# openGym vs prom-alertmanager

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

| | openGym | prom-alertmanager |
|---|---|---|
| Score | 81/100 ✓ | 73/100 |
| Rank in category | #1 of 11 in Fitness Tracker | #14 of 104 in Monitoring & observability |
| GitHub stars | 17 158 ✓ | 8 677 |
| Stars, last 30 days | +2 989 ✓ | +50 |
| Stable releases, 12 months | 12 ✓ | 11 |
| Latest release | v1.4.3 · 26 Oct 2026 ✓ | v0.34.1 · 17 Sept 2026 |
| Setup | Easy ✓ | Moderate |
| Official Docker image | Yes | Yes |
| License | AGPL-3.0 | Apache-2.0 |
| Main language | JavaScript | Go |

## Which one should you pick?

openGym scores 81/100 against 73/100 for prom-alertmanager, so it is the safer default.

openGym ships more often: 12 stable releases in the past year, against 11 for prom-alertmanager.

If you want the quickest setup, openGym is easier to run; prom-alertmanager needs more configuration.

openGym is growing faster right now (+2 989 stars in 30 days).

## Details

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

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Source: https://selfhost.directory/compare/opengym-vs-prom-alertmanager