AI-Augmented Blockchain Security Audits That Prevent Catastrophic Loss
Don't become another headline.
Our multi-layered audit process combines automated analysis with elite manual review to secure your code, protocol, and reputation.
Why Partner With Errna for Your Security Audit?
In a space where a single vulnerability can erase millions in value and years of trust, your choice of security partner is paramount. We go beyond surface-level scans to provide a holistic security posture assessment that protects your assets, users, and future.
AI-Augmented Accuracy
Our proprietary AI tools scan for thousands of known vulnerabilities and complex anti-patterns, providing a baseline of coverage that allows our human experts to focus on nuanced logic flaws and novel attack vectors.
Elite Adversarial Experts
Our auditors are not just developers; they are ethical hackers with an adversarial mindset. They think like attackers to find the exploits others miss, drawing on experience from auditing hundreds of diverse protocols.
Full-Stack Protocol Review
We don't just audit your smart contracts. We analyze the entire system: your blockchain architecture, dApp, off-chain components, and economic model to identify systemic risks and cross-layer vulnerabilities.
Actionable & Prioritized Reporting
You won't receive a vague, unhelpful report. We provide clear, prioritized findings with concrete code examples and remediation guidance, enabling your team to fix what matters most, fast.
CMMI 5 & ISO Certified Process
Our audit methodology is governed by the highest standards of process maturity and security (CMMI Level 5, ISO 27001, SOC 2). This ensures a repeatable, thorough, and transparent engagement every time.
Post-Audit Partnership
Our engagement doesn't end with the report. We offer remediation verification, continuous monitoring integration, and strategic security advice to serve as your long-term partner in a constantly evolving threat landscape.
Comprehensive Blockchain Security Services
Our audit services cover every layer of your Web3 stack. From the core smart contracts to the economic incentives that govern your protocol, we provide the clarity and assurance you need to build with confidence.
The bedrock of your application. We perform a line-by-line manual review and automated analysis of your Solidity, Rust, or other smart contract code to identify vulnerabilities before they are deployed.
- Detect common flaws like reentrancy, integer overflows, and access control issues.
- Ensure adherence to best practices and standards like ERC-20, ERC-721, and ERC-1155.
- Provide gas optimization suggestions to reduce transaction costs for your users.
We assess the security of your entire decentralized application, including front-end, back-end services, and smart contract interactions, to prevent exploits that target the user interface or off-chain logic.
- Identify vulnerabilities like front-running, phishing risks, and insecure key management.
- Analyze interactions between your dApp and third-party protocols or APIs.
- Secure the connection between the user's wallet and your application logic.
Specialized audits for the unique challenges of non-fungible tokens and their trading platforms. We secure your minting logic, metadata handling, and royalty mechanisms.
- Prevent common NFT exploits like fraudulent minting and metadata manipulation.
- Secure auction and bidding logic to ensure fair and transparent sales.
- Verify compliance with standards like EIP-2981 for royalty payments.
We conduct in-depth security assessments of software and hardware wallets, focusing on private key management, transaction signing, and resistance to both physical and remote attacks.
- Analyze cryptographic implementations and key generation processes.
- Assess defenses against malware, phishing, and side-channel attacks.
- Review code for both client-side and server-side components.
A dedicated review focused on minimizing the gas consumption of your smart contracts. This audit improves user experience and makes your protocol more competitive and efficient.
- Identify inefficient code patterns and data structures.
- Recommend specific code changes to reduce deployment and runtime costs.
- Benchmark performance to quantify potential savings.
A holistic review of your entire DeFi ecosystem, including lending platforms, DEXs, and yield farming protocols. We focus on economic logic, oracle manipulation, and complex contract interactions.
- Model potential economic exploits and flash loan attacks.
- Assess the security and reliability of price oracles and data feeds.
- Analyze governance mechanisms and admin control risks.
For teams building foundational infrastructure, we audit the core protocol layer. This includes consensus mechanisms, cryptographic primitives, peer-to-peer networking, and virtual machine implementations.
