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Semgrep vs CodeQL: catalog facts
Semgrep	CodeQL
Freemium The community scanning engine is free. Commercial platform features are separate.	Freemium Free for research and open source code; other use falls under GitHub's CodeQL terms.
macOS, Linux, Command line	Command line
Runs custom or shared rules in development workflows.	Queries follow data flow from source to sink across a codebase Finds every variant of a known bug pattern
Rule quality and language support affect what it can detect.	Free use is limited to research and open source code Writing custom queries means learning the QL language
Downloadable app	Downloadable app
Open source	Closed source
License: LGPL-2.1	License: GitHub CodeQL Terms and Conditions
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.