# prom-alertmanager vs Semaphore UI

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

| | prom-alertmanager | Semaphore UI |
|---|---|---|
| Score | 73/100 | 73/100 |
| Rank in category | #14 of 104 in Monitoring & observability | #12 of 166 in Developer Tools |
| GitHub stars | 8 675 | 14 336 ✓ |
| Stars, last 30 days | +48 | +153 ✓ |
| Stable releases, 12 months | 11 | 20 ✓ |
| Latest release | v0.34.1 · 17 Sept 2026 | v2.18.31 · 7 Oct 2026 ✓ |
| Setup | Moderate | Easy ✓ |
| Official Docker image | Yes | Yes |
| License | Apache-2.0 | MIT |
| Main language | Go | Go |

## Which one should you pick?

prom-alertmanager and Semaphore UI score the same (73/100), so the choice comes down to the details below.

Semaphore UI ships more often: 20 stable releases in the past year, against 11 for prom-alertmanager.

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

Semaphore UI is growing faster right now (+153 stars in 30 days).

## Details

- [prom-alertmanager](https://selfhost.directory/project/prom-alertmanager) (markdown: https://selfhost.directory/project/prom-alertmanager.md)
- [Semaphore UI](https://selfhost.directory/project/semaphore-ui) (markdown: https://selfhost.directory/project/semaphore-ui.md)

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