Recon — Smart Contract Security Audits Powered by Invariant Testing

What is a smart contract audit?

A smart contract audit is a thorough security review of your blockchain code before it goes live. Auditors look for vulnerabilities like reentrancy, access control flaws, and logic errors that could let attackers steal funds. At Recon, we pair manual code review with invariant testing so the test suite keeps protecting you after the audit ends. Learn more: https://getrecon.xyz/learn/smart-contract-audit

How much does a smart contract audit cost?

Most DeFi audits range from $15,000 to $120,000 depending on codebase size, complexity, and scope. A focused protocol (1,000-3,000 lines) typically runs $30K-$50K, while larger codebases cost more. We give you a fixed-price quote within 48 hours of reviewing your code. Full pricing breakdown: https://getrecon.xyz/blog/smart-contract-audit-cost-pricing-guide

What is invariant testing?

Invariant testing defines properties that must always hold true in your smart contract — like 'total deposits always equal total shares' — then throws millions of random transaction sequences at it trying to break those rules. It catches bugs that manual review and unit tests miss, especially multi-step exploits involving reentrancy, rounding errors, or state corruption. Learn more: https://getrecon.xyz/learn/invariant-testing

Do I need a smart contract audit?

If your contract holds user funds, controls access to funds, or governs protocol parameters that affect funds, yes. The cost of an exploit almost always dwarfs the cost of an audit — DeFi lost over $1.7 billion to hacks in 2024 alone. Even if you have thorough unit tests, an independent security review catches blind spots. Decision guide: https://getrecon.xyz/blog/do-you-need-smart-contract-audit

How long does an audit take?

Most audits take 2-4 weeks depending on scope. A focused codebase (under 3,000 lines) usually wraps in 2-3 weeks. Larger or more complex protocols can take 4-6 weeks. At Recon, invariant testing runs in parallel with manual review using cloud fuzzing, so you get deeper coverage without extra calendar time.