Calibre Webvscobalt
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Calibre Web | cobalt | |
|---|---|---|
| Score | 78/100 | 83/100 |
| Rank in category | #1 of 7 in E-book Management | #1 of 45 in Download Management |
| GitHub stars | 18 487 | 45 597 |
| Stars, last 30 days | +247 | +1 787 |
| Stable releases, 12 months | 2 | 0 |
| Latest release | 0.6.27 · 8 Aug 2026 | — |
| Setup | Easy | Easy |
| Official Docker image | No | Yes |
| License | GPL-3.0 | AGPL-3.0 |
| Main language | Fluent | Svelte |
Which one should you pick?
cobalt scores 83/100 against 78/100 for Calibre Web, so it is the safer default.
Calibre Web ships more often: 2 stable releases in the past year, against 0 for cobalt.
cobalt is growing faster right now (+1 787 stars in 30 days).
Calibre Web details →cobalt details →
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