head to head · open source
calibre-web vs Weblate
calibre-web has 18,216 GitHub stars, 1,863 forks, 409 open issues and last shipped yesterday. Weblate has 6,080 stars, 1,359 forks, 493 open issues and last shipped yesterday. calibre-web leads on adoption by 200% (18,216 vs 6,080 stars). calibre-web is written in Fluent under GPL-3.0; Weblate is written in Python under GPL-3.0. calibre-web has attracted 10% as many forks as stars, Weblate 22%. calibre-web 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 | Weblate | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 6.1K |
| License | GPL-3.0 | GPL-3.0 |
| Written in | Fluent | Python |
| Last push | 2026-09-19 | 2026-09-19 |
| Forks | ⑂ 1.9K | ⑂ 1.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick calibre-web if
- You weight community size — 18K 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 Weblate if
- You want the Weblate feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Python
- You evaluated both and Weblate fits your workflow better
About calibre-web
Calibre Web is a web application that provides a clean and intuitive interface for browsing, reading, and downloading eBooks from a valid Calibre database. It is a fork of the library project (calibreserver) and is licensed under the GPL v3. The project lives in the Calibre ecosystem, and it is distributed through PyPI as the calibreweb package as well as through Docker images. It has been developed for over eleven years and carries roughly 18,183 stars and 1,856 forks on GitHub.
read the full calibre-web overview →
About Weblate
Weblate is a libre, web based continuous localization system — a Python and Django application that connects translators to version control so translation happens alongside the code it belongs to, and it is used by more than 2,500 libre projects and companies in over 165 countries.
read the full Weblate overview →
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Frequently asked questions
Is calibre-web or Weblate more popular?
calibre-web has 18,216 GitHub stars and Weblate has 6,080. calibre-web has the larger community by that measure.
Are calibre-web and Weblate free?
Both are open source. calibre-web is licensed under GPL-3.0 and Weblate under GPL-3.0. Neither carries a licence fee.
What is the difference between calibre-web and Weblate?
calibre-web is written in Fluent and Weblate 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 Weblate?
Choose calibre-web if you want the larger community (18,216 stars) or its GPL-3.0 licence terms. Choose Weblate if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.