# openGym vs Transformer Lab

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

| | openGym | Transformer Lab |
|---|---|---|
| Score | 81/100 ✓ | 61/100 |
| Rank in category | #1 of 11 in Fitness Tracker | #12 of 25 in LLM Inference |
| GitHub stars | 17 210 ✓ | 5 199 |
| Stars, last 30 days | +3 041 ✓ | +2 |
| Stable releases, 12 months | 12 ✓ | 9 |
| Latest release | v1.4.3 · 26 Oct 2026 ✓ | v0.40.1 · 19 Jun 2026 |
| Setup | Easy ✓ | Moderate |
| Official Docker image | Yes ✓ | No |
| License | AGPL-3.0 | AGPL-3.0 |
| Main language | JavaScript | Python |

## Which one should you pick?

openGym scores 81/100 against 61/100 for Transformer Lab, so it is the safer default.

openGym ships more often: 12 stable releases in the past year, against 9 for Transformer Lab.

If you want the quickest setup, openGym is easier to run; Transformer Lab needs more configuration.

openGym is growing faster right now (+3 041 stars in 30 days).

## Details

- [openGym](https://selfhost.directory/project/opengym) (markdown: https://selfhost.directory/project/opengym.md)
- [Transformer Lab](https://selfhost.directory/project/transformerlab-app) (markdown: https://selfhost.directory/project/transformerlab-app.md)

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Source: https://selfhost.directory/compare/opengym-vs-transformerlab-app