Thorough manual review combined with invariant testing — the most rigorous approach to smart contract security available today.
Traditional audits rely on manual review alone. Our approach pairs experienced security researchers with invariant test suites that systematically explore your contract's state space. This means we catch not just the obvious bugs, but edge cases that only surface under complex multi-transaction sequences — the kind that cause real exploits in production.
Not all audit approaches are equal. Here's how invariant-powered audits stack up against alternatives.
| Approach | State Space Coverage | Multi-Tx Sequences | Ongoing Protection | Cost Efficiency |
|---|---|---|---|---|
| Invariant Testing + Manual Review (Recon) | Exhaustive | Yes — stateful fuzzing | Yes — reusable test suite | High — catches more per dollar |
| Traditional Manual Audit | Limited to reviewer skill | Rarely tested | No — point-in-time | Medium |
| Automated Scanners (Slither, etc.) | Pattern-based only | No | No | Low cost but low coverage |
| Formal Verification | Mathematical proof | Yes — if modeled | Breaks on code changes | Very expensive |
Every Recon audit includes a detailed findings report, severity classification, remediation guidance, and a full invariant test suite you keep. The test suite continues protecting your codebase after the audit — run it in CI, extend it as you ship new features, or use Recon Pro to run it in the cloud.
We audit Solidity smart contracts across all major EVM-compatible chains: Ethereum, Arbitrum, Optimism, Base, Polygon, BSC, Avalanche, and more. Our tooling supports Foundry, Hardhat, and custom build setups.
Audit pricing depends on codebase size, complexity, and scope. A typical engagement for a focused protocol (1,000-5,000 nSLOC) ranges from $30K-$80K. Contact us for a tailored quote — we'll review your codebase and provide a fixed price within 48 hours.
Most audits take 2-4 weeks depending on codebase complexity. We can accommodate faster timelines for time-sensitive launches. The invariant test suite is delivered alongside the audit report.
You receive a detailed findings report with severity ratings, detailed descriptions, remediation recommendations, and proof-of-concept exploits for critical and high findings. You also get a full invariant test suite that you keep and can run indefinitely.
Yes. We regularly audit live protocols before upgrades, new feature deployments, or as part of ongoing security programs. We can fork mainnet state for realistic testing.
If your contract holds user funds, has admin roles, is upgradeable, or integrates with external protocols, you need an audit. See our full decision checklist to determine the right type of security review for your situation.
We combine top-tier manual review with invariant testing for comprehensive smart contract security. This means you get both expert human judgment and systematic state-space exploration. Our team includes a top Code4rena judge, the creator of EchidnaToFoundry, and engineers who've protected hundreds of millions in TVL.
Look for firms that deliver executable test suites, not just PDF reports. Ask for case studies with real bugs found and verify they do invariant testing. Check whether they've got experience on your chain and framework. A good auditor should also help you understand whether you need an audit at all and what level of engagement fits your budget.
Get a quote for your smart contract audit in 48 hours.
Send Audit RequestDeFi-native security researchers who understand composability risks, economic attacks, and protocol-specific vulnerability patterns.
We write the invariant tests that catch the bugs your manual audit missed — then hand you a test suite you can run forever.
Deep Solidity expertise combined with automated invariant testing — covering every EVM chain from Ethereum to L2s.
Cloud-powered fuzzing infrastructure that runs Echidna, Medusa, Halmos, and Foundry — 12,500+ campaigns and counting.