Calibre WebvsConcat
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).
Calibre Web details →Concat details →
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