CalibrevsConcat
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).
Calibre details →Concat details →
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