# Calibre Web vs harness

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

| | Calibre Web | harness |
|---|---|---|
| Score | 78/100 | 80/100 ✓ |
| Rank in category | #1 of 7 in E-book Management | #3 of 28 in CI/CD |
| GitHub stars | 18 486 | 38 746 ✓ |
| Stars, last 30 days | +255 | +319 ✓ |
| Stable releases, 12 months | 2 | 6 ✓ |
| Latest release | 0.6.27 · 8 Aug 2026 ✓ | v2.28.2 · 20 Apr 2026 |
| Setup | Easy | Easy |
| Official Docker image | No | Yes ✓ |
| License | GPL-3.0 | Apache-2.0 |
| Main language | Fluent | Go |

## Which one should you pick?

harness scores 80/100 against 78/100 for Calibre Web, so it is the safer default.

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

## Details

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

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