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Static analysis at ludicrous speed
Find bugs and enforce code standards

Semgrep is a fast, open-source, static analysis tool for finding bugs and enforcing code standards at editor, commit, and CI time. Get started โ†’

Semgrep analyzes code locally on your computer or in your build environment: code is never uploaded.

Its rules look like the code you already write; no abstract syntax trees, regex wrestling, or painful DSLs. Here's a quick rule for finding Python print() statements, run it by clicking the [โ–ธ] button:

The Semgrep ecosystem includes:

  • Semgrep - The open-source command line tool at the heart of everything.
  • Semgrep Playground - An online interactive tool for writing and sharing rules.
  • Semgrep Registry - 2,000+ community-driven rules covering security, correctness, and performance bugs.
  • Semgrep App - Deploy, manage, and monitor Semgrep at scale with free and paid tiers. Integrates with CI providers such as GitHub, GitLab, CircleCI, and more.

Semgrep is developed and commercially supported by r2c, a software security company.

Get started โ†’

Language supportโ€‹

Semgrep supports 20+ languages.

GA โœ…Beta ๐Ÿ›Experimental ๐Ÿšง
Generic (ERB, Jinja, etc.)
  • Experimental: experimental support with many known bugs.
    • Looking for dedicated users to help us improve these languages.
    • Expect limited support responses, as these languages will be lowest priority.
  • Beta: supported language with known bugs.
    • Looking for beta users to report bugs and rapidly iterate with our team.
    • Expect best-effort support responses when there are no higher priority requests being handled.
  • GA: production-level support with few known bugs.
    • Looking for bug reports and feedback from users.
    • Expect timely and thorough support responses, generally within 24 hours.

To determine experimental, beta, or general availability (GA) status we scan a wide corpus of projects and measure the parse rate of each language. For more details see the breakdown of all supported languages.


Semgrep is an evolution of pfff, which began at Facebook in 2009, which itself was an evolution of the Linux refactoring tool Coccinelle. r2c revitalized the project after its original author, Yoann Padioleau, joined the company.

Understanding Semgrep development philosophyโ€‹

See the Semgrep CLI Philosophy for details about why Semgrep is free, our goals for development, and the designed capabailities and limits of the static analysis engine.