head to head · open source
calibre vs ebook2audiobook
calibre has 26,327 GitHub stars, 2,743 forks, 6 open issues and last shipped yesterday. ebook2audiobook has 20,483 stars, 1,746 forks, 4 open issues and last shipped 28 days ago. calibre leads on adoption by 29% (26,327 vs 20,483 stars). calibre is written in Python under GPL-3.0; ebook2audiobook is written in Python under Apache-2.0. calibre has attracted 10% as many forks as stars, ebook2audiobook 9%. 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 | ebook2audiobook | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 20K |
| License | GPL-3.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-10-06 |
| Forks | ⑂ 2.7K | ⑂ 1.7K |
| 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 ebook2audiobook if
- You want the ebook2audiobook feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and ebook2audiobook 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 ebook2audiobook
📚 ebook2audiobook (E2A) CPU/GPU Converter from E Book to audiobook with chapters and metadata using advanced TTS engines and much more. Supports voice cloning and 1158 languages! [!IMPORTANT] This tool is intended for use with non DRM, legally acquired eBooks only. The authors are not responsible for any misuse of this software or any resulting legal consequences. Use this tool responsibly and in accordance with all applicable laws. Thanks to support ebook2audiobook developers! Run locally Run Remotely GUI Interface Click to see images of Web GUI Demos New Default Voice Demo More Demos ASMR Voice Rainy Day…
read the full ebook2audiobook overview →
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Frequently asked questions
Is calibre or ebook2audiobook more popular?
calibre has 26,327 GitHub stars and ebook2audiobook has 20,483. calibre has the larger community by that measure.
Are calibre and ebook2audiobook free?
Both are open source. calibre is licensed under GPL-3.0 and ebook2audiobook under Apache-2.0. Neither carries a licence fee.
What is the difference between calibre and ebook2audiobook?
calibre is written in Python and ebook2audiobook 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 ebook2audiobook?
Choose calibre if you want the larger community (26,327 stars) or its GPL-3.0 licence terms. Choose ebook2audiobook if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.