# harness vs openGym

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

| | harness | openGym |
|---|---|---|
| Score | 80/100 | 81/100 ✓ |
| Rank in category | #3 of 28 in CI/CD | #1 of 11 in Fitness Tracker |
| GitHub stars | 38 745 ✓ | 16 965 |
| Stars, last 30 days | +318 | +2 796 ✓ |
| Stable releases, 12 months | 6 | 12 ✓ |
| Latest release | v2.28.2 · 20 Apr 2026 | v1.4.3 · 26 Oct 2026 ✓ |
| Setup | Easy | Easy |
| Official Docker image | Yes | Yes |
| License | Apache-2.0 | AGPL-3.0 |
| Main language | Go | JavaScript |

## Which one should you pick?

openGym scores 81/100 against 80/100 for harness, so it is the safer default.

openGym ships more often: 12 stable releases in the past year, against 6 for harness.

openGym is growing faster right now (+2 796 stars in 30 days).

## Details

- [harness](https://selfhost.directory/project/harness) (markdown: https://selfhost.directory/project/harness.md)
- [openGym](https://selfhost.directory/project/opengym) (markdown: https://selfhost.directory/project/opengym.md)

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Source: https://selfhost.directory/compare/harness-vs-opengym