IL - **LinkedIn® Page:** https://www.linkedin.com/company/certora/ (80 employees on LinkedIn®) ### 11. [ChainSecurity](https://www.g2.com/products/chainsecurity/reviews) ChainSecurity is a provider of smart contract auditing services, specializing in the security assessment of complex blockchain projects. Since its inception in 2017, the company has collaborated with top-tier DeFi protocols, research institutions, central banks, and large organizations to ensure the integrity and reliability of their smart contracts. By leveraging advanced tools and methodologies, ChainSecurity delivers comprehensive audit reports that detail system descriptions and identify potential vulnerabilities, thereby enhancing the overall security posture of blockchain applications. Key Features and Functionality: - Comprehensive Audits: ChainSecurity conducts in-depth analyses of smart contracts, examining code for security flaws, functional correctness, and adherence to best practices. - Advanced Tooling: Utilizing state-of-the-art tools like Securify, developed in collaboration with ETH Zurich, ChainSecurity offers automated and manual reviews to uncover vulnerabilities. - Diverse Expertise: The company has audited a wide range of projects across various sectors, including DeFi protocols, stablecoins, lending platforms, and decentralized exchanges. - Public Audit Reports: ChainSecurity provides transparent and detailed audit reports, allowing stakeholders to understand the security measures and findings related to their projects. Primary Value and Problem Solved: ChainSecurity addresses the critical need for security in the blockchain ecosystem by identifying and mitigating vulnerabilities within smart contracts. By offering thorough and transparent audits, the company helps organizations build trust with their users, prevent potential exploits, and ensure the safe operation of their blockchain applications. This proactive approach to security fosters a more robust and reliable decentralized financial landscape. **Seller Details:** - **Seller:** [Decentralized Security AG](https://www.g2.com/sellers/decentralized-security-ag) - **Year Founded:** 2017 - **HQ Location:** Zürich, CH - **LinkedIn® Page:** http://www.linkedin.com/company/chainsecurity (26 employees on LinkedIn®) ### 12. [CodeHawks](https://www.g2.com/products/codehawks/reviews) CodeHawks helps protect some of the world's largest protocols. It offers private and public smart contract auditing competitions, supported by a global community of industry-leading security researchers. **Seller Details:** - **Seller:** [Cyfrin](https://www.g2.com/sellers/cyfrin) - **Year Founded:** 2023 - **HQ Location:** Boston, US - **LinkedIn® Page:** https://www.linkedin.com/company/cyfrin/ (20 employees on LinkedIn®) ### 13. [Codezeros](https://www.g2.com/products/codezeros/reviews) Codezeros is a top Blockchain solution and service provider company that reinvents business with Blockchain solutions. Our Blockchain development solutions fortify the business network and make it technically dominant and advanced. Our Blockchain services include Blockchain Development, Oracle Development, VRF Protocol Development, ZK-Rollups Development, Optimistic Rollups Development Launchpad Development, Wallet Development, NFT Development, DAO Blockchain, dApps Development, Modern Whitepaper Solutions, Consensus Forking, Smart Contract Audit, New DLT Solutions, STO Solutions, Tokenomics & Exchange Development,. We serve globally and build innovative and secure digital transformation strategies to meet our client’s business needs. Codezeros is a top Blockchain consultancy firm which develops Blockchain apps. Blockchain technology can be applied to various sectors like in banking, finance, healthcare, insurance, supply chain, enterprise, identity infrastructures, politics, election, voting and in cryptocurrency. Our blockchain web and mobile apps are scalable, secure and trustworthy. **Seller Details:** - **Seller:** [Codezeros](https://www.g2.com/sellers/codezeros) - **Year Founded:** 2015 - **HQ Location:** Ahmedabad, IN - **LinkedIn® Page:** https://www.linkedin.com/company/codezeros/ (101 employees on LinkedIn®) ### 14. [Cyberscope](https://www.g2.com/products/cyberscope/reviews) Cyberscope is one of the leading auditing and consulting firms in the blockchain industry. With more than 500 audits and 100 KYCs in its portfolio, Cyberscope has become the number one trusted security firm on all major launchpads like DxSale, Unicrypt and PinkSale. **Seller