# OpenPLC Runtime v4 vs Zot Registry

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

| | OpenPLC Runtime v4 | Zot Registry |
|---|---|---|
| Score | 52/100 | 64/100 ✓ |
| Rank in category | #6 of 10 in IoT | #3 of 12 in Container Registry |
| GitHub stars | 418 | 2 923 ✓ |
| Stars, last 30 days | +2 | +121 ✓ |
| Stable releases, 12 months | 10 | 12 ✓ |
| Latest release | v4.3.1 · 13 Oct 2026 ✓ | v2.1.22 · 6 Oct 2026 |
| Setup | Moderate | Moderate |
| Official Docker image | Yes | Yes |
| License | MIT | Apache-2.0 |
| Main language | Python | Go |

## Which one should you pick?

Zot Registry scores 64/100 against 52/100 for OpenPLC Runtime v4, so it is the safer default.

Zot Registry ships more often: 12 stable releases in the past year, against 10 for OpenPLC Runtime v4.

Zot Registry is growing faster right now (+121 stars in 30 days).

## Details

- [OpenPLC Runtime v4](https://selfhost.directory/project/openplc-runtime) (markdown: https://selfhost.directory/project/openplc-runtime.md)
- [Zot Registry](https://selfhost.directory/project/zot-registry) (markdown: https://selfhost.directory/project/zot-registry.md)

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