We recently audited a DeFi protocol with $50M TVL. In 3 minutes, AI found a reentrancy in the withdraw function — a vulnerability that a human could miss. According to blockchain security reports, 80% of smart contract hacks involve common flaws that automation catches instantly. Our AI blockchain audit system is a scalable first pass that scans contracts in minutes. Clients save up to 60% on audit costs. For a typical 500-line contract, manual audit costs $15,000, while AI-assisted audit is $6,000, saving $9,000. With over 5 years of experience and 50+ audited contracts, we deliver fast, reliable results.
How AI Analysis Detects Vulnerabilities
The system uses a three-level approach: static analysis, ML classification, and LLM semantic parsing. This achieves 89% accuracy on a test set of 10,000 contracts.
Static code analysis. Parsing the AST of Solidity/Vyper/Rust (Solana): known patterns (reentrancy, integer overflow, tx.origin authentication, unchecked return values), access control, gas vulnerabilities, centralization risks. Tools: Slither with custom detectors (over 250 rules), Mythril for symbolic execution, Semgrep with Solidity rules.
ML classification based on code. Fine-tuned GraphCodeBERT on SmartBugs and SolidiFI-Benchmark datasets. Code embeddings + classifier for 14 vulnerability types. Accuracy: 87–91% on known classes, lower on novel patterns. The model is retrained quarterly on new incidents. This machine learning for audit ensures broad coverage.
Semantic analysis of business logic. LLM (GPT-4/Claude) analyzes the contract in the context of its purpose: compliance with the white paper, logical errors, edge cases in state transitions. For example, incorrect fee implementation or errors in token allocation. The full analysis cycle takes 2 to 5 minutes for a contract up to 500 lines.
What Vulnerabilities Do We Find?
Type and Severity Table
| Type | Example | Severity |
|---|---|---|
| Reentrancy | Exploit via call loop | Critical |
| Integer overflow | Incorrect balance calculations | Critical |
| Access control | Missing modifiers | High |
| Gas vulnerabilities | Unbounded loops | Medium |
| Centralization | Excessive owner privileges | High |
| Oracle manipulation | No circuit breaker | High |
| Upgradeable proxy | Improper initialization | Medium |
Total 14+ classes. The system also detects import errors (outdated libraries, unsafe external calls) and checks compliance with ERC-20, ERC-721, ERC-1155 standards. It covers Solidity analysis, Rust Solana audit, Vyper audit, and overall contract security.
Why AI Audit is More Effective for the First Pass?
| Characteristic | Manual Audit | AI Audit |
|---|---|---|
| Time for typical contract (500 lines) | 2-4 hours | 2-5 minutes |
| Missed known patterns | ~5% | <1% |
| Cost per contract | $15,000 | $6,000 |
| Depth of logic analysis | high | medium (complements manual) |
AI audit is not a replacement but a tool. It handles the routine, allowing experts to focus on complex business logic. After AI scanning, an engineer verifies all critical findings, filtering out false positives (average 12% on first pass). AI audit is 50 times faster than manual audit and misses 5 times fewer known vulnerabilities (<1% vs ~5%).
Work Process: From Upload to Report
- Upload: You send the contract or repository. We determine the stack (Solidity/Vyper/Rust) and dependencies.
- Scan: The AI system runs static, ML, and semantic analysis in 2-5 minutes.
- Verification: Our engineer checks critical findings, removes false positives.
- Report: A PDF document with prioritization from Critical to Info, problem code, and recommendations.
- Support: We assist with fixes and re-check the modified code.
What's Included in the Audit
- Full AI analysis (static, ML, semantic) detecting 14+ vulnerability types.
- Detailed report with severity, code examples, and exploit scenarios.
- Recommendations for fixes and gas optimization.
- Analysis of dependencies and third-party library risks.
- Consultation on results within 5 business days.
- Re-check after fixes (up to 2 iterations).
Timeline and Cost
Timeline: from 1 day for a simple contract to 5 days for a complex protocol. Cost is calculated individually based on code volume, dependencies, and required depth. Average savings compared to manual audit: 40-60%. Contact us for an estimate — we'll prepare a commercial proposal within 1 business day.
Our experience: over 50 smart contracts audited, including DeFi protocols with TVL > $100M. We have 5+ years in blockchain security. We use certified tools and update models based on real incidents. Confidentiality is guaranteed — we sign NDAs. Order an audit and receive a detailed report with priority fixes.