Grafana Mimir
AGPL-3.0 scalable long-term Prometheus storage
Observability / Observability · AGPL-3.0 · 5.3k
Reviewed 2026-10-18 · last push 2026-10-19 · repo checked 2026-10-