# Calibre vs swarm-cronjob

> Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.

| | Calibre | swarm-cronjob |
|---|---|---|
| Score | 83/100 ✓ | 51/100 |
| Rank in category | #1 of 19 in Ebook Management | #20 of 26 in Automation |
| GitHub stars | 26 269 ✓ | 888 |
| Stars, last 30 days | +260 ✓ | +0 |
| Stable releases, 12 months | 18 ✓ | 3 |
| Latest release | v9.17.0 · 23 Oct 2026 | v1.16.1 · 24 Oct 2026 ✓ |
| Setup | Easy ✓ | Easy |
| Official Docker image | No | Yes ✓ |
| License | GPL-3.0 | MIT |
| Main language | Python | Go |

## Which one should you pick?

Calibre scores 83/100 against 51/100 for swarm-cronjob, so it is the safer default.

Calibre ships more often: 18 stable releases in the past year, against 3 for swarm-cronjob.

Calibre is growing faster right now (+260 stars in 30 days).

## Details

- [Calibre](https://selfhost.directory/project/calibre) (markdown: https://selfhost.directory/project/calibre.md)
- [swarm-cronjob](https://selfhost.directory/project/swarm-cronjob) (markdown: https://selfhost.directory/project/swarm-cronjob.md)

---
Source: https://selfhost.directory/compare/calibre-vs-swarm-cronjob