Smart Contract Audit Services: Fortify Your Code, Secure Your Future
Don't let a single vulnerability jeopardize your launch.
Our AI-augmented audits, conducted by elite security experts, identify and neutralize threats before they cost you millions.
Trusted by Industry Leaders and Trailblazing Startups
Why Entrust Your Code to Errna?
In a world of automated scanners and checklist audits, we provide what truly matters: deep, adversarial analysis backed by decades of security expertise and cutting-edge AI. We don't just find bugs; we secure your business logic and protect your reputation.
AI-Augmented Audits
We leverage proprietary AI tools to perform exhaustive static and dynamic analysis, identifying complex attack vectors and subtle vulnerabilities that manual reviews can miss, ensuring unparalleled code coverage.
Elite Security Experts
Our auditors are not just developers; they are seasoned cybersecurity professionals with a deep understanding of blockchain architecture, cryptography, and adversarial tactics. They think like hackers to protect you from them.
Full-Spectrum Analysis
We go beyond syntax. Our audits scrutinize your project's economic model, business logic, and architectural design to identify potential exploits that aren't visible in the code alone.
Actionable Reporting
You receive a clear, comprehensive report categorizing vulnerabilities by severity (Critical to Informational) with detailed explanations and concrete, actionable guidance for remediation.
Verifiable Process Maturity
As a CMMI Level 5 and ISO 27001 certified company, our audit process is rigorously defined, repeatable, and optimized for quality, ensuring consistent, high-quality results every time.
Collaborative Remediation
Our service doesn't end with the report. We work directly with your development team to ensure they understand the findings and implement fixes correctly, providing re-auditing to verify resolutions.
Confidential & Secure
We operate under strict NDAs and employ robust security protocols to ensure your proprietary code and business logic remain confidential throughout the entire audit process.
Proven Track Record
With a legacy in enterprise software and security since 2003, we bring a level of experience and reliability that newer, blockchain-native firms cannot match. We've secured mission-critical systems for decades.
End-to-End Partnership
We view security as an ongoing partnership. From initial design consultation to post-deployment monitoring, we offer a full suite of services to keep your project secure as it evolves.
Our Comprehensive Smart Contract Audit Services
We offer a full spectrum of audit and security services tailored to the unique needs of your Web3 project, ensuring security at every layer of your stack.
DeFi Protocol Audits
We conduct in-depth analysis of complex DeFi protocols, including lending platforms, DEXs, and yield farms, focusing on economic exploits, oracle manipulation, and governance attacks.
- Prevent flash loan attacks and economic imbalances.
- Secure governance mechanisms and admin controls.
- Ensure accurate calculations and prevent fund loss.
Token Contract Audits (ERC-20, BEP-20, etc.)
Ensure your token contract is secure, compliant, and functions as intended. We audit for common vulnerabilities, access control issues, and adherence to established standards.
- Verify token supply mechanics and prevent inflation bugs.
- Secure transfer, approval, and burn functionalities.
- Ensure compatibility with decentralized exchanges and wallets.
Gas Optimization Analysis
Beyond security, we analyze your code for gas inefficiencies. Our recommendations can significantly reduce transaction costs for your users, improving user experience and adoption.
- Lower user transaction fees, increasing competitiveness.
- Optimize loops and storage for maximum efficiency.
- Implement best practices for gas-efficient coding.
Cross-Chain Bridge Audits
Bridges are high-value targets. We meticulously audit the security of your cross-chain communication protocols, lock/mint mechanisms, and validator security to prevent catastrophic fund loss.
- Secure asset custody and transfer logic.
- Prevent replay attacks and signature forgery.
- Validate event handling and message passing.
Layer 2 Solution Audits
We audit rollups, sidechains, and other Layer 2 solutions, focusing on the unique security challenges of sequencers, fraud proofs, and data availability mechanisms.
- Secure the bridge contract between L1 and L2.
- Verify the integrity of state transition logic.
