head to head · open source
feathers vs LanguageTool
feathers has 15,263 GitHub stars, 798 forks, 121 open issues and last shipped 7 days ago. LanguageTool has 15,042 stars, 1,581 forks, 2,148 open issues and last shipped yesterday. feathers leads on adoption by 1% (15,263 vs 15,042 stars). feathers is written in TypeScript under MIT; LanguageTool is written in Java under LGPL-2.1. feathers has attracted 5% as many forks as stars, LanguageTool 11%. 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
| feathers | LanguageTool | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 15K |
| License | MIT | LGPL-2.1 |
| Written in | TypeScript | Java |
| Last push | 2026-09-11 | 2026-09-17 |
| Forks | ⑂ 798 | ⑂ 1.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick feathers if
- You weight community size — 15K 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 feathers
Feathers is a full stack framework for creating web APIs and real time applications with TypeScript or JavaScript. It lives in the Node.js and npm ecosystem, and it is published as a set of packages, with the core available as @feathersjs/feathers . The project has existed for roughly 15 years and is maintained under the MIT license by its contributors.
read the full feathers overview →
About LanguageTool
LanguageTool is open source proofreading software for English, Spanish, French, German, Portuguese, Polish, Dutch, and more than 20 other languages. Its tagline describes it as an AI powered grammar checker for 30+ languages, while the repository description calls it a style and grammar checker for 25+ languages. The project lives in the natural language processing and productivity ecosystem, where it helps writers, editors, and applications detect errors that a simple spell checker cannot find.
read the full LanguageTool overview →
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Frequently asked questions
Is feathers or LanguageTool more popular?
feathers has 15,263 GitHub stars and LanguageTool has 15,042. feathers has the larger community by that measure.
Are feathers and LanguageTool free?
Both are open source. feathers is licensed under MIT and LanguageTool under LGPL-2.1. Neither carries a licence fee.
What is the difference between feathers and LanguageTool?
feathers 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, feathers or LanguageTool?
Choose feathers if you want the larger community (15,263 stars) or its MIT licence terms. Choose LanguageTool if its feature set, stack or LGPL-2.1 licence fits better. Both are self-hostable.