Smart Contract Audit Services
Don't let a single vulnerability drain your treasury and destroy user trust.
Our AI-augmented audits secure your code, so you can launch with absolute confidence.
Trusted by Web3 Innovators and Global Enterprises
Your Code is a Target. The Average Exploit Costs Millions.
In Web3, the stakes are higher. There's no bank to reverse a transaction, no central authority to appeal to. A single vulnerability in your smart contract—an oversight in a single line of code—can result in the instantaneous and irreversible loss of all user funds. In the last year alone, billions of dollars were drained from DeFi protocols due to exploits that a thorough audit could have prevented. This isn't just a financial risk; it's a reputational catastrophe that can destroy user trust and end your project before it even begins.
Why Trust Errna to Secure Your On-Chain Assets?
AI-Augmented Manual Review
We combine AI-powered analysis for scale with deep, manual review by security experts to find complex business logic flaws and novel attack vectors that automated scanners miss.
Full-Spectrum Vulnerability Coverage
We cover everything from technical exploits like re-entrancy to economic vulnerabilities like oracle manipulation, providing a holistic security posture assessment.
Actionable Remediation Guidance
We deliver clear, prioritized reports with code-level recommendations and work with your team to ensure they can implement fixes effectively.
Certified Security Engineers
Your code is analyzed by specialists holding industry-recognized certifications (OSCP, CEH) with extensive experience auditing high-value Web3 protocols.
Verifiable Process Maturity
As a CMMI Level 5 and ISO 27001 certified company, our audits are consistent, thorough, and meticulously documented, giving you and your stakeholders peace of mind.
Post-Audit Partnership
Our engagement includes a free re-audit of implemented fixes. We aim to be your long-term security partner, providing support as your protocol evolves.
Transparent & Collaborative Process
You'll have a dedicated communication channel and regular updates. We foster a collaborative environment focused on strengthening your code together.
Deep Web3 & DeFi Expertise
We live and breathe this space. Our domain expertise allows us to identify economic and incentive-based risks that a purely technical audit would overlook.
Confidentiality & Security First
All audits are conducted under strict NDAs in a secure, isolated environment. Your intellectual property is protected at every stage of our engagement.
Comprehensive Audit Solutions for the Entire Web3 Ecosystem
Our audit services are tailored to the unique security challenges of different blockchain applications. We provide a meticulous, in-depth analysis to ensure the integrity, security, and efficiency of your smart contracts, no matter the use case.
DeFi Protocol Audits
This is our most intensive audit, designed for lending platforms, DEXs, yield farms, and other protocols managing significant user funds. We focus on both technical code security and economic vulnerability modeling to protect against exploits and market manipulation.
- Prevent flash loan attacks and other economic exploits.
- Ensure the mathematical correctness of your financial calculations.
- Build deep trust with your community and liquidity providers.
NFT & GameFi Audits
We audit NFT contracts (ERC-721, ERC-1155), marketplaces, and the complex smart contracts that power Play-to-Earn (P2E) gaming ecosystems. Our focus is on asset integrity, ownership security, and fair mechanics.
- Secure against fake bids, ownership theft, and replay attacks.
- Verify the integrity of random number generation and prize distribution.
- Ensure royalty standards are correctly implemented and enforced.
Token Contract Audits (ERC-20, BEP-20, etc.)
A focused audit for fungible token contracts, crucial for any project launching an ICO, IDO, or utility token. We verify compliance with established standards, check for vulnerabilities in the tokenomics, and ensure functions like minting, burning, and transfers are secure.
- Gain investor confidence and meet exchange listing requirements.
- Prevent common token exploits like uncontrolled minting or transaction fee manipulation.
- Ensure your token supply and distribution mechanics are immutable and correct.
DAO & Governance Audits
We analyze the full suite of smart contracts that manage a Decentralized Autonomous Organization, including the voting, proposal, and treasury management systems. The audit ensures the governance process is secure, transparent, and resistant to manipulation.
- Protect the DAO's treasury from unauthorized access or malicious proposals.
- Ensure the voting mechanism is fair and accurately reflects token holder intent.
- Prevent governance takeovers and other systemic risks.
Layer 2 & Bridge Audits
Auditing for solutions built on L2s (e.g., Optimism, Arbitrum) and the cross-chain bridges that connect ecosystems. These are high-risk components that require specialized analysis of their unique architectures and potential failure points.
- Secure the lock-and-mint or burn-and-release mechanisms of your bridge.
- Identify risks related to L2 sequencers, provers, and data availability.
- Prevent catastrophic cross-chain exploits that can drain entire protocols.
Additional Specialized Audits
Our expertise covers the full lifecycle and infrastructure of Web3 applications.
- Gas Optimization Analysis: Improve user experience by making your dApp cheaper to use.
- Smart Contract Penetration Testing: Actively try to exploit your contracts in a testnet to uncover complex attack paths.
- Formal Verification: Achieve mathematical certainty about your contract's core logic for mission-critical components.
- Pre-Launch & Post-Launch Audits: Ensure security at initial deployment and for all future upgrades.
- Multi-Language Audits: Deep expertise in Solidity, Rust, and Vyper.
- dApp & Wallet Security Audits: Holistic review of your entire application stack, including front-end and off-chain components.
- Blockchain Protocol Audits: In-depth review of core consensus and cryptography for new L1/L2 chains.
- Security Retainer & Incident Response: An ongoing partnership with security experts on-call 24/7.
Our Meticulous Path to Code Security
Initial Scoping & Consultation
We begin by understanding your project's architecture, business logic, and security concerns to define a focused audit scope.
Automated Static & Dynamic Analysis
Our AI-powered tools perform a broad sweep, identifying common vulnerabilities and code quality issues based on a massive exploit database.
