head to head · open source
monaco-editor vs LanguageTool
monaco-editor has 46,944 GitHub stars, 4,167 forks, 859 open issues and last shipped yesterday. LanguageTool has 15,229 stars, 1,598 forks, 2,148 open issues and last shipped yesterday. monaco-editor leads on adoption by 208% (46,944 vs 15,229 stars). monaco-editor is written in JavaScript under MIT; LanguageTool is written in Java under LGPL-2.1. monaco-editor has attracted 9% as many forks as stars, LanguageTool 10%. monaco-editor 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
| monaco-editor | LanguageTool | |
|---|---|---|
| GitHub stars | ★ 47K | ★ 15K |
| License | MIT | LGPL-2.1 |
| Written in | JavaScript | Java |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 4.2K | ⑂ 1.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick monaco-editor if
- You weight community size — 47K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- 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 monaco-editor
Monaco Editor The Monaco Editor is the fully featured code editor from VS Code. Check out the VS Code docs to see some of the supported features. Try it out Try out the editor and see various examples in our interactive playground. The playground is the best way to learn about how to use the editor, which features is supports, to try out different versions and to create minimal reproducible examples for bug reports. Installing You will get: inside /esm : ESM version of the editor (compatible with e.g. webpack) monaco.d.ts : this specifies the API of the editor (this is what is actually versioned, everything else…
read the full monaco-editor 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 monaco-editor or LanguageTool more popular?
monaco-editor has 46,944 GitHub stars and LanguageTool has 15,229. monaco-editor has the larger community by that measure.
Are monaco-editor and LanguageTool free?
Both are open source. monaco-editor is licensed under MIT and LanguageTool under LGPL-2.1. Neither carries a licence fee.
What is the difference between monaco-editor and LanguageTool?
monaco-editor is written in JavaScript 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, monaco-editor or LanguageTool?
Choose monaco-editor if you want the larger community (46,944 stars) or its MIT licence terms. Choose LanguageTool if its feature set, stack or LGPL-2.1 licence fits better. Both are self-hostable.