- Assess risks related to sequencer centralization or failure.
NFT Contract Audits (ERC-721, ERC-1155)
Secure your NFT project's core asset. We audit minting logic, ownership transfers, metadata handling, and royalty standards to protect creators and collectors.
- Prevent unauthorized minting and supply manipulation.
- Ensure EIP-2981 royalty standard compliance.
- Secure URI and metadata management.
dApp & Web3 Integration Audits
A secure contract is only one part of the equation. We audit your entire decentralized application, including front-end interactions, wallet connections, and off-chain components.
- Prevent vulnerabilities from insecure front-end logic.
- Secure interactions between contracts and user interfaces.
- Identify risks from centralized off-chain dependencies.
Code Quality & Best Practices Review
We review your codebase for adherence to industry best practices, code clarity, and maintainability, helping your team build more robust and scalable software for the long term.
- Improve code readability and maintainability.
- Ensure up-to-date Solidity/Rust versions and libraries.
- Provide guidance on secure development lifecycle practices.
Logic & Architecture Review
Before a line of code is audited, we can review your system's architecture and logic to identify design-level flaws that could lead to security vulnerabilities or unintended behavior.
- Identify potential exploits at the design phase.
- Ensure the architecture aligns with security goals.
- Reduce costly rewrites by catching flaws early.
Upgradeability Audits
Implementing upgradeable contracts introduces complexity and risk. We audit your proxy patterns (e.g., UUPS, Transparent) to ensure storage layout is preserved and admin controls are secure.
- Prevent storage collisions during upgrades.
- Secure initialization and admin functions.
- Verify the proxy and implementation logic.
Blockchain Security Audits
For projects building their own Layer 1 or private blockchain, we provide comprehensive security audits covering consensus mechanisms, networking protocols, and cryptographic implementations.
- Analyze consensus algorithms for vulnerabilities.
- Assess peer-to-peer networking for denial-of-service risks.
- Verify cryptographic primitives and implementations.
Penetration Testing
We conduct authorized, simulated cyberattacks on your entire Web3 ecosystem, including dApps, APIs, and nodes, to identify and exploit real-world vulnerabilities before malicious actors do.
- Test your system's resilience against live attacks.
- Identify weaknesses in infrastructure and configuration.
- Provide a hacker's-eye view of your security posture.
Formal Verification
For mission-critical contracts, we use mathematical methods to prove that your code behaves exactly as specified, providing the highest possible level of security assurance against certain classes of bugs.
- Achieve mathematical certainty about code correctness.
- Eliminate entire categories of potential vulnerabilities.
- Ideal for core financial primitives and treasury contracts.
Pre-launch & Emergency Audits
We offer flexible engagement models, including rapid-response audits for projects nearing launch or emergency incident response audits for platforms that have experienced a security event.
- Get a final security check before mainnet deployment.
- Receive urgent support during a security crisis.
- Flexible scheduling to meet critical deadlines.
Post-Deployment Monitoring & Incident Response
Security is not a one-time event. We offer retainer services for continuous monitoring of your live contracts and provide rapid incident response planning and support in case of an exploit.
- Proactively monitor for new threats and vulnerabilities.
- Establish a clear plan for handling security incidents.
- Access our expert team for emergency support.
Our Meticulous 5-Step Audit Process
We follow a transparent and collaborative process designed for maximum rigor and efficiency, keeping you informed at every stage.
1. Scoping & Planning
We begin with a deep dive into your project's architecture, business logic, and specific security concerns. We define the scope of the audit and establish clear communication channels and timelines.
2. Automated Analysis
Our proprietary and industry-leading static and dynamic analysis tools perform an initial, exhaustive scan of your codebase to identify common vulnerabilities and potential hotspots for deeper review.
3. Manual Code Review
This is the core of our audit. Our elite security experts conduct a line-by-line manual review of your code, focusing on business logic flaws, economic exploits, and complex vulnerabilities that automated tools miss.
