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Vale vs LanguageTool: catalog facts
Vale	LanguageTool
Free The open-source software is available without a license fee. Hosting, hardware and…	Freemium A free tier is available and the engine is open source. Premium features are paid.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Web, Self-hosted, Browser extension
Runs style checks in editors, scripts or continuous integration.	The checking engine is open source and can be self-hosted offline Covers far more languages than most grammar checkers
You need to choose or write the style rules it enforces.	The hosted service sends your text to their servers unless you self-host Advanced style suggestions and long texts need a paid plan
Downloadable app	Browser extension, Downloadable app, Self-hosted
Open source	Open source
License: MIT	License: LGPL-2.1
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 22, 2026

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