head to head · open source
calibre vs Languine
calibre has 25,923 GitHub stars, 2,690 forks, 6 open issues and last shipped yesterday. Languine has 2,035 stars, 133 forks, 10 open issues and last shipped 4 months ago. calibre leads on adoption by 1,174% (25,923 vs 2,035 stars). calibre is written in Python under GPL-3.0; Languine is written in TypeScript under MIT. calibre has attracted 10% as many forks as stars, Languine 7%. calibre 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
| calibre | Languine | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 2.0K |
| License | GPL-3.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-05-09 |
| Forks | ⑂ 2.7K | ⑂ 133 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick calibre if
- You weight community size — 26K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Languine if
- You want the Languine feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and Languine fits your workflow better
About calibre
calibre is the official source code repository for the calibre e book manager, an open source application written in Python and released under GPL 3.0. It lives in the content and publishing ecosystem as a desktop tool for books, and it is cross platform, running on Linux, Windows and macOS. The project has been hosted on GitHub for roughly thirteen years, carries about 25,900 stars and 2,683 forks, and its home on the web is calibre ebook.com, where an About page and a screenshots page document it further.
read the full calibre overview →
About Languine
Languine is a self hosted, Vercel native localization tool for application text. It lives in the TypeScript and Vercel ecosystem, and it uses a CLI plus a dashboard to translate project strings with an AI model. The concrete problem it solves is repetitive manual localization: a team can point the CLI at a project, create a project record on its own deployment, and run a translate command instead of maintaining every language file by hand.
read the full Languine overview →
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Frequently asked questions
Is calibre or Languine more popular?
calibre has 25,923 GitHub stars and Languine has 2,035. calibre has the larger community by that measure.
Are calibre and Languine free?
Both are open source. calibre is licensed under GPL-3.0 and Languine under MIT. Neither carries a licence fee.
What is the difference between calibre and Languine?
calibre is written in Python and Languine in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, calibre or Languine?
Choose calibre if you want the larger community (25,923 stars) or its GPL-3.0 licence terms. Choose Languine if its feature set, stack or MIT licence fits better. Both are self-hostable.