4. Reporting & Collaboration
We deliver a detailed, confidential report with categorized findings and actionable remediation advice. We then hold a collaborative session with your team to discuss the vulnerabilities and ensure a clear path to resolution.
5. Remediation & Re-Audit
After your team implements the fixes, we perform a re-audit to verify that all identified vulnerabilities have been successfully and securely resolved. A final, public-facing report is then issued.
Technologies & Platforms We Secure
Our expertise spans the entire Web3 ecosystem. We audit contracts written in various languages across numerous blockchain platforms.
Success Stories: From Vulnerable to Fortified
The Problem
The client was preparing for a major V2 launch that introduced complex new features, including leveraged yield farming and cross-asset collateralization. They needed assurance that these new, intricate contracts were free from economic exploits before deploying.
Key Challenges
- Complex economic interactions between multiple smart contracts.
- Potential for flash loan manipulation of price oracles.
- Ensuring correct calculation of interest rates and rewards.
- Securing administrative functions against unauthorized access.
Our Solution
We conducted a multi-faceted audit combining automated scanning with intensive manual review focused on business logic.
- Performed deep analysis of the interest rate models and reward mechanisms.
- Simulated various flash loan attack scenarios to test oracle resilience.
- Identified and reported a critical re-entrancy bug and several medium-severity access control issues.
- Provided gas optimization suggestions that reduced key transaction costs by 15%.
The Problem
The client's platform allowed NFT metadata to be updated based on external events, creating unique security challenges. They needed to ensure that only authorized parties could trigger updates and that the auction and bidding mechanisms were fair and tamper-proof.
Key Challenges
- Securing the off-chain logic that triggered on-chain metadata updates.
- Preventing race conditions and front-running in the auction contract.
- Ensuring compliance with ERC-721 and EIP-2981 royalty standards.
- Protecting against re-entrancy during bid placements and withdrawals.
Our Solution
Our audit focused on the unique intersection of on-chain and off-chain logic, a common point of failure in complex dApps.
- Discovered a flaw in the signature verification for metadata updates.
- Recommended a commit-reveal scheme to mitigate front-running during auctions.
- Corrected the implementation of the royalty standard to ensure artists were paid correctly.
- Provided a full review of both the smart contracts and the related API endpoints.
The Problem
The client was developing a permissioned blockchain to track high-value goods. The smart contracts needed to manage complex state transitions, multi-signature approvals from various stakeholders (suppliers, shippers, customs), and ensure data privacy.
Key Challenges
- Implementing a robust, multi-layered access control system.
- Ensuring the finite state machine logic was flawless and without dead-ends.
- Protecting sensitive commercial data on a shared ledger.
- Integrating securely with existing enterprise ERP systems.
Our Solution
We approached this as both a security and a business logic audit, leveraging our deep experience in enterprise systems.
- Designed and recommended a Role-Based Access Control (RBAC) architecture.
- Used formal methods to model and verify the state transition logic.
- Identified an issue where a shipment could get permanently stuck in a specific state.
- Provided guidance on using zero-knowledge proofs for enhancing data privacy.
A single line of vulnerable code can cost millions. Are you willing to take that risk?
Get Your Free Audit ConsultationEmpowering Security Across Industries
Our smart contract audit services provide critical security for projects in a wide range of sectors, protecting assets and enabling innovation.
DeFi
Securing lending protocols, DEXs, yield aggregators, and stablecoins from economic exploits.
NFTs & Gaming
Protecting NFT marketplaces, GameFi economies, and digital asset ownership for creators and players.
FinTech & Banking
Auditing tokenization platforms, payment rails, and digital identity solutions for financial institutions.
Supply Chain
Ensuring the integrity of traceability systems, trade finance contracts, and logistics management.
Healthcare
Securing contracts for patient data management, clinical trial records, and pharmaceutical traceability.
