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Vale vs ProWritingAid: catalog facts
Vale	ProWritingAid
Free The open-source software is available without a license fee. Hosting, hardware and…	Freemium Free to start, with a paid version that unlocks the full toolkit.
Windows, macOS, Linux, Command line	Web, Browser extension
Runs style checks in editors, scripts or continuous integration.	Style and line-editing feedback beyond basic grammar Story planning and critique tools for fiction
You need to choose or write the style rules it enforces.	Full feature set requires a paid plan Geared toward fiction, less so toward other writing
Downloadable app	Downloadable app, Web application, Browser extension
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	Account 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 23, 2026

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