Details:** - **Seller:** [Cyberscope](https://www.g2.com/sellers/cyberscope) - **HQ Location:** Rhodes, GR - **LinkedIn® Page:** https://www.linkedin.com/company/cyberscopeio/?originalSubdomain=gr (10 employees on LinkedIn®) ### 15. [CybShield](https://www.g2.com/products/cybshield/reviews) Automate Your Smart Contract Security **Seller Details:** - **Seller:** [CyBirb](https://www.g2.com/sellers/cybirb) - **Year Founded:** 2024 - **HQ Location:** Abu Dhabi, AE - **LinkedIn® Page:** https://www.linkedin.com/company/cybirb/ (1 employees on LinkedIn®) ### 16. [Cyfrin](https://www.g2.com/products/cyfrin/reviews) Cyfrin delivers world-class smart contract security audits, developer tools, and blockchain developer courses to hundreds of thousands of users, partners, and protocols **Seller Details:** - **Seller:** [Cyfrin](https://www.g2.com/sellers/cyfrin) - **Year Founded:** 2023 - **HQ Location:** Boston, US - **LinkedIn® Page:** https://www.linkedin.com/company/cyfrin/ (20 employees on LinkedIn®) ### 17. [Decurity](https://www.g2.com/products/decurity/reviews) Decurity is a company focused on the security of the web3 applications: smart contracts, layer 1 blockchains, sidechains, dApps, etc. We do security audits, continuous security advisory, and security monitoring. **Seller Details:** - **Seller:** [Decentralized Security](https://www.g2.com/sellers/decentralized-security) - **Year Founded:** 2022 - **HQ Location:** Dubai, AE - **LinkedIn® Page:** https://www.linkedin.com/company/decurity (10 employees on LinkedIn®) ### 18. [EtherAuthority](https://www.g2.com/products/etherauthority/reviews) EtherAuthority has been a leading blockchain development company with wide range of expertise ranging from blockchain development to smart contract auditing. So it won’t be wrong to say that EtherAuthority is a one stop solution for complete blockchain needs. If you have any doubt about the potential implementation of Blockchain or about the capabilities of smart contract auditing then do contact us for consultation. We are a team of highly experienced blockchain developers, smart contract auditors and engineers who offer you a forward thinking, fully functional blockchain development. **Seller Details:** - **Seller:** [EtherAuthority](https://www.g2.com/sellers/etherauthority) - **Year Founded:** 2018 - **HQ Location:** Gujarat, IN - **LinkedIn® Page:** https://www.linkedin.com/company/etherauthority (8 employees on LinkedIn®) ### 19. [Hacken](https://www.g2.com/products/hacken-hacken/reviews) Hacken is an end-to-end blockchain security and compliance partner for digital assets. Experts in blockchain, AI-powered offensive security, and regulatory compliance, Hacken has been safeguarding the decentralized ecosystem since 2017. What began as a small group of ethical hackers has grown into a leading force in blockchain security—trusted by governments, regulators, institutions, and over 1,500 blockchain adopters, including the European Commission, ADGM, Ethereum Foundation, MetaMask, and top exchanges like Binance, Bybit, OKX, and Crypto.com. We deliver end-to-end security & compliance solutions that align institutional expectations with crypto-native realities.. With more than 2,300 audits completed and $430B+ in assets verified through Proof of Reserves, Hacken combines deep Web3 expertise with enterprise-grade practices, and a team of certified security engineers. Our services span the entire decentralized stack—from advisory and TLPT to infrastructure protection and compliance readiness. **Seller Details:** - **Seller:** [Hacken](https://www.g2.com/sellers/hacken-843d7ded-2885-428d-9efe-81e9557b001d) - **Year Founded:** 2017 - **HQ Location:** Tallinn city, EE - **Twitter:** @hackenclub (135,269 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/hacken/ (154 employees on LinkedIn®) ### 20. [HackenProof](https://www.g2.com/products/hackenproof/reviews) HackenProof is an expert bug bounty and crowdsourced audit platform that connects companies with a global community of white hat security researchers. Projects launch a program, researchers find and report vulnerabilities, and HackenProof handles triage, validation, and payouts, so security teams only deal with verified, actionable issues. **Seller Details:** - **Seller:** [HackenProof](https://www.g2.com/sellers/hackenproof) - **Year Founded:** 2017 - **HQ Location:** Tallinn, EE - **LinkedIn® Page:** https://www.linkedin.com/company/hackenproof/ (105 employees on LinkedIn®) ### 21. [Hashlock](https://www.g2.com/products/hashlock/reviews) Hashlock is Australia's leading independent blockchain