Government & Public Sector
Auditing systems for voting, public records, and identity management to ensure transparency and trust.
What Our Clients Say
"The depth of Errna's analysis was astounding. They uncovered subtle economic vulnerabilities in our protocol that four other firms had missed. Their team is truly in a league of their own. We won't launch anything without their stamp of approval."
"As a non-technical founder, I needed an audit partner who could communicate complex risks in simple terms. Errna's team was patient, professional, and gave us a clear, prioritized list of issues. Their work was instrumental in our successful fundraise."
"We were on a tight deadline for our mainnet launch. Errna's team was incredibly responsive and delivered a comprehensive audit report ahead of schedule. Their professionalism and efficiency were a game-changer for our project timeline."
"The post-audit support was just as valuable as the audit itself. The Errna auditors worked directly with our engineers to ensure every vulnerability was properly patched. It felt like a true partnership, not just a service."
"For our enterprise application, we needed an auditor with verifiable credentials. Errna's CMMI Level 5 and ISO certifications gave our compliance department the confidence they needed to sign off on the project. Their process is as robust as their technical skills."
"The gas optimization report was an unexpected bonus. The suggestions from Errna's audit helped us reduce our users' transaction costs by over 20%, which has been a huge competitive advantage in a crowded market."
Meet Our Security & Blockchain Experts
Our audits are performed by a dedicated team of certified cybersecurity professionals, ethical hackers, and veteran blockchain architects.
Joseph A.
Expert Cybersecurity & Software Engineering. Leads our adversarial testing team, specializing in penetration testing and identifying complex economic exploits in DeFi protocols.
Vikas J.
Divisional Manager, ITOps, Certified Expert Ethical Hacker. Manages our infrastructure security audits, ensuring nodes, APIs, and off-chain components are hardened against attack.
Akeel Q.
Manager, Certified AI & Machine Learning Specialist. Develops our proprietary AI-powered analysis tools that provide deep, automated insights into code vulnerabilities before manual review.
Prachi D.
Manager, Certified Cloud & IoT Solutions Expert. Specializes in auditing smart contracts that interact with external systems and oracles, ensuring data integrity and secure communication.
Frequently Asked Questions
A smart contract audit is a comprehensive security analysis of a blockchain project's smart contract codebase. The goal is to identify vulnerabilities, bugs, and logical errors before they can be exploited on the blockchain. It involves both automated scanning and intensive manual review by security experts to ensure the code behaves as intended and is safe from known attack vectors.
Once a smart contract is deployed on the blockchain, it is immutable, meaning its code cannot be changed. A single vulnerability can lead to irreversible and catastrophic loss of funds, as seen in numerous high-profile hacks. An audit is a critical step to protect user funds, build community and investor trust, and safeguard your project's reputation.
The duration of an audit depends on the complexity and length of the codebase. A simple token contract might take a few days, while a complex DeFi protocol could take several weeks. After our initial scoping call, we will provide you with a detailed timeline for your specific project.
The cost is determined by the scope of work, code complexity, and the level of assurance required. We provide a custom quote after an initial, free consultation where we assess your project's needs. While it is a significant investment, the cost of an audit is a fraction of the potential losses from an exploit.
To begin, we typically require access to your codebase (e.g., via a private GitHub repository), technical documentation explaining the system's architecture and intended functionality, and a clear definition of the scope of the contracts to be audited.
Yes. After the initial confidential report is delivered and your team has remediated the findings, we conduct a re-audit. Once all critical and high-severity issues are resolved, we issue a final, public-facing report that you can share with your community and investors as a testament to your commitment to security.
Ready to Fortify Your Project?
Don't leave your success to chance. A professional security audit is the best investment you can make in your project's future. Schedule a free, no-obligation consultation with our security experts to discuss your needs and receive a custom audit proposal.
Our team will walk you through our process, answer your questions, and provide a clear scope and timeline for securing your smart contracts.
Schedule Your Free Consultation