- Analyze consensus algorithms for vulnerabilities like long-range attacks.
- Review cryptographic libraries for implementation flaws.
- Assess the security of the node software and network communication layer.
Bridges are high-value targets. Our specialized audit focuses on the unique risks of interoperability protocols, including validator security, message passing, and asset locking/minting mechanisms.
- Examine the security of the consensus or multi-sig mechanism securing the bridge.
- Audit the logic for asset transfers between chains to prevent double-spending or theft.
- Assess risks related to chain reorganizations and finality assumptions.
We analyze your on-chain governance system to protect against malicious proposals, voter manipulation, and hostile takeovers of the protocol's administrative functions.
- Review the proposal lifecycle, from creation to execution.
- Assess the security of voting mechanisms and token delegation.
- Analyze timelock contracts and emergency administrative powers.
We simulate real-world attacks against your entire deployed system, including web applications, APIs, and cloud infrastructure, to identify vulnerabilities before malicious actors do.
- Conduct both black-box and white-box testing based on your needs.
- Attempt to exploit identified vulnerabilities to demonstrate impact.
- Provide a detailed report of attack paths and remediation steps.
For mission-critical contracts, we use mathematical methods to prove that your code behaves exactly as intended and is free from certain classes of vulnerabilities. This offers the highest level of assurance.
- Define critical properties and invariants of your system.
- Use automated tools and manual proofs to verify these properties.
- Ideal for core financial logic, vaults, and token contracts.
We analyze the incentive structures and data dependencies of your protocol to identify potential for economic manipulation, such as oracle price attacks or governance exploits.
- Simulate various market conditions to test protocol resilience.
- Assess the security, decentralization, and reliability of your data oracles.
- Identify and mitigate risks related to flash loans and other forms of capital leverage.
Security is a continuous process. We offer audits for projects at any stage, from pre-launch code reviews to post-launch assessments of deployed systems and subsequent upgrades.
- Engage early in the development lifecycle to build security in from the start.
- Conduct delta audits on new features and code changes.
- Perform regular health checks on mature, running protocols.
Preparation is the best defense. We help you develop a comprehensive plan to detect, respond to, and recover from a security incident, minimizing potential damage and downtime.
- Establish clear roles, responsibilities, and communication channels.
- Develop technical procedures for pausing contracts and mitigating losses.
- Conduct tabletop exercises to test and refine your response plan.
We assess your platform's architecture and processes for adherence to regulatory requirements, helping you navigate the complex landscape of financial compliance in the blockchain space.
- Review data handling for compliance with privacy laws like GDPR.
- Assess the implementation and effectiveness of your KYC/AML solutions.
- Provide guidance on designing systems for regulatory reporting.
Our Meticulous 5-Step Audit Process
We've refined our methodology through hundreds of engagements to deliver a process that is both rigorously thorough and highly efficient, providing maximum security insight with minimal disruption to your development roadmap.
1. Scoping & Discovery
We begin with a deep dive into your project's architecture, business logic, and intended functionality. This collaborative phase ensures we understand your specific security concerns and threat model, allowing us to tailor the audit for maximum relevance and impact.
2. AI-Powered Automated Analysis
Our proprietary suite of static and dynamic analysis tools performs an initial comprehensive scan of your codebase. This step efficiently identifies common vulnerabilities, code quality issues, and deviations from best practices, creating a solid foundation for our manual review.
3. In-Depth Manual Review
This is where our expertise shines. Our elite auditors conduct a line-by-line review of your code, focusing on complex business logic, potential economic exploits, and novel attack vectors that automated tools cannot detect. We simulate adversarial scenarios to test the resilience of your system.
4. Collaborative Reporting
We deliver a detailed, confidential report that clearly outlines all findings, categorized by severity. Each finding includes a technical description, proof-of-concept exploit, and actionable recommendations for remediation. We review this report with your team to ensure complete understanding.
5. Remediation & Verification
Our partnership continues after the initial report. We provide support as your team implements fixes and then conduct a thorough re-audit of the updated code to verify that all vulnerabilities have been successfully and securely resolved, issuing a final, public-facing report if desired.