cybersecurity and smart contract auditing firm. They are a highly specialised Blockchain Cybersecurity firm coming from manual analysis, community auditing backgrounds and differentiate by the quantity of findings and being maintaining a high level of collaboration with clients, both in Australia and globally. Reach out to request a smart contract security audit by our leading security researchers, conducted through manual analysis and best practice testing. **Seller Details:** - **Seller:** [Hashlock](https://www.g2.com/sellers/hashlock) - **Year Founded:** 2022 - **HQ Location:** Sydney, AU - **LinkedIn® Page:** https://www.linkedin.com/company/hashlock/ (21 employees on LinkedIn®) ### 22. [Idea Usher](https://www.g2.com/products/idea-usher/reviews) Idea Usher is a top-tier tech solution provider, offering comprehensive, next-gen digital solutions to startups, Fortune 500 companies, and global enterprises. Headquartered in Mohali, India, with additional offices in the USA, UK, and Canada, we deliver innovative technology solutions that empower brands to excel in today’s dynamic digital landscape. Our mission is simple yet powerful: to bridge the gap between vision and reality with technology that drives meaningful impact. With 11+ years of industry experience, we have completed over 1000 projects across 50+ countries, successfully serving a diverse clientele of 500+ businesses worldwide. From AI and Blockchain to Web3 and Tokenization, our services are designed to meet the unique needs of each client, whether it’s building customized apps, modernizing legacy systems, or deploying future-focused tech solutions. Our team consists of 250+ highly skilled experts, including developers, engineers, designers, and digital strategists, who bring a wealth of knowledge to each project. With expertise in 35+ tools and languages, we ensure that our solutions are at the forefront of innovation and functionality. At Idea Usher, we believe in blending sleek design with advanced technology, focusing on human-centered UI/UX to create intuitive, impactful digital experiences. Customer satisfaction is at the core of our approach, and we are dedicated to exceeding expectations with every project. Over the years, we’ve had the privilege of working with renowned brands like BuzzTime, Gold’s Gym, Share My Ride, Payhoo, huBear, and Mediport, among others. Our commitment to quality, collaboration, and innovation has established us as a trusted partner in the tech industry. **Total Reviews:** 1 **Seller Details:** - **Seller:** [Idea Usher](https://www.g2.com/sellers/idea-usher) - **Year Founded:** 2013 - **HQ Location:** Mohali, IN - **LinkedIn® Page:** http://www.linkedin.com/company/idea-usher (150 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Enterprise ### 23. [ImmuneBytes](https://www.g2.com/products/immunebytes/reviews) At ImmuneBytes, In the past two years, we have evaluated more than 175 smart contracts and have maintained an extensive clientele list of more than 145 clients globally. We've had the pleasure of working with a variety of significant blockchain networks, including Fantom, Ethereum, Polygon, Binance, and others. We not just audit a smart contract but also provide extensive audit reports with ratings for bug severity and proofs of concept. In addition to this, we are also known for implementing industry-standard tools for fuzz testing. This makes us stand out from the crowd. **Seller Details:** - **Seller:** [ImmuneBytes](https://www.g2.com/sellers/immunebytes) - **Year Founded:** 2020 - **HQ Location:** New Delhi, IN - **LinkedIn® Page:** https://www.linkedin.com/company/immunebytes (8 employees on LinkedIn®) ### 24. [Kudelski Security](https://www.g2.com/products/kudelski-security/reviews) Kudelski Security is a premier cybersecurity solutions provider, working with the most security-conscious organizations in Europe and across the United States. **Seller Details:** - **Seller:** [Kudelski Security](https://www.g2.com/sellers/kudelski-security) - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) ### 25. [Macro](https://www.g2.com/products/macro-2023-04-28/reviews) Work with your soon-to-be favorite auditing firm. **Seller Details:** - **Seller:** [Macro](https://www.g2.com/sellers/macro-a6db5398-8591-4662-91f2-326681313acd) - **Year Founded:** 2021 - **HQ Location:** New York, US - **LinkedIn® Page:** https://www.linkedin.com/company/macrocom (49 employees on LinkedIn®) ## Parent Category [Security and Privacy Services Providers](https://www.g2.com/categories/security-and-privacy-services)