head to head · open source
koodo-reader vs calibre-web
koodo-reader has 28,699 GitHub stars, 2,148 forks, 271 open issues and last shipped 2 days ago. calibre-web has 18,524 stars, 1,899 forks, 409 open issues and last shipped 24 days ago. koodo-reader leads on adoption by 55% (28,699 vs 18,524 stars). koodo-reader is written in JavaScript under AGPL-3.0; calibre-web is written in Fluent under GPL-3.0. koodo-reader has attracted 7% as many forks as stars, calibre-web 10%. koodo-reader was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ebook, 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
| koodo-reader | calibre-web | |
|---|---|---|
| GitHub stars | ★ 29K | ★ 19K |
| License | AGPL-3.0 | GPL-3.0 |
| Written in | JavaScript | Fluent |
| Last push | 2026-11-01 | 2026-10-10 |
| Forks | ⑂ 2.1K | ⑂ 1.9K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick koodo-reader if
- You weight community size — 29K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches JavaScript
- 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 koodo-reader
简体中文 हिंदी Português Indonesian English Türkçe Koodo Reader A cross platform ebook reader Download Preview Roadmap Document Plugins Preview Features Format support: EPUB ( .epub ) PDF ( .pdf ) DRM free Mobipocket ( .mobi ) and Kindle ( .azw3 , .azw ) Plain text ( .txt ) FictionBook ( .fb2 ) Comic book archive ( .cbr , .cbz , .cbt , .cb7 ) Rich text ( .md , .docx ) HyperText ( .html , .xml , .xhtml , .mhtml , .htm ) Platform support: Windows , macOS , Linux , Android , iOS and Web Sync and backup your data with OneDrive , Google Drive , Dropbox , iCloud , MEGA , pCloud , Yandex Disk , Box , FTP , SFTP , WebDAV…
read the full koodo-reader overview →
About calibre-web
Calibre Web Calibre Web is a web app that offers a clean and intuitive interface for browsing, reading, and downloading eBooks using a valid Calibre database. Table of Contents (click to expand) 1. About 2. Features 3. Installation Installation via pip (recommended) Quick start Requirements 4. Docker Images 5. Troubleshooting 6. Contributor Recognition 7. Contact 8. Contributing to Calibre Web This software is a fork of library and licensed under the GPL v3 License. Features Modern and responsive Bootstrap 3 HTML5 interface Full graphical setup Comprehensive user management with fine grained per user permissions…
read the full calibre-web overview →
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Frequently asked questions
Is koodo-reader or calibre-web more popular?
koodo-reader has 28,699 GitHub stars and calibre-web has 18,524. koodo-reader has the larger community by that measure.
Are koodo-reader and calibre-web free?
Both are open source. koodo-reader is licensed under AGPL-3.0 and calibre-web under GPL-3.0. Neither carries a licence fee.
What is the difference between koodo-reader and calibre-web?
koodo-reader is written in JavaScript 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, koodo-reader or calibre-web?
Choose koodo-reader if you want the larger community (28,699 stars) or its AGPL-3.0 licence terms. Choose calibre-web if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.