# Calibre vs Concat

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

| | Calibre | Concat |
|---|---|---|
| Score | 83/100 ✓ | 82/100 |
| Rank in category | #1 of 19 in Ebook Management | #1 of 18 in Video Processing |
| GitHub stars | 26 269 ✓ | 12 397 |
| Stars, last 30 days | +270 | +2 398 ✓ |
| Stable releases, 12 months | 18 ✓ | 6 |
| Latest release | v9.17.0 · 23 Oct 2026 ✓ | v0.2.8 · 20 Oct 2026 |
| Setup | Easy | Easy ✓ |
| Official Docker image | No | No |
| License | GPL-3.0 | AGPL-3.0 |
| Main language | Python | Rust |

## Which one should you pick?

Calibre scores 83/100 against 82/100 for Concat, so it is the safer default.

Calibre ships more often: 18 stable releases in the past year, against 6 for Concat.

Concat is growing faster right now (+2 398 stars in 30 days).

## Details

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

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