# Calibre vs UmlautAdaptarr

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

| | Calibre | UmlautAdaptarr |
|---|---|---|
| Score | 83/100 ✓ | 40/100 |
| Rank in category | #1 of 19 in Ebook Management | #120 of 142 in Media Management |
| GitHub stars | 26 267 ✓ | 309 |
| Stars, last 30 days | +268 | — |
| Stable releases, 12 months | 18 ✓ | 3 |
| Latest release | v9.17.0 · 23 Oct 2026 ✓ | v0.7.6 · 5 Aug 2026 |
| Setup | Easy ✓ | Moderate |
| Official Docker image | No | Yes ✓ |
| License | GPL-3.0 | — |
| Main language | Python | C |

## Which one should you pick?

Calibre scores 83/100 against 40/100 for UmlautAdaptarr, so it is the safer default.

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

If you want the quickest setup, Calibre is easier to run; UmlautAdaptarr needs more configuration.

Calibre is growing faster right now (+268 stars in 30 days).

## Details

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

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Source: https://selfhost.directory/compare/calibre-vs-umlautadaptarr