# Calibre vs OpenPLC Runtime v4

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

| | Calibre | OpenPLC Runtime v4 |
|---|---|---|
| Score | 83/100 ✓ | 52/100 |
| Rank in category | #1 of 19 in Ebook Management | #6 of 10 in IoT |
| GitHub stars | 26 268 ✓ | 416 |
| Stars, last 30 days | +259 ✓ | +0 |
| Stable releases, 12 months | 18 ✓ | 10 |
| Latest release | v9.17.0 · 23 Oct 2026 ✓ | v4.3.1 · 13 Oct 2026 |
| Setup | Easy ✓ | Moderate |
| Official Docker image | No | Yes ✓ |
| License | GPL-3.0 | MIT |
| Main language | Python | Python |

## Which one should you pick?

Calibre scores 83/100 against 52/100 for OpenPLC Runtime v4, so it is the safer default.

Calibre ships more often: 18 stable releases in the past year, against 10 for OpenPLC Runtime v4.

If you want the quickest setup, Calibre is easier to run; OpenPLC Runtime v4 needs more configuration.

Calibre is growing faster right now (+259 stars in 30 days).

## Details

- [Calibre](https://selfhost.directory/project/calibre) (markdown: https://selfhost.directory/project/calibre.md)
- [OpenPLC Runtime v4](https://selfhost.directory/project/openplc-runtime) (markdown: https://selfhost.directory/project/openplc-runtime.md)

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Source: https://selfhost.directory/compare/calibre-vs-openplc-runtime