head to head · open source
calibre-web vs LibreTranslate
calibre-web has 18,530 GitHub stars, 1,902 forks, 409 open issues and last shipped 26 days ago. LibreTranslate has 17,269 stars, 1,794 forks, 126 open issues and last shipped 10 days ago. calibre-web leads on adoption by 7% (18,530 vs 17,269 stars). calibre-web is written in Fluent under GPL-3.0; LibreTranslate is written in Python under AGPL-3.0. calibre-web has attracted 10% as many forks as stars, LibreTranslate 10%. LibreTranslate 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-web | LibreTranslate | |
|---|---|---|
| GitHub stars | ★ 19K | ★ 17K |
| License | GPL-3.0 | AGPL-3.0 |
| Written in | Fluent | Python |
| Last push | 2026-10-10 | 2026-10-26 |
| Forks | ⑂ 1.9K | ⑂ 1.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick calibre-web if
- You weight community size — 19K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Fluent
- You value the larger contributor base for long-term maintenance
pick LibreTranslate if
- You want the LibreTranslate feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and LibreTranslate fits your workflow better
About calibre-web
Calibre Web Calibre Web is a web app that offers a clean and intuitive interface for browsing, reading, and downloading eBooks using a valid Calibre database. Table of Contents (click to expand) 1. About 2. Features 3. Installation Installation via pip (recommended) Quick start Requirements 4. Docker Images 5. Troubleshooting 6. Contributor Recognition 7. Contact 8. Contributing to Calibre Web This software is a fork of library and licensed under the GPL v3 License. Features Modern and responsive Bootstrap 3 HTML5 interface Full graphical setup Comprehensive user management with fine grained per user permissions…
read the full calibre-web overview →
About LibreTranslate
LibreTranslate Try it online! API Docs Community Forum Bluesky Free and Open Source Machine Translation API, entirely self hosted. Unlike other APIs, it doesn't rely on proprietary software such as Google or Azure to perform translations. Instead, its translation engine is powered by the open source Argos Translate library. Getting Started Quickstart Usage Instructions Community Resources Credits This work is largely possible thanks to Argos Translate, which powers the translation engine. License GNU Affero General Public License v3 Trademark See Trademark Guidelines
read the full LibreTranslate overview →
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Frequently asked questions
Is calibre-web or LibreTranslate more popular?
calibre-web has 18,530 GitHub stars and LibreTranslate has 17,269. calibre-web has the larger community by that measure.
Are calibre-web and LibreTranslate free?
Both are open source. calibre-web is licensed under GPL-3.0 and LibreTranslate under AGPL-3.0. Neither carries a licence fee.
What is the difference between calibre-web and LibreTranslate?
calibre-web is written in Fluent and LibreTranslate in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, calibre-web or LibreTranslate?
Choose calibre-web if you want the larger community (18,530 stars) or its GPL-3.0 licence terms. Choose LibreTranslate if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.