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Ruff vs YAPF: catalog facts
Ruff	YAPF
Free The open-source application is available without a license fee.	Free Free and open source under the Apache-2.0 license.
Windows, macOS, Linux	Command line
Linting, formatting and fix support in one tool	Formats Python files to a configured style Can be integrated with editor plugins
It does not replace running your program or its tests.	The project describes its release as beta It formats Python only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
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 October 8, 2026

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