head to head · open source
calibre-web vs TranslateBooksWithLLMs
calibre-web has 18,216 GitHub stars, 1,863 forks, 409 open issues and last shipped yesterday. TranslateBooksWithLLMs has 2,424 stars, 319 forks, 23 open issues and last shipped 3 days ago. calibre-web leads on adoption by 651% (18,216 vs 2,424 stars). calibre-web is written in Fluent under GPL-3.0; TranslateBooksWithLLMs is written in Python under AGPL-3.0. calibre-web has attracted 10% as many forks as stars, TranslateBooksWithLLMs 13%. calibre-web was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (epub), so they are genuine substitutes rather than adjacent tools.
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 | TranslateBooksWithLLMs | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 2.4K |
| License | GPL-3.0 | AGPL-3.0 |
| Written in | Fluent | Python |
| Last push | 2026-09-19 | 2026-09-17 |
| Forks | ⑂ 1.9K | ⑂ 319 |
| 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 TranslateBooksWithLLMs if
- You want the TranslateBooksWithLLMs 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 TranslateBooksWithLLMs 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 TranslateBooksWithLLMs
TranslateBooksWithLLMs is a Python desktop application under AGPL 3.0 for translating full length books, documents, and subtitle files with large language models. It lives in the Content and Publishing ecosystem, specifically around ebook translation, document localization, and publishing related workflows. The project ships as a local app that opens a browser interface at http://localhost:5000 after the bundled executable is run.
read the full TranslateBooksWithLLMs overview →
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Frequently asked questions
Is calibre-web or TranslateBooksWithLLMs more popular?
calibre-web has 18,216 GitHub stars and TranslateBooksWithLLMs has 2,424. calibre-web has the larger community by that measure.
Are calibre-web and TranslateBooksWithLLMs free?
Both are open source. calibre-web is licensed under GPL-3.0 and TranslateBooksWithLLMs under AGPL-3.0. Neither carries a licence fee.
What is the difference between calibre-web and TranslateBooksWithLLMs?
calibre-web is written in Fluent and TranslateBooksWithLLMs 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 TranslateBooksWithLLMs?
Choose calibre-web if you want the larger community (18,216 stars) or its GPL-3.0 licence terms. Choose TranslateBooksWithLLMs if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.