head to head · open source
slate vs LanguageTool
slate has 31,747 GitHub stars, 3,306 forks, 653 open issues and last shipped 6 days ago. LanguageTool has 15,229 stars, 1,598 forks, 2,148 open issues and last shipped yesterday. slate leads on adoption by 108% (31,747 vs 15,229 stars). slate is written in TypeScript under MIT; LanguageTool is written in Java under LGPL-2.1. slate has attracted 10% as many forks as stars, LanguageTool 10%. LanguageTool was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| slate | LanguageTool | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 15K |
| License | MIT | LGPL-2.1 |
| Written in | TypeScript | Java |
| Last push | 2026-10-28 | 2026-11-02 |
| Forks | ⑂ 3.3K | ⑂ 1.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick slate if
- You weight community size — 32K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick LanguageTool if
- You want the LanguageTool feature set and don't need the biggest community
- You prefer the LGPL-2.1 license terms
- Your stack matches Java
- You evaluated both and LanguageTool fits your workflow better
About slate
A completely customizable framework for building rich text editors. Why? · Principles · Demo · Examples · Documentation · Contributing! Slate lets you build rich, intuitive editors like those in Medium, Dropbox Paper or Google Docs—which are becoming table stakes for applications on the web—without your codebase getting mired in complexity. It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what is or isn't in "core". You can think of it like a pluggable implementation of contenteditable built on top of React. It was inspired by libraries like…
read the full slate overview →
About LanguageTool
LanguageTool LanguageTool is open source proofreading software for English, Spanish, French, German, Portuguese, Polish, Dutch, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect. LanguageTool Forum How to run your own LanguageTool server HTTP API documentation How to use our public server via HTTP How to use LanguageTool from Java (Javadoc) For more information, please see our homepage, at languagetool.org , this README , and CHANGES . The LanguageTool core (this repo) is freely available under the LGPL 2.1 or later. Docker Try one of the following projects for a…
read the full LanguageTool overview →
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Frequently asked questions
Is slate or LanguageTool more popular?
slate has 31,747 GitHub stars and LanguageTool has 15,229. slate has the larger community by that measure.
Are slate and LanguageTool free?
Both are open source. slate is licensed under MIT and LanguageTool under LGPL-2.1. Neither carries a licence fee.
What is the difference between slate and LanguageTool?
slate is written in TypeScript and LanguageTool in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, slate or LanguageTool?
Choose slate if you want the larger community (31,747 stars) or its MIT licence terms. Choose LanguageTool if its feature set, stack or LGPL-2.1 licence fits better. Both are self-hostable.