Over the last few years, blockchain, DeFi, and Web3 have exploded with new projects, new ideas and, unfortunately, fresh security threats. Almost every week we hear about another hack: smart contracts exploited, wallets drained, or protocols brought down by a single overlooked bug. In February 2025, Bybit was hit when attackers stole nearly $1.5 billion in Ethereum by exploiting a wallet transfer vulnerability.
The industry-wide losses are staggering. In just the first half of 2025, hacks and scams drained more than $2.3 billion, almost 66% more than the same time last year. Smart contract bugs and access control mistakes made up most of it, with one category of flaw alone costing projects over $1.6 billion. And while audits do help, they aren’t always enough if done poorly. About 20% of hacked protocols had been audited, and those still accounted for more than 10% of the value lost. That’s why choosing the right audit partner is critical, and in this blog, we’ll walk through the 11 companies leading the way in blockchain security today.
Why Every Blockchain Project Needs an Audit Before Going Live?
1. Stop hacks before they happen
The majority of Web3 hacks come from small errors in smart contracts or overlooked vulnerabilities in the code. Once a project goes live, those flaws can turn into massive losses overnight. A professional review from a reliable blockchain auditing company gives teams the chance to catch these risks early, before attackers find them. It’s far cheaper to fix a bug before launch than to recover from a multimillion-dollar exploit.
2. Protect user funds
In blockchain, trust is everything. If users lose their money due to a security flaw, the project’s reputation can collapse instantly. The best blockchain audit companies don’t just look for weaknesses—they test how secure user wallets, token pools, and integrations really are. This protects the community’s funds and shows users that their money is in safe hands.
3. Stay compliant in regulated markets
Crypto regulations are evolving quickly. From KYC/AML rules to data privacy laws, projects now face a growing set of requirements to operate legally across different regions. Partnering with experienced blockchain audit companies ensures the project is not only technically secure but also aligned with the latest compliance standards. This makes it easier to get listed on exchanges, onboard institutional investors, and expand globally.
4. Earn trust and credibility
Before investors commit capital or exchanges list a token, they often ask: “Has it been audited?” A review by one of the top blockchain security audit companies sends a strong signal to the market that the project is serious about security. This credibility can make the difference between attracting strong partners—or being overlooked.
5. Boost performance
Audits aren’t just about avoiding disasters. Many times, auditors find ways to optimize the code, cut gas fees, or streamline processes. These improvements can make transactions faster, cheaper, and more efficient. In competitive markets like DeFi and NFTs, that edge matters.
6. Build long-term confidence
Security doesn’t end after launch. A project that goes through regular checks with the best blockchain auditing company shows commitment to its users and investors. By tackling weaknesses early and keeping systems strong over time, projects can scale with confidence, knowing they’re less likely to face setbacks from preventable security flaws.
How to Select the Right Blockchain Auditing Partner?
Choosing the right auditor can be just as important as the audit itself. Not all blockchain auditing companies work the same way, and the quality of the review can make or break a project’s security. Here are the key things to look for when deciding who to trust:
1. Experience and portfolio: Always start by checking who they’ve worked with before. The best blockchain audit companies usually have a track record with well-known DeFi protocols, NFT marketplaces, or Layer-1/Layer-2 projects. If an audit firm has secured projects that are still running safely today, that’s a strong sign of credibility.
2. Deep blockchain expertise: Different blockchains come with different risks. An Ethereum DeFi audit is not the same as securing Solana, a cross-chain bridge, or a Layer-2 rollup. Look for a blockchain audit company that has proven expertise in the specific network or ecosystem your project is built on.
3. Audit methodology: A good audit isn’t just about running code through a scanner. The top blockchain security audit companies combine automated scans with manual code reviews, peer checks, and real-world testing. This layered approach ensures that both simple bugs and complex logic flaws are caught.
4. Transparency and clear reports: An audit is only useful if the results are easy to understand and actionable. Look for auditors who deliver detailed yet clear reports—highlighting vulnerabilities, ranking their severity, and giving step-by-step recommendations on how to fix them.
5. Reputation and trust: In an industry where trust is fragile, reputation matters. The best blockchain auditing companies are often recommended by other projects, exchanges, or investors. Reading case studies, testimonials, and community feedback can give you a sense of how reliable they are.
6. Pricing, speed, and support: Cost and turnaround time will vary depending on project size and complexity. But beyond the price tag, the real value is in after-audit support. The right partner won’t just hand over a report and disappear; they’ll guide you through fixes and, if needed, re-audit the project before launch.
Top 11 Blockchain Auditing Companies
We selected these blockchain auditing companies based on a mix of industry reputation, proven track record, technical expertise, and service breadth. Each firm has been consistently recognized in independent rankings, has audited high-value protocols across DeFi, Layer 1/2 networks, and NFT platforms, and is trusted by leading projects in the Web3 ecosystem.
