harnessvsOpenPLC Runtime v4
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| harness | OpenPLC Runtime v4 | |
|---|---|---|
| Score | 80/100 | 52/100 |
| Rank in category | #3 of 28 in CI/CD | #6 of 10 in IoT |
| GitHub stars | 38 756 | 418 |
| Stars, last 30 days | +322 | +2 |
| Stable releases, 12 months | 6 | 10 |
| Latest release | v2.28.2 · 20 Apr 2026 | v4.3.1 · 13 Oct 2026 |
| Setup | Easy | Moderate |
| Official Docker image | Yes | Yes |
| License | Apache-2.0 | MIT |
| Main language | Go | Python |
Which one should you pick?
harness scores 80/100 against 52/100 for OpenPLC Runtime v4, so it is the safer default.
OpenPLC Runtime v4 ships more often: 10 stable releases in the past year, against 6 for harness.
If you want the quickest setup, harness is easier to run; OpenPLC Runtime v4 needs more configuration.
harness is growing faster right now (+322 stars in 30 days).
harness details →OpenPLC Runtime v4 details →