head to head · open source
serenity vs LanguageTool
serenity has 33,840 GitHub stars, 3,541 forks, 739 open issues and last shipped yesterday. LanguageTool has 15,042 stars, 1,581 forks, 2,148 open issues and last shipped yesterday. serenity leads on adoption by 125% (33,840 vs 15,042 stars). serenity is written in C++ under BSD-2-Clause; LanguageTool is written in Java under LGPL-2.1. serenity has attracted 10% 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
| serenity | LanguageTool | |
|---|---|---|
| GitHub stars | ★ 34K | ★ 15K |
| License | BSD-2-Clause | LGPL-2.1 |
| Written in | C++ | Java |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 3.5K | ⑂ 1.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick serenity if
- You weight community size — 34K stars and counting
- You want the BSD-2-Clause license terms
- Your stack matches C++
- 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 serenity
SerenityOS is a graphical Unix like operating system built for 64 bit x86, Arm, and RISC V computers. It is written in C++ and released under the BSD 2 Clause license, and it lives in the open source operating system ecosystem alongside other hobbyist and research kernels. The project describes itself as a love letter to 1990s user interfaces paired with a custom Unix like core, aiming for a marriage between the aesthetic of late 1990s productivity software and the power user accessibility of late 2000s Unix systems.
read the full serenity 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 serenity or LanguageTool more popular?
serenity has 33,840 GitHub stars and LanguageTool has 15,042. serenity has the larger community by that measure.
Are serenity and LanguageTool free?
Both are open source. serenity is licensed under BSD-2-Clause and LanguageTool under LGPL-2.1. Neither carries a licence fee.
What is the difference between serenity and LanguageTool?
serenity is written in C++ 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, serenity or LanguageTool?
Choose serenity if you want the larger community (33,840 stars) or its BSD-2-Clause licence terms. Choose LanguageTool if its feature set, stack or LGPL-2.1 licence fits better. Both are self-hostable.