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Vale vs doc8: catalog facts
Vale	doc8
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free and open source under the Apache-2.0 license.
Windows, macOS, Linux, Command line	Command line
Runs style checks in editors, scripts or continuous integration.	Checks reStructuredText and plain text documentation Can run against a documentation directory
You need to choose or write the style rules it enforces.	Focused on documentation style checks
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.