head to head · open source
lerna vs calibre
lerna has 36,041 GitHub stars, 2,269 forks, 287 open issues and last shipped 3 days ago. calibre has 26,327 stars, 2,743 forks, 6 open issues and last shipped yesterday. lerna leads on adoption by 37% (36,041 vs 26,327 stars). lerna is written in TypeScript under MIT; calibre is written in Python under GPL-3.0. lerna has attracted 6% as many forks as stars, calibre 10%. calibre 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
| lerna | calibre | |
|---|---|---|
| GitHub stars | ★ 36K | ★ 26K |
| License | MIT | GPL-3.0 |
| Written in | TypeScript | Python |
| Last push | 2026-10-31 | 2026-11-02 |
| Forks | ⑂ 2.3K | ⑂ 2.7K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick lerna if
- You weight community size — 36K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick calibre if
- You want the calibre feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Python
- You evaluated both and calibre fits your workflow better
About lerna
Important note: this project changed stewardship to Nx! Your favorite tool is alive and well: Lerna is a fast, modern build system for managing and publishing multiple JavaScript/TypeScript packages from the same repository. A few links to help you get started: lerna.js.org: Documentation, Guides, Interactive Tutorials Getting Started Features Official Nx and Lerna YouTube Channel Blog Posts About Lerna and Nx Engage with the Core Team and the Community Follow Lerna on Twitter Community Discord, forum channel Want to help? If you want to file a bug or submit a PR, read up on our guidelines for contributing Core…
read the full lerna overview →
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 →
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Frequently asked questions
Is lerna or calibre more popular?
lerna has 36,041 GitHub stars and calibre has 26,327. lerna has the larger community by that measure.
Are lerna and calibre free?
Both are open source. lerna is licensed under MIT and calibre under GPL-3.0. Neither carries a licence fee.
What is the difference between lerna and calibre?
lerna is written in TypeScript and calibre 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, lerna or calibre?
Choose lerna if you want the larger community (36,041 stars) or its MIT licence terms. Choose calibre if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.