Smart contract scanner for your Solidity code
For developers and teams with a Solidity repo who want to find vulnerabilities before deploy or before a paid audit. Checking a token you want to buy? This page isn't about that: we scan source code, not token addresses.
Types of smart contract scanners
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Static analysis (Slither) reads your code and flags known patterns. It's fast, but noisy, and it misses logic bugs.
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Symbolic execution (Mythril) explores execution paths to find inputs that break things. It's deeper on single contracts, slower, and also misses business-logic bugs.
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Hosted pattern scanners (SolidityScan) run pattern checks in the cloud and give you a report. They're convenient, but they share the limits of pattern tools.
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AI review of the whole repo (Guardix) reads the codebase the way an auditor does and looks for logic and cross-contract bugs, not just known patterns.
Scanner comparison, as of October 2026
| Slither | Mythril | SolidityScan | Guardix | |
|---|---|---|---|---|
| Type | Slither Static analyzer, open source | Mythril Symbolic execution, open source | SolidityScan Hosted scanner | Guardix AI pre-audit of a repo at a commit |
| Price | Slither Free | Mythril Free | SolidityScan $29.99 per report (1k LOC); $199.99/mo | Guardix $200 flat |
| Time | Slither Runs locally | Mythril Runs locally | SolidityScan Up to 5 min per scan | Guardix 1–3 hours |
| Public benchmark | Slither Not stated | Mythril Not stated | SolidityScan Not public | Guardix EVMBench 104 of 117* |
| Source | Slither Slither | Mythril Mythril | SolidityScan SolidityScan pricing | Guardix Guardix pricing |
*Self-reported. Benchmarks across tools aren't directly comparable; see AI smart contract auditor.
How to use them together
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Run free Slither while you build.
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Run a Guardix pre-audit before launch or before a paid audit. What a pre-audit is
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Get a manual audit for code that will hold serious funds. What an audit costs
Guardix doesn't run as a CI step or GitHub Action today.
What a Guardix scan gives you
A report for one repo at one commit, with findings to fix. After you fix them, a re-check of the new commit is the same $200 flat. If a run fails, you get a re-run or full credit.
Moving off MythX? See MythX alternatives.
FAQ
- What is a smart contract scanner?
- A tool that checks smart contract source code for vulnerabilities before you deploy it.
- Is a smart contract checker the same as a token or rug checker?
- No. A rug or token checker looks at a deployed token address to help traders. A smart contract scanner checks the source code developers are about to deploy.
- Are free scanners like Slither and Mythril enough?
- They're a good first pass and cost nothing. They catch known patterns but are noisy and miss logic bugs, so they're not enough on their own for code that will hold real money.
- How is an AI scanner different from Slither?
- Slither matches known patterns quickly. An AI review reads the whole repo and looks for logic and cross-contract bugs. It takes longer: Guardix needs 1–3 hours.
- Does a scanner replace a manual audit?
- Not for high-value code. A scanner or pre-audit makes the manual audit shorter and its findings less basic.