head to head · open source
ebook2audiobook vs calibre-web
ebook2audiobook has 20,198 GitHub stars, 1,728 forks, 4 open issues and last shipped yesterday. calibre-web has 18,198 stars, 1,860 forks, 409 open issues and last shipped 13 days ago. ebook2audiobook leads on adoption by 11% (20,198 vs 18,198 stars). ebook2audiobook is written in Python under Apache-2.0; calibre-web is written in Fluent under GPL-3.0. ebook2audiobook has attracted 9% as many forks as stars, calibre-web 10%. ebook2audiobook 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
| ebook2audiobook | calibre-web | |
|---|---|---|
| GitHub stars | ★ 20K | ★ 18K |
| License | Apache-2.0 | GPL-3.0 |
| Written in | Python | Fluent |
| Last push | 2026-09-17 | 2026-09-05 |
| Forks | ⑂ 1.7K | ⑂ 1.9K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ebook2audiobook if
- You weight community size — 20K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick calibre-web if
- You want the calibre-web feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Fluent
- You evaluated both and calibre-web fits your workflow better
About ebook2audiobook
ebook2audiobook (E2A) is an open source Python tool that converts e books into audiobooks with chapters and metadata, using advanced text to speech engines. It supports voice cloning and 1158 languages, and runs on CPU or GPU. The project lives in the Python ecosystem, is licensed under Apache 2.0, and carries topics covering audiobook, TTS, voice cloning, multilingual output, Gradio, Docker, and XTTS. It has been on GitHub for three years and holds roughly 20,175 stars and 1,727 forks.
read the full ebook2audiobook overview →
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 →
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Frequently asked questions
Is ebook2audiobook or calibre-web more popular?
ebook2audiobook has 20,198 GitHub stars and calibre-web has 18,198. ebook2audiobook has the larger community by that measure.
Are ebook2audiobook and calibre-web free?
Both are open source. ebook2audiobook is licensed under Apache-2.0 and calibre-web under GPL-3.0. Neither carries a licence fee.
What is the difference between ebook2audiobook and calibre-web?
ebook2audiobook is written in Python and calibre-web in Fluent. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, ebook2audiobook or calibre-web?
Choose ebook2audiobook if you want the larger community (20,198 stars) or its Apache-2.0 licence terms. Choose calibre-web if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.