Calibrevscobalt
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Calibre | cobalt | |
|---|---|---|
| Score | 83/100 | 83/100 |
| Rank in category | #1 of 19 in Ebook Management | #1 of 45 in Download Management |
| GitHub stars | 26 270 | 45 589 |
| Stars, last 30 days | +271 | +1 805 |
| Stable releases, 12 months | 18 | 0 |
| Latest release | v9.17.0 · 23 Oct 2026 | — |
| Setup | Easy | Easy |
| Official Docker image | No | Yes |
| License | GPL-3.0 | AGPL-3.0 |
| Main language | Python | Svelte |
Which one should you pick?
Calibre and cobalt score the same (83/100), so the choice comes down to the details below.
Calibre ships more often: 18 stable releases in the past year, against 0 for cobalt.
cobalt is growing faster right now (+1 805 stars in 30 days).
Calibre details →cobalt details →
Swap a project
Keep Calibre, compare it with
Keep cobalt, compare it with