Alertmanager vs Prometheus
| Tagline | Handle Prometheus alerts with deduplication, grouping, silencing, and routing | Industry-standard metrics monitoring and alerting toolkit with PromQL |
| Category | Monitoring & Status Pages | Monitoring & Status Pages |
| Replaces | Datadog, Pingdom | Datadog |
| GitHub stars | 6.6k | 65k |
| Language | Go | Go |
| License | Apache-2.0 | Apache-2.0 |
| Self-host difficulty | 2/5 Easy | 4/5 Involved |
| Deploy options | Docker Docker Compose Kubernetes Manual | Docker Docker Compose Kubernetes Manual |
| Managed hosting | ||
| Last updated | 1 month ago | 5 days ago |
| View repo | View repo |
Where each falls short
The honest trade-offs — what you give up with each, versus the proprietary tools they replace.
Alertmanager
- No built-in dashboard; must pair with Grafana or a similar UI
- Configuration is file-based YAML with no graphical editor
- High-availability clustering requires careful setup
Prometheus
- No built-in dashboards UI; you must pair it with Grafana
- Long-term storage and horizontal scale need add-ons (Thanos, Cortex, Mimir)
- No logs, traces, or APM out of the box (metrics only)
- Steeper operational learning curve than turnkey Datadog
Bottom line
Choose Alertmanager if you want the lower-effort setup; choose Prometheus for the larger community and ecosystem. Prometheus has seen more recent development. Open each guide below for deploy steps and the full feature gap.
Alertmanager
Handle Prometheus alerts with deduplication, grouping, silencing, and routing