1. Ment Tech Labs Pvt. Ltd.
4.2 (30+ Reviews)
Overview: Ment Tech Labs provides blockchain, Web3, and AI solutions. They offer smart contract development with rigorous auditing for DeFi, NFTs, and enterprise applications across chains like Ethereum, BNB Chain, Polygon, etc. Ment Tech Labs They also do blockchain consulting, full-stack development, and Web3 infrastructure work.
What sets them apart is their ability to provide both end-to-end development and security acting as a one-stop shop for blockchain projects rather than just auditors.
2. CertiK
Overview: CertiK is a leading blockchain security firm known for combining formal verification, static analysis, and manual review. They also run the “Skynet” continuous monitoring system to watch deployed contracts. Their reputation and brand confidence often help projects in securing investor trust.
What sets them apart is their strong brand reputation projects audited by CertiK often see an instant boost in investor trust due to their industry visibility.
3. Hacken
Overview: Hacken offers end-to-end crypto and blockchain security including smart contract audits, penetration testing, and bug bounty programs. They have audited many projects and focus on holistic security assessments beyond just code.
What sets them apart is their holistic ecosystem approach, combining audits with real-time monitoring and community-driven security efforts.
4. OpenZeppelin
Overview: OpenZeppelin is well-known for its open-source smart contract libraries & security tools. Their team also performs audits and security reviews, especially for EVM-based protocols, leveraging their deep knowledge of secure contract patterns.
What sets them apart is their role as the foundation for most Ethereum-based projects, providing both standards (ERCs) and audits.
5. Trail of Bits
Overview: Trail of Bits is a highly technical security firm known for deep audits, fuzzing, static & dynamic analysis, threat modeling, and research. They tend to serve higher-complexity systems and protocol-level components.
What sets them apart is their role as the foundation for most Ethereum-based projects, providing both standards (ERCs) and audits.
6. Quantstamp
Overview: Quantstamp focuses on DeFi & NFT audits, cross-chain security, and risk assessments. They combine manual review, automated tooling, and have audited many high-value contracts across multiple ecosystems.
What sets them apart is their flexibility across ecosystems and their involvement in high-value, cross-chain security for protocols like Ethereum 2.0 and Solana.
7. SlowMist
Overview: SlowMist is a security company with strong presence in Asia. They provide contract audits, infrastructure reviews, incident response, threat intelligence, and real-time monitoring.
What sets them apart is their strong presence in Asia and their reputation for post-deployment monitoring through services like MistTrack, which tracks stolen funds and malicious wallets.
8. Hashlock
Overview: Hashlock is a smart contract auditing & cybersecurity firm supporting many ecosystems. Their audits include manual reviews, vulnerability analysis, and simulated attacks. They aim to provide quick quotes and transparent audit processes.
What sets them apart is their transparency and quick turnaround times, making them attractive for emerging Web3 startups that need fast, high-quality audits.
9. Halborn
Overview: Halborn provides enterprise-level security services for blockchain systems: audits, red teaming, advisory, and defense against complex attacks. They are positioned for large or high-stakes projects.
What sets them apart is their focus on long-term client relationships and ability to handle complex, large-scale blockchain infrastructures beyond just smart contracts.
10. PeckShield
Overview: PeckShield is a blockchain security firm active in Asia; they combine analytics, threat monitoring, and smart contract audits. Their strength lies in combining audit + post-deployment monitoring and blockchain forensics.
What sets them apart is their real-time hack monitoring and reporting — they are often the first to flag active exploits and track stolen funds, giving them a unique edge in threat intelligence.
11. ChainSecurity
Overview: ChainSecurity has been active since ~2017, working with DeFi protocols and research institutions. They publish public audit reports and focus on formal verification, rigorous code review, and security for complex smart contracts.
What sets them apart is their academic rigor and precision, having been spun out of ETH Zurich research making them a go-to choice for protocols handling billions in TVL.
