# OSEM vs prometheus

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

| | OSEM | prometheus |
|---|---|---|
| Score | 47/100 | 90/100 ✓ |
| Rank in category | #8 of 11 in Event Management | #1 of 104 in Monitoring & observability |
| GitHub stars | 929 | 66 858 ✓ |
| Stars, last 30 days | +0 | +646 ✓ |
| Stable releases, 12 months | 0 | 16 ✓ |
| Latest release | — | v3.15.1 · 21 Oct 2026 |
| Setup | Advanced | Moderate ✓ |
| Official Docker image | No | Yes ✓ |
| License | MIT | Apache-2.0 |
| Main language | Ruby | Go |

## Which one should you pick?

prometheus scores 90/100 against 47/100 for OSEM, so it is the safer default.

prometheus ships more often: 16 stable releases in the past year, against 0 for OSEM.

If you want the quickest setup, prometheus is easier to run; OSEM needs more configuration.

prometheus is growing faster right now (+646 stars in 30 days).

## Details

- [OSEM](https://selfhost.directory/project/osem) (markdown: https://selfhost.directory/project/osem.md)
- [prometheus](https://selfhost.directory/project/prometheus) (markdown: https://selfhost.directory/project/prometheus.md)

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Source: https://selfhost.directory/compare/osem-vs-prometheus