Open Beta: Enjoy a free 3-day Pro trial! Subscribe to keep uninterrupted access after the trial ends.
Professional smart contract audits cost $8,000–$50,000 and take weeks. Automated full-coverage scan: $4.99.
Unlimited quick scans. No signup required.
One-time scan credit. No subscription required.
Unlimited scans for individual developers.
Advanced engines + real-time monitoring for teams.
| Engine | Free | Pro ($59/mo) | Enterprise |
|---|---|---|---|
| Slither (static analysis, 90+ patterns) | ✓ | ✓ | ✓ |
| Semgrep (pattern matching) | ✓ | ✓ | ✓ |
| AI Detection (LLM reasoning) | — | ✓ | ✓ |
| Mythril (symbolic execution) | — | ✓ | ✓ |
| Aderyn (AST analysis) | — | ✓ | ✓ |
| Foundry Fuzz (dynamic testing) | — | — | ✓ |
| CI/CD API Integration | Limited | ✓ | ✓ |
| Slack/Discord webhook alerts | — | ✓ | ✓ |
| Continuous Monitoring | — | — | ✓ |
| Team seats | — | — | Up to 10 |
| Total detection patterns | 250+ | 350+ | 350+ automated |
AI Detection uses our server-provided model by default. You can also bring your own API key (Anthropic, OpenAI) for enhanced results.
250+ vulnerability patterns (Free/QuickScan) — up to 350+ on Pro — across 5 analysis engines: Slither (static analysis), Semgrep (pattern matching), Mythril (symbolic execution), Aderyn (AST analysis), and AI (LLM reasoning). Enterprise plans add Foundry Fuzz (dynamic testing) as a 6th engine. Paid plans get cross-engine confidence scoring — findings confirmed by multiple engines are marked "confirmed" for highest signal. Includes real DeFi hack references and code-level fixes.
No. ContractScan is a fast automated pre-check — better than running individual tools yourself (multi-engine with confidence scoring), but not a substitute for a professional audit. Always engage a security firm before deploying high-value contracts.
It depends on whether you are logged in. For anonymous scans (no login), your code is processed in an ephemeral sandbox and deleted immediately after analysis. For registered users, source code is stored securely to enable scan history and rescan features — you can delete it at any time from your dashboard.
Any EVM-compatible chain: Ethereum, BSC, Polygon, Arbitrum, Optimism, Base, Avalanche, etc.
BYOK is great for occasional one-off scans. Pro adds: unlimited scans without key management, CI/CD pipeline integration via REST API, Slack/Discord webhook alerts when findings change, PDF report download, and scan history. If you scan more than once a week or want automated security gates in your deployment workflow, Pro pays for itself quickly.
Professional audits cost $8,000–$50,000 and take 2–6 weeks. A single critical exploit costs an average of $5–50M in lost funds. ContractScan finds 70–80% of common vulnerability classes in seconds, letting you fix issues before an audit rather than during — reducing audit time and cost. At $59/mo, you break even catching one vulnerability that would have required a $700 audit finding.
Yes — cancel from your Paddle billing portal at any time with no penalties. You keep full Pro access until the end of your billing period. Refunds available within 7 days of purchase.