{"data":{"slug":"alertmanager","name":"Alertmanager","tagline":"Apache-2.0 Prometheus alert routing and silencing","category":"observability","categoryName":"Observability","url":"https://prometheus.io/docs/alerting/latest/alertmanager/","github":"https://github.com/prometheus/alertmanager","pricing":"open-source","hook":"Alertmanager takes alerts from Prometheus and other clients, deduplicates and groups them, and routes them to email, PagerDuty, Opsgenie, Slack or any webhook, with silences and inhibition rules.","whatsGood":"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.","theCatch":"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.","addedAt":"2026-10-18","featured":false,"domain":"Observability","subSpecialty":"Observability","subcategory":"Observability","tags":["self-host","permissive","observability","active"],"capabilities":[],"surfaces":["Self-host"],"ecosystem":["Multi-platform"],"licenseModel":"Apache-2.0","githubStars":8661,"starsPerWeek":13,"access":"free","archived":false,"repo":{"createdAt":"2013-07-16","pushedAt":"2026-10-18","license":"Apache-2.0","archived":false,"checkedAt":"2026-10-19"}},"related":[{"slug":"sentry","name":"Sentry","tagline":"Error tracking that actually helps"},{"slug":"grafana","name":"Grafana","tagline":"Dashboards for everything observable"},{"slug":"prometheus","name":"Prometheus","tagline":"Time-series metrics for cloud-native"},{"slug":"opentelemetry","name":"OpenTelemetry","tagline":"Vendor-neutral observability framework"},{"slug":"datadog","name":"Datadog","tagline":"Unified observability platform"}],"links":{"self":"/api/gems/alertmanager","html":"/gems/alertmanager","markdown":"/gems/alertmanager.md","category":"/api/gems?category=observability","categoryPage":"/stacks/observability"}}