# Calibre Web vs Concat

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

| | Calibre Web | Concat |
|---|---|---|
| Score | 78/100 | 82/100 ✓ |
| Rank in category | #1 of 7 in E-book Management | #1 of 18 in Video Processing |
| GitHub stars | 18 486 ✓ | 12 421 |
| Stars, last 30 days | +255 | +2 422 ✓ |
| Stable releases, 12 months | 2 | 6 ✓ |
| Latest release | 0.6.27 · 8 Aug 2026 | v0.2.8 · 20 Oct 2026 ✓ |
| Setup | Easy | Easy ✓ |
| Official Docker image | No | No |
| License | GPL-3.0 | AGPL-3.0 |
| Main language | Fluent | Rust |

## Which one should you pick?

Concat scores 82/100 against 78/100 for Calibre Web, so it is the safer default.

Concat ships more often: 6 stable releases in the past year, against 2 for Calibre Web.

Concat is growing faster right now (+2 422 stars in 30 days).

## Details

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

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