Quick Comparison: Blockchain Auditing Companies
| Company | Core Strength | Best For | Unique Edge |
| Ment Tech Labs | End-to-end development + auditing (one-stop shop) | Projects needing both development + audit in one place | One-stop shop for blockchain development + auditing |
| CertiK | Strong brand reputation, investor trust, continuous monitoring (Skynet) | Projects wanting credibility boost + investor trust | Biggest name recognition in audits, boosts trust instantly |
| Hacken | Holistic security ecosystem, bug bounties, real-time monitoring | Teams seeking community-driven + holistic security | Combines audits with monitoring + bug bounty programs |
| OpenZeppelin | Foundational Ethereum libraries + secure audit expertise | Projects on Ethereum needing trusted libraries + audits | Most widely used Ethereum standards + security tools |
| Trail of Bits | Deep technical expertise, fuzzing, threat modeling, protocol security | Highly complex systems, protocol-level reviews | Top-tier expertise for complex, critical blockchain layers |
| Quantstamp | Cross-chain flexibility, DeFi/NFT audits, Ethereum 2.0 & Solana | Cross-chain, DeFi, NFT platforms with high-value work | High-value, cross-chain audits with global recognition |
| SlowMist | Asian market leader, threat intelligence, MistTrack fund tracing | Projects in Asia needing monitoring + post-deployment | Known for MistTrack: real-time stolen fund tracing |
| Hashlock | Transparency, fast quotes, quick turnaround audits | Startups needing fast, transparent audits | Fast, transparent, startup-friendly process |
| Halborn | Enterprise-level, red teaming, long-term client focus | Enterprises & large-scale blockchain infrastructures | Enterprise focus with advanced security strategies |
| PeckShield | Hack monitoring, real-time exploit alerts, forensics | Teams needing threat monitoring + hack forensics | First responders in hack detection + fund tracking |
| ChainSecurity | Academic rigor, formal verification, ETH Zurich roots | DeFi protocols & projects needing academic precision | ETH Zurich spin-off, highly rigorous verification methods |
Why Should You Choose Ment Tech for Blockchain Auditing?
Choosing Ment Tech as your blockchain auditing partner means working with a team that understands both the development and the security side of Web3.
1. Tailored Audit Approach
Every blockchain project is different, and Ment Tech recognizes that. Their audits aren’t one-size-fits-all they take into account your project’s unique architecture, goals, and risks. This tailored approach ensures that vulnerabilities aren’t just flagged but understood in the context of your actual use case.
2. Proven Blockchain Expertise
With experience across DeFi, NFT marketplaces, exchanges, and infrastructure projects, Ment Tech has worked with hundreds of clients worldwide. Their team has hands-on knowledge of Ethereum, Solana, Layer 2s, and cross-chain platforms, making them one of the best blockchain auditing companies for diverse ecosystems.
3. Strong Security Methodology
Ment Tech combines manual code reviews with automated analysis, penetration testing, and compliance checks. This layered methodology helps them uncover not just obvious bugs but also hidden vulnerabilities and logic flaws that automated tools often miss.
4. Commitment Beyond the Audit
An audit report alone isn’t enough if a team is left struggling with fixes. Ment Tech supports projects even after the report is delivered guiding developers through remediation, scheduling re-audits after major upgrades, and offering continuous monitoring to keep systems secure.
5. Trusted by Global Clients
Ment Tech’s reputation is built on its global portfolio, having secured projects in financial services, token ecosystems, and blockchain infrastructure. Their standing as a reliable blockchain security audit company comes from consistently delivering results that build trust with users and investors alike.
In short, Ment Tech is a long-term security partner that helps projects launch confidently and stay secure as they scale.
Conclusion
At Ment Tech, we believe that an audit is not a checkbox or a one-time fix it’s the foundation of a secure and sustainable blockchain project. A strong audit does more than uncover vulnerabilities; it builds trust with your users, assures compliance with evolving regulations, and strengthens the long-term resilience of your ecosystem.
Security in blockchain is not a destination but an ongoing journey. With every upgrade, integration, or market shift, new risks can emerge. That’s why choosing the right blockchain audit company is so important.
If you’re preparing to launch. Don’t wait for a breach to expose what could have been prevented. Partner with Ment Tech today and take the first step toward a secure, trusted, and future-ready blockchain project.
Frequently Asked Questions:
There are several kinds: smart contract audits (checking code for vulnerabilities), protocol audits (looking at the whole blockchain system), infrastructure audits (covering wallets, APIs, nodes), compliance audits (checking if a project meets legal requirements), penetration testing (simulating attacks), and continuous audits (ongoing monitoring). The type you need depends on your project’s scope.
It varies. A simple smart contract audit might take a week or two, while complex protocols can take several weeks or even months. Timelines depend on the size of the codebase, the complexity of the project, and the auditor’s workload.
No audit can promise absolute security. What it does provide is a high level of confidence by identifying and fixing known vulnerabilities. Combined with ongoing monitoring, bug bounty programs, and re-audits after upgrades, audits dramatically reduce risks.
Yes. Even small projects can be targets for exploits. In fact, early audits are often cheaper and easier to conduct since the codebase is smaller. Skipping audits at the start can lead to bigger problems and higher costs later on.
Look for a firm with proven experience in your blockchain ecosystem (Ethereum, Solana, Layer 2s, etc.), a solid portfolio of past clients, transparent reporting practices, and ongoing support. Reputation in the industry also matters; a trusted auditor can boost investor and user confidence.
