head to head · open source
calibre-web vs yomiyasu
calibre-web has 18,334 GitHub stars, 1,880 forks, 409 open issues and last shipped 4 days ago. yomiyasu has 1,589 stars, 36 forks, 3 open issues and last shipped yesterday. calibre-web leads on adoption by 1,054% (18,334 vs 1,589 stars). calibre-web is written in Fluent under GPL-3.0; yomiyasu is written in Python under MIT. calibre-web has attracted 10% as many forks as stars, yomiyasu 2%. yomiyasu was the more recently maintained of the two, and both are self-hostable with no licence fee.
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 | yomiyasu | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 1.6K |
| License | GPL-3.0 | MIT |
| Written in | Fluent | Python |
| Last push | 2026-10-03 | 2026-10-06 |
| Forks | ⑂ 1.9K | ⑂ 36 |
| 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 yomiyasu if
- You want the yomiyasu feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and yomiyasu 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 yomiyasu
yomiyasu is an Agent Skill that rewrites AI generated Japanese into natural, readable prose, for writers, engineers and editors who draft technical articles, design documents, pull request descriptions and internal reports with LLMs.
read the full yomiyasu overview →
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Frequently asked questions
Is calibre-web or yomiyasu more popular?
calibre-web has 18,334 GitHub stars and yomiyasu has 1,589. calibre-web has the larger community by that measure.
Are calibre-web and yomiyasu free?
Both are open source. calibre-web is licensed under GPL-3.0 and yomiyasu under MIT. Neither carries a licence fee.
What is the difference between calibre-web and yomiyasu?
calibre-web is written in Fluent and yomiyasu 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 yomiyasu?
Choose calibre-web if you want the larger community (18,334 stars) or its GPL-3.0 licence terms. Choose yomiyasu if its feature set, stack or MIT licence fits better. Both are self-hostable.