head to head · open source
calibre vs TranslateBooksWithLLMs
calibre has 26,327 GitHub stars, 2,743 forks, 6 open issues and last shipped yesterday. TranslateBooksWithLLMs has 2,567 stars, 340 forks, 23 open issues and last shipped yesterday. calibre leads on adoption by 926% (26,327 vs 2,567 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 | ★ 2.6K |
| License | GPL-3.0 | AGPL-3.0 |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 2.7K | ⑂ 340 |
| 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 calibre is an e book manager. It can view, convert, edit and catalog e books in all of the major e book formats. It can also talk to e book reader devices. It can go out to the internet and fetch metadata for your books. It can download newspapers and convert them into e books for convenient reading. It is cross platform, running on Linux, Windows and macOS. For more information, see the calibre About page. Screenshots Screenshots page Usage See the User Manual. Development Setting up a development environment for calibre. A tarball of the source code for the current calibre release. Bugs Bug reports and…
read the full calibre overview →
About TranslateBooksWithLLMs
TBL Translate Books with LLMs A desktop app that translates books , subtitles , and documents with AI local or cloud. Drop a file, pick a language, get the result. Formats: EPUB, SRT, DOCX, TXT No size limit. Process documents of any length from a single page to thousand page novels. The intelligent chunking system handles unlimited content while preserving context between segments. Perfect preservation. Your documents come out exactly as they went in: EPUB formatting, styles, and structure remain intact. SRT timecodes stay perfectly synchronized. Every tag, every timestamp, every formatting detail is preserved…
read the full TranslateBooksWithLLMs overview →
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Frequently asked questions
Is calibre or TranslateBooksWithLLMs more popular?
calibre has 26,327 GitHub stars and TranslateBooksWithLLMs has 2,567. 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 (26,327 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.