CalibrevsZealot
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Calibre | Zealot | |
|---|---|---|
| Score | 83/100 | 55/100 |
| Rank in category | #1 of 19 in Ebook Management | #17 of 28 in CI/CD |
| GitHub stars | 26 267 | 1 366 |
| Stars, last 30 days | +268 | — |
| Stable releases, 12 months | 18 | 3 |
| Latest release | v9.17.0 · 23 Oct 2026 | 6.2.2 · 25 Jul 2026 |
| Setup | Easy | Moderate |
| Official Docker image | No | Yes |
| License | GPL-3.0 | MIT |
| Main language | Python | Ruby |
Which one should you pick?
Calibre scores 83/100 against 55/100 for Zealot, so it is the safer default.
Calibre ships more often: 18 stable releases in the past year, against 3 for Zealot.
If you want the quickest setup, Calibre is easier to run; Zealot needs more configuration.
Calibre is growing faster right now (+268 stars in 30 days).
Calibre details →Zealot details →
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