# Calibre Web vs scalar

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

| | Calibre Web | scalar |
|---|---|---|
| Score | 78/100 ✓ | 76/100 |
| Rank in category | #1 of 7 in E-book Management | #3 of 13 in API |
| GitHub stars | 18 488 ✓ | 16 337 |
| Stars, last 30 days | +248 ✓ | +148 |
| Stable releases, 12 months | 2 | 46 ✓ |
| Latest release | 0.6.27 · 8 Aug 2026 | release-2026-10-28-0d01943 · 28 Oct 2026 ✓ |
| Setup | Easy | Easy ✓ |
| Official Docker image | No | Yes ✓ |
| License | GPL-3.0 | MIT |
| Main language | Fluent | Typescript |

## Which one should you pick?

Calibre Web scores 78/100 against 76/100 for scalar, so it is the safer default.

scalar ships more often: 46 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)
- [scalar](https://selfhost.directory/project/scalar) (markdown: https://selfhost.directory/project/scalar.md)

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