Deep Manual Code Review
The core of our audit: certified engineers conduct a line-by-line review to find complex flaws that automated tools miss.
Vulnerability Reporting & Collaboration
We deliver a detailed, confidential report with actionable remediation advice and walk your team through the findings.
Remediation & Re-Audit
After you implement fixes, we perform a complimentary re-audit to verify that all vulnerabilities have been securely resolved.
From Common Bugs to Complex Economic Exploits
Re-entrancy Attacks
Integer Overflow/Underflow
Oracle Manipulation
Access Control Flaws
Business Logic Errors
Gas Optimization Issues
Front-Running Vulnerabilities
Technology & Platform Expertise
Our Audits in Action: Real-World Impact
Securing a High-Yield DeFi Protocol from a Multi-Million Dollar Economic Exploit
A venture-backed startup needed a comprehensive audit for their innovative lending protocol on Ethereum before mainnet launch to secure user funds and gain community trust.
Key Challenges:
- Auditing a large, complex codebase with over 5,000 lines of Solidity.
- Modeling potential economic exploits, not just standard code vulnerabilities.
- Ensuring the security of interactions with third-party protocols.
- Meeting a tight pre-launch deadline without compromising quality.
Ensuring Fairness and Asset Security for a Next-Gen NFT Gaming Platform
An established gaming studio needed to secure their complex P2E game, including an NFT marketplace, token contract, and on-chain game mechanics, to protect the game's economy and build player trust.
Key Challenges:
- Auditing the fairness of a pseudo-random number generation process for loot boxes.
- Securing the minting and ownership logic for thousands of unique NFT assets.
- Preventing exploits in the in-game currency token contract.
- Ensuring the marketplace was safe from re-entrancy bugs.
Enterprise-Grade Audit for a Tokenized Real Estate Platform
A regulated financial institution required the highest level of security assurance for their platform, which issued security tokens for fractional real estate ownership, needing to meet strict financial and compliance regulations.
Key Challenges:
- Ensuring compliance with security token standards (e.g., ERC-1400).
- Securing access control logic for investor whitelisting and KYC/AML.
- Verifying the mathematical accuracy of the dividend distribution mechanism.
- Producing audit documentation to meet enterprise risk standards.
Meet a Few of Our Lead Security Engineers
Your project's security is in the hands of seasoned, certified professionals. Our team is composed of experts who are passionate about blockchain security and dedicated to protecting the Web3 ecosystem.
Joseph A.
Expert Cybersecurity & Software Engineering. Specializes in identifying complex business logic flaws and economic exploits in DeFi protocols.
Akeel Q.
Certified AI & Machine Learning Specialist. Leads development of our proprietary AI analysis tools to detect novel vulnerability patterns.
Vikas J.
Certified Expert Ethical Hacker. Brings a hacker's mindset to our defensive audits, excelling at penetration testing and simulating real-world attack scenarios.
The Errna Audit vs. Automated-Only Scans
| Feature | Automated-Only Scan | Errna's AI-Augmented Manual Audit |
|---|---|---|
| Identifies Common Vulnerabilities | ||
| Detects Business Logic Flaws | ||
| Models Economic Exploits | ||
| Provides Gas Optimization Insights | ||
| Actionable Remediation Advice | Limited | |
| Expert Consultation & Support | ||
| Free Remediation Re-Audit | ||
| Builds Real Investor & User Trust |
What Our Clients Say
"The audit from Errna was incredibly thorough. They didn't just run a scanner; their team manually dug into our business logic and found a subtle but critical economic vulnerability that could have been catastrophic."
"As a founder, security is what keeps me up at night. Choosing Errna for our smart contract audit was the best decision we made. The audit report became a key asset in our investor discussions, proving our commitment to security."
"We needed an audit partner with verifiable process maturity, and Errna's CMMI Level 5 certification stood out. Their process was as rigorous as advertised. They delivered a comprehensive analysis that satisfied our internal security and compliance teams."
Frequently Asked Questions
A smart contract audit is an in-depth security analysis of a smart contract's codebase. The goal is to identify vulnerabilities, bugs, and other security flaws before the code is deployed to a live blockchain, where it would be immutable and potentially hold millions of dollars in user funds.
Because smart contracts are immutable and often control high-value assets, any vulnerability can be exploited by attackers, leading to irreversible financial loss. An audit is a critical step to protect user funds, build community trust, prevent reputational damage, and is often a requirement for securing insurance or listing on major exchanges.
The cost of an audit depends on the complexity and length of the code. A simple token contract might cost a few thousand dollars, while a complex DeFi protocol could be $25,000 or more. We provide a custom quote for every project based on its specific scope. Contact us for a free, no-obligation quote.
The timeline also depends on code complexity. A typical audit takes between 1 to 4 weeks. This includes the initial review, reporting, and the re-audit after your team has implemented fixes. We can provide a more precise timeline after our initial scoping call.
You will receive a comprehensive audit report that includes an executive summary for non-technical stakeholders and a detailed technical breakdown of all findings. Each finding is categorized by severity and includes a clear explanation of the vulnerability and actionable recommendations for how to fix it.
No audit can provide a 100% guarantee of security. The Web3 space is constantly evolving, and new attack vectors are always emerging. However, a thorough audit from a reputable firm like ours significantly reduces your risk by identifying and eliminating known vulnerabilities and common attack patterns, making your project a much harder target for attackers.
Ready to Secure Your Launch?
Don't leave your project's future to chance. A professional security audit is the single most important investment you can make in your platform's longevity and success. Let our team of expert security engineers give you the peace of mind you need to launch with confidence.
Schedule a free, confidential consultation to discuss your project and receive a custom audit quote.