Alertmanager
Apache-2.0 Prometheus alert routing and silencing
Observability / Observability · Apache-2.0 · 8.7k
Reviewed 2026-10-18 · last push 2026-10-18 · repo checked 2026-10-19
What's Good
Apache-2.0 (prometheus/alertmanager), release v0.34.1 (2026-09-17), part of the Prometheus project. Routing trees decide who gets what. Grouping turns alert storms into single notifications. It can run clustered for high availability. Precompiled binaries and Docker images. ★~8.7k.
The Catch
All configuration is YAML, and routing trees get hard to reason about at scale. There is no on-call scheduling or escalation; pair it with an incident tool for that. The UI is basic.
Verdict
The standard alert router for any Prometheus setup.
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