AI-Augmented DeFi Security Audits to Protect Your Assets and Reputation
Don't let a single vulnerability drain your liquidity and destroy user trust.
Our comprehensive audits combine expert manual review with powerful AI to secure your protocol before launch.
Trusted by innovative startups and global enterprises
In the world of decentralized finance, your smart contract is your vault. A single, undiscovered flaw can lead to a catastrophic loss of funds and an irreversible blow to your reputation. A professional DeFi security audit is not an optional expense; it's the most critical investment you can make in your project's future. It provides the technical validation needed to earn user trust, the due diligence required by investors, and the peace of mind to launch with confidence. We go beyond simple bug hunting, analyzing your code, architecture, and economic model to identify and eliminate threats before they can be exploited.
Why Partner with Errna for DeFi Security?
We provide more than just a report. We deliver certainty, confidence, and a long-term security partnership to safeguard your protocol's future.
AI-Augmented, Expert-Driven
We combine the best of both worlds. Our AI-powered scanners analyze millions of lines of code for known vulnerabilities in minutes, while our seasoned security experts focus on complex business logic, novel attack vectors, and potential economic exploits that automated tools miss.
CMMI Level 5 & ISO 27001 Certified
Security is in our DNA. Our processes are appraised at CMMI Level 5, the highest level of process maturity, and certified under ISO 27001 for information security management. This ensures a rigorous, repeatable, and transparent audit process every time.
Full-Lifecycle Security Partner
Our engagement doesn't end with a report. We provide detailed remediation guidance, re-audit your fixes, and offer ongoing security services like 24/7 incident response and continuous monitoring to protect your protocol as it evolves.
Focus on Economic & Business Logic
A contract can be technically perfect but economically flawed. We go beyond the code to analyze your protocol's economic model, identifying potential for oracle manipulation, flash loan exploits, and other business logic vulnerabilities that can drain your treasury.
Transparent & Actionable Reporting
You receive a comprehensive report that is clear, concise, and actionable. We classify vulnerabilities by severity, provide proof-of-concept exploits, and offer concrete code recommendations, enabling your team to fix issues quickly and effectively.
Vetted, In-House Experts
We don't use freelancers. Your audit is conducted by our full-time team of certified ethical hackers and blockchain security specialists, ensuring accountability, consistency, and deep expertise.
20+ Years of Security Experience
While DeFi is new, enterprise-grade security is not. We bring over two decades of experience in securing complex systems for clients ranging from startups to Fortune 500 companies, applying time-tested security principles to the unique challenges of the blockchain.
Collaborative & Developer-Friendly
We work *with* your team, not against them. Our process is collaborative, with clear communication channels and dedicated sessions to walk your developers through our findings, ensuring they understand the risks and how to mitigate them.
Confidentiality Guaranteed
We understand the sensitivity of your project. All engagements are covered by a strict Non-Disclosure Agreement (NDA). Your code and business logic are treated with the utmost confidentiality from start to finish.
Our Comprehensive DeFi Security Audit Services
Our audit is a multi-layered process designed to secure your entire protocol, from individual lines of code to the overarching economic design. We tailor our approach to your specific needs, ensuring every potential attack vector is identified and mitigated.
Smart Contract Audit
This is the core of our service. We perform a line-by-line manual review of your Solidity, Rust, or other smart contract code, combined with advanced automated analysis. We hunt for common and novel vulnerabilities to ensure your code behaves exactly as intended.
- Detects flaws like reentrancy, integer overflows, and access control issues.
- Verifies adherence to best practices and coding standards (e.g., SWC Registry).
- Provides gas optimization recommendations to improve efficiency.
Blockchain Architecture Review
A secure protocol is more than just secure contracts. We analyze the overall design of your system, including on-chain and off-chain components, to identify architectural weaknesses that could be exploited.
- Evaluates the security of your data flow and component interactions.
- Assesses the risks of centralization in your oracle, admin key, or off-chain infrastructure.
- Ensures your upgradeability patterns (e.g., proxies) are implemented securely.
Economic Model & Business Logic Audit
We simulate various market conditions and attack scenarios to test the economic soundness of your protocol. Our goal is to uncover design flaws that could be exploited to drain value, even if the code itself is bug-free.
- Identifies vulnerabilities to flash loan attacks and oracle manipulation.
- Analyzes tokenomics for potential inflationary or deflationary spirals.