Proven Results in Securing High-Value Protocols
Securing a Cross-Chain Lending Protocol
Industry: Decentralized Finance (DeFi)
Client Overview: A well-funded startup building an innovative cross-chain lending and borrowing platform designed to unify liquidity across multiple L1 ecosystems. Their protocol involved complex logic for asset custody, interest rate calculation, and cross-chain messaging.
The Problem: Before their mainnet launch, the client needed absolute assurance that their smart contracts were free from critical vulnerabilities that could lead to the loss of user funds, especially given the high risks associated with cross-chain bridges and complex financial logic.
Key Challenges:
- Auditing novel smart contracts with no existing precedent.
- Securing the bridge component, a notorious target for attackers.
- Analyzing the economic model for potential flash loan manipulation.
- Ensuring correct state updates across multiple, distinct blockchains.
Our Solution:
We assembled a dedicated team of DeFi and bridge security experts who performed a multi-faceted audit over three weeks.
- Conducted deep manual review of all Solidity contracts on the EVM chain and Rust contracts on the Cosmos chain.
- Performed formal verification on the core vault contract to mathematically prove its fund-holding integrity.
- Developed custom economic models to simulate flash loan attacks against their oracle and liquidation mechanisms.
- Identified a critical reentrancy vulnerability in the lending contract that could have led to complete fund drainage.
"Errna's audit was the most thorough technical review we've ever experienced. They didn't just find bugs; they understood our business logic and helped us make the entire protocol more resilient. Their discovery of the reentrancy flaw saved our company."
Alex Royce, CTO, DeFi Lending ProtocolHardening a Generative Art NFT Marketplace
Industry: NFTs & Digital Collectibles
Client Overview: An established digital art platform launching a new, on-chain generative art marketplace. The platform needed to handle high-traffic minting events, secure bidding mechanisms, and guarantee fair and random distribution of NFT traits.
The Problem: The client's reputation depended on a flawless launch. They were concerned about bots sniping rare NFTs, exploits in the minting process allowing users to get more than their share, and vulnerabilities in their auction contract that could lock up bids or NFTs.
Key Challenges:
- Ensuring true on-chain randomness for trait generation.
- Protecting against front-running during high-demand mints.
- Securing the signature-based "gasless" listing mechanism.
- Auditing compliance with multiple NFT and royalty standards (ERC-721A, EIP-2981).
Our Solution:
Our NFT security specialists conducted a targeted audit focused on the unique attack surfaces of NFT platforms.
- Analyzed their use of Chainlink VRF for on-chain randomness, recommending improvements to prevent miner influence.
- Identified a signature replay vulnerability in their private sale contract that would have allowed whitelisted users to mint multiple times.
- Provided gas optimization strategies for their batch minting function, saving users thousands in fees.
- Ensured their royalty contract was correctly implemented to be compatible with all major secondary marketplaces.
"The Errna team understood the NFT space inside and out. They went beyond standard checks and helped us build a fairer, more efficient, and much more secure platform for our artists and collectors. The launch was seamless thanks to their diligence."
Camila Gilmore, Founder, Art NFT PlatformValidating an Enterprise Supply Chain Blockchain
Industry: Logistics & Manufacturing
Client Overview: A Fortune 500 logistics company implementing a private, Hyperledger Fabric-based blockchain to track high-value goods from factory to consumer. The system was designed to provide an immutable record of custody and prevent counterfeiting.
The Problem: The client needed to ensure the integrity and confidentiality of their supply chain data. They required a thorough audit of their chaincode (smart contracts) and the overall network configuration to prevent unauthorized access, data tampering, and ensure compliance with internal security policies.
Key Challenges:
- Auditing complex access control logic for multiple stakeholders (manufacturers, shippers, retailers).
- Ensuring data privacy between competing participants on the same network.
- Validating the security of off-chain data storage and API integrations.
- Assessing the resilience of the network against insider threats.
Our Solution:
Our enterprise blockchain experts performed a comprehensive security assessment of their Hyperledger Fabric implementation.
