Manual smart contract audits range from $5,000 to $300,000+. This guide breaks down real pricing across every major firm — and explains when AI auditing is the smarter financial choice.
| Feature | Manual Audit Firms | SmartContractAuditor.ai |
|---|---|---|
| CertiK | $50k – $150k | — |
| Trail of Bits | $150k – $300k+ | — |
| OpenZeppelin | $50k – $120k | — |
| Hacken | $10k – $50k | — |
| Cyfrin | $15k – $60k | — |
| ConsenSys Diligence | $50k – $150k | — |
| Slither (open-source) | Free | — |
| SmartContractAuditor.ai | — | Free – $100/mo |
Manual Audit Firms Cost
$5,000 – $300,000+
Manual Audit Firms Timeline
2 – 12 weeks
AI Audit Cost
Free – $100/mo
AI Audit Timeline
< 60 seconds
Trail of Bits is the most expensive and most prestigious audit firm. Engagements start at $150,000 for simple contracts and commonly exceed $300,000 for complex DeFi protocols. Their team includes PhD-level security researchers and cryptographers. Clients include Ethereum Foundation, Uniswap, and major institutional DeFi protocols.
CertiK ranges from $50,000–$150,000. They have the largest audit volume (4,000+ projects) and operate Skynet for post-launch monitoring. Brand recognition is the highest in the industry.
ConsenSys Diligence and OpenZeppelin (audit arm) price similarly to CertiK ($50k–$120k) with deep Ethereum-native expertise. OpenZeppelin's library authorship gives them particular credibility for ERC-standard contracts.
Hacken offers competitive pricing ($10,000–$50,000) with strong presence in Eastern Europe and Asia. Known for consistent quality and faster turnarounds than Tier 1 firms.
Cyfrin (Patrick Collins' firm) prices at $15,000–$60,000 and emphasizes educational content alongside security research. Strong reputation in the developer community.
Halborn, Quantstamp, and PeckShield operate in the $15,000–$75,000 range, each with different specializations (offensive security, formal methods, and on-chain monitoring respectively).
Audit pricing is primarily driven by:
AI-powered smart contract auditing addresses the bottom 80% of the market that can't access manual auditing at these price points. For contracts where:
AI auditing catches the vulnerability classes responsible for the majority of historical exploits: reentrancy, access control flaws, integer arithmetic bugs, and unsafe external calls. The $60M DAO hack, the $34M Harvest Finance exploit, and the $11M dForce attack all exploited vulnerabilities AI tools detect reliably.