head to head · open source
calibre vs TranslateBooksWithLLMs
calibre has 25,923 GitHub stars, 2,690 forks, 6 open issues and last shipped yesterday. TranslateBooksWithLLMs has 2,416 stars, 319 forks, 23 open issues and last shipped yesterday. calibre leads on adoption by 973% (25,923 vs 2,416 stars). calibre is written in Python under GPL-3.0; TranslateBooksWithLLMs is written in Python under AGPL-3.0. calibre has attracted 10% as many forks as stars, TranslateBooksWithLLMs 13%. calibre 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 | TranslateBooksWithLLMs | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 2.4K |
| License | GPL-3.0 | AGPL-3.0 |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 2.7K | ⑂ 319 |
| 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 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
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 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 or TranslateBooksWithLLMs more popular?
calibre has 25,923 GitHub stars and TranslateBooksWithLLMs has 2,416. calibre has the larger community by that measure.
Are calibre and TranslateBooksWithLLMs free?
Both are open source. calibre is licensed under GPL-3.0 and TranslateBooksWithLLMs under AGPL-3.0. Neither carries a licence fee.
What is the difference between calibre and TranslateBooksWithLLMs?
calibre is written in Python 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 or TranslateBooksWithLLMs?
Choose calibre if you want the larger community (25,923 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.