- Conducted a manual review of all Go-based chaincode, focusing on endorsement policies and access control.
- Identified a flaw in their channel configuration that could have allowed a malicious participant to access sensitive data from a competitor.
- Performed penetration testing on the APIs that connected the blockchain to their existing ERP systems.
- Provided a detailed network architecture review with recommendations for hardening nodes and certificate authorities.
"Errna provided the enterprise-level security validation we needed. Their understanding of Hyperledger Fabric was exceptional, and their findings were critical in helping us secure our multi-billion dollar supply chain network before it went live. They are a trusted partner."
Andrew Harding, VP of Innovation, Logistics CorpTechnologies & Platforms We Secure
Our expertise spans the entire Web3 ecosystem. We have deep, hands-on experience auditing projects built on all major blockchains, smart contract languages, and infrastructure components.
What Our Clients Say
"The level of detail in Errna's audit report was incredible. They found a subtle but critical flaw in our liquidation logic that could have been catastrophic. Their team is professional, responsive, and truly world-class. We won't launch a new product without their sign-off."
Lead Protocol Engineer, ScaleUp DeFi
"As a VC, we require all our portfolio companies to undergo a rigorous security audit. Errna is our go-to partner. They consistently deliver high-quality, unbiased reports that give us the confidence to invest and our founders the roadmap to build securely."
Principal, Web3 Ventures
"We were on a tight deadline for our mainnet launch. The Errna team integrated seamlessly with our development sprints, providing real-time feedback that allowed us to patch vulnerabilities without delaying our roadmap. Their process is built for speed and efficiency."
Head of Engineering, GameFi Studio
"We engaged Errna for a penetration test of our entire exchange infrastructure. They identified several critical vulnerabilities in our off-chain systems that we had completely overlooked. Their full-stack approach is invaluable for any serious crypto project."
Chief Security Officer, Crypto Exchange
"The economic modeling portion of the audit was a game-changer. Errna's team stress-tested our protocol's incentive mechanisms and identified a potential governance attack vector. Their insights went far beyond simple code review."
Founder, Stablecoin Protocol
"As a non-technical founder, I appreciated how clearly the Errna team communicated complex risks. They enabled me to understand the security posture of our project and make informed decisions. They are a true partner, not just a vendor."
CEO, NFT Ticketing Platform
Frequently Asked Questions
The cost of an audit depends on the complexity and size of the codebase. A simple ERC-20 token might be a few thousand dollars, while a complex DeFi protocol can range from $30,000 to over $100,000. We provide a custom quote after an initial scoping call where we review your project's architecture and specific needs. Remember, the cost of an audit is an investment that pales in comparison to the potential loss from a single exploit.
The timeline is also dependent on complexity. A typical smart contract audit takes between 2 to 4 weeks. This includes the initial review, report generation, and time for your team to remediate the findings, followed by our verification. We work with you to establish a timeline that aligns with your launch or upgrade schedule.
To begin, we typically require access to your code repository (e.g., GitHub), detailed technical documentation explaining the system's architecture and intended behavior, and a dedicated point of contact on your technical team for questions. The more comprehensive the documentation, the more efficient and effective the audit will be.
Yes. Initially, we provide a confidential report for your team to remediate findings. Once all critical and high-severity issues are resolved and verified by our team, we can issue a final, public-facing report. Many projects use this public report to build trust and transparency with their community and investors.
Our AI tools are not just off-the-shelf scanners. They are custom-trained models that learn from every audit we perform. This allows them to detect not just common vulnerabilities but also complex, protocol-specific anti-patterns. This AI-driven first pass provides a level of speed and breadth that is impossible for humans alone, freeing up our expert auditors to focus their time on what they do best: uncovering deep logical flaws and economic exploits that require human creativity and an adversarial mindset.
Ready to Secure Your Place in the Future of Finance?
Don't leave your project's fate to chance. A single vulnerability can undermine everything you've built. Schedule a free, no-obligation consultation with our security experts to discuss your project and receive a custom audit proposal.