- Stress-tests governance mechanisms and incentive structures.
Penetration Testing
We take an adversarial approach, actively trying to hack your protocol in a controlled testnet environment. This practical testing uncovers vulnerabilities that might be missed in a purely theoretical code review.
- Simulates real-world attack scenarios to test your protocol's defenses.
- Tests the effectiveness of your incident response and monitoring capabilities.
- Provides a realistic assessment of your protocol's resilience against a determined attacker.
And 11 More In-Depth Services...
Our expertise covers every facet of DeFi security. Click "Get a Free Consultation" to discuss our full suite of services, including:
- Formal Verification
- Off-Chain & dApp Security Audit
- Gas Optimization Analysis
- Upgradeability & Governance Review
- Tokenomics Audit
- Incident Response Plan Review
- Cloud & Infrastructure Security
- Compliance Readiness Assessment (KYC/AML)
- Re-Auditing & Remediation Support
- AI-Powered Threat Modeling
Our Audit Process: A Six-Step Path to Protocol Security
We believe in a transparent, methodical, and collaborative approach. Our CMMI Level 5-appraised process provides maximum visibility and delivers a thorough, actionable analysis.
Discovery & Scoping
It all starts with a conversation. We meet with your team to understand your protocol's architecture, business goals, and specific security concerns. We review your documentation, whitepaper, and codebase to define a precise scope, timeline, and quote for the engagement.
AI-Powered Automated Analysis
Once engaged, we immediately run your codebase through our suite of advanced static and dynamic analysis tools. Our proprietary AI engine, combined with industry-leading scanners like Slither and Mythril, performs an initial sweep to identify common vulnerabilities and flag high-risk areas for our manual reviewers.
Deep-Dive Manual Review
This is where our human expertise shines. Our team of security auditors performs a meticulous, line-by-line review of your code. They focus on the complex business logic, architectural design, and economic incentives that automated tools cannot comprehend, searching for novel and context-specific flaws.
Collaborative Vulnerability Triage
We don't wait until the end to share our findings. As we discover potential vulnerabilities, we communicate them to your team in real-time via a shared channel (like Slack). This allows your developers to ask questions, provide context, and begin working on fixes immediately, accelerating the entire process.
Comprehensive Reporting
Upon completion of the review, we deliver a detailed and actionable report. Each finding is clearly explained, classified by severity, and accompanied by a proof-of-concept and specific code recommendations for remediation. We also provide an executive summary for non-technical stakeholders.
Remediation & Re-Audit
We schedule a debriefing call to walk your team through the report. Once you have implemented the recommended fixes, we perform a final re-audit to verify that all vulnerabilities have been successfully resolved. You receive a final, clean report to share with your community as a certificate of security.
Proven Expertise in Action
Our audits deliver tangible results, protecting millions in assets and enabling secure innovation. Explore our success stories.
Preventing a Catastrophic Exploit in a Next-Generation Lending Protocol
A well-funded startup, "LendFi", was developing an innovative lending protocol with a unique liquidity mechanism. With $50M in TVL projected at launch, a security flaw would be devastating. They needed a top-tier audit to ensure the safety of user funds and secure confidence before their mainnet launch.
"Errna's audit was the most valuable investment we made. They discovered a critical, non-obvious flaw in our interest rate calculation that could have been exploited to drain our entire treasury."
- Alex Royce, Founder, LendFiOur Solution:
We deployed a dedicated team of three experts to conduct an AI-powered scan, deep manual review, and economic model simulation. By establishing a shared Slack channel for real-time communication, we provided immediate, actionable guidance, allowing the LendFi team to start fixing issues before the final report was even delivered.
Providing Technical Certainty for a $10M VC Investment
"CryptoVentures Capital," a leading Web3 investment firm, was in the final stages of a $10M Series A investment into a promising P2E gaming platform. The VC needed a definitive, independent security audit to validate the technical integrity of the platform before wiring the funds.
"Errna's audit report is now a mandatory part of our due diligence checklist. The clarity and depth of their analysis allowed our investment committee to approve the deal with full confidence."
- Amelia Norton, Principal, CryptoVentures CapitalOur Solution:
We produced a two-part report: a concise executive summary for investment partners and a detailed technical report for analysts. By using a standard DASP 1-10 severity scoring system and holding a direct debrief with the partners, we translated complex technical risk into a clear business assessment.
Fortifying a Live DEX Against an Emerging Threat
"CoinVerse Exchange," a top-10 DEX with over $500M in daily volume, proactively engaged us for an emergency penetration test after a novel exploit was used against a competitor. They needed to know if they were vulnerable before attackers turned their attention to them.
"The speed and skill of the Errna team were remarkable. Within 48 hours, they had replicated the novel attack in our test environment and provided a clear patch. They gave us a shield."
- Carter Fleming, CTO, CoinVerse ExchangeOur Solution:
We deployed our emergency response team within hours. Taking a purely adversarial approach on a forked testnet, we successfully replicated the exploit and developed a proof-of-concept. We then convened a "war room" call with their developers to demonstrate the exploit and collaborate on a patch in real-time.
Our Auditing Arsenal: Technology & Tools
We leverage a powerful combination of industry-standard tools and proprietary AI to ensure comprehensive audit coverage and find more vulnerabilities, faster.
What Our Clients Say
Trust is earned through results. Hear directly from the founders, investors, and CTOs who rely on our security expertise.
"Errna's audit was incredibly thorough. They didn't just find bugs; they questioned our economic assumptions and helped us build a much more resilient protocol. Their report was the key to closing our Series A round. We consider them a core part of our security team."
"We don't invest in a DeFi project until the Errna team has audited it. Their reports are the industry standard for technical due diligence. They are clear, comprehensive, and give us the confidence we need to invest in this high-stakes environment."
"Integrating new DeFi protocols is one of our biggest security challenges. Errna's architecture review and penetration testing services are essential to our listing process. They consistently identify critical risks that protect our platform and our users' funds."
"The team at Errna went above and beyond. Their AI-powered tools found a subtle vulnerability in our staking contract that other auditors might have missed. The collaborative process and clear remediation advice made fixing the issue straightforward. Highly recommend."
"As a developer, I was impressed by the depth of their code review. They provided actionable, non-generic feedback and even suggested gas optimizations that improved our user experience. It felt like a true peer review with seasoned experts."
"Errna helped us navigate the complex security landscape of integrating blockchain technology into our existing payment infrastructure. Their understanding of both traditional FinTech security and DeFi-specific risks was invaluable. They are a trusted partner."
The Errna Audit vs. Standard Audits
Not all audits are created equal. Understand the difference between a true security partnership and a basic checklist review.
| Feature | The Errna AI-Augmented Audit | Standard "Checklist" Audit |
|---|---|---|
| Methodology | Hybrid: AI-powered analysis + deep manual expert review. | Primarily manual or basic tool-based. |
| Scope | Holistic: Code, architecture, economic model, and off-chain components. | Focused solely on smart contract code. |
| Focus | Proactive threat hunting & business logic validation. | Finding known, common vulnerabilities. |
| Process | Collaborative & iterative with real-time feedback. | "Black box" process with a single report at the end. |
| Team | In-house, certified security experts (CMMI 5, ISO 27001). | Often outsourced to anonymous freelancers. |
| Outcome | A hardened, resilient protocol and a long-term security partner. | A PDF report and a false sense of security. |
Frequently Asked Questions
The cost of an audit depends on the complexity and size of your codebase. A simple, single smart contract audit might start around $8,000, while a full audit of a complex lending protocol could be $50,000 or more. We provide a firm, fixed-price quote after our initial scoping call.
Timelines typically range from one week for a small project to four to six weeks for a large, complex protocol. We work with you to establish a timeline that aligns with your launch schedule without compromising the integrity of the audit.
To start, we typically need access to your code repository (e.g., a private GitHub repo), any existing technical documentation, and your whitepaper. We'll also schedule a discovery call with your lead developers to understand the project in depth.
We notify you immediately through our shared, secure communication channel. We provide a detailed explanation of the vulnerability and work with your team to develop and verify a patch. Our goal is to help you fix issues, not just find them.
Absolutely. Upon successful remediation of all critical and high-severity findings, we provide a final, public-facing report that you can share with your community and investors as a testament to your commitment to security.
Yes. While we have deep expertise in the EVM (Ethereum, BSC, Avalanche, etc.), our team is also experienced in auditing protocols on other chains like Solana (Rust), Polkadot (Substrate), and Cosmos.
Ready to Secure Your Place in the Future of Finance?
A single exploit can undo years of hard work. Partner with a security leader that combines deep expertise with next-generation AI to provide the certainty you need to launch, scale, and thrive.
Schedule Your Free Consultation