Semgrep
Semgrep is a fast, open-source static analysis engine that finds bugs and security issues in code with pattern rules and ready-made rule packs.
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- Category
- Application Security
- Pricing
- Freemium
- Platforms
- LinuxWindowsmacOSWeb
- Licence
- Open source
- Reviewed
- Last reviewed 1 October 2026
What it is
Semgrep is a fast static analysis toolkit for finding bugs, security issues and policy violations in source code. The open-source CLI engine matches patterns and rules across many languages; Semgrep also offers a commercial platform with additional policies, supply-chain and CI features. It is a practitioner favourite for shifting security checks left in development workflows.
What it helps with
- Scanning repositories locally or in CI with the Semgrep CLI.
- Using community and Semgrep-maintained rule packs for common vulnerability classes.
- Writing custom rules that resemble code patterns rather than complex compiler plugins.
- Enforcing organisational coding and security policies as code.
- Integrating findings into pull requests and developer feedback loops.
- Extending from free open-source scanning into Semgrep AppSec Platform capabilities where licensed.
Who it's for
Application security engineers, developers and DevSecOps teams who want lightweight, rule-driven static analysis on codebases they are authorised to scan.
Worth knowing
Semgrep CLI is free and open source; advanced product features may require a Semgrep commercial plan. Official docs and branding are published at semgrep.dev and in the semgrep/semgrep repository. Always scan only repositories you are permitted to analyse. Attribution: framing from semgrep.dev and the Semgrep README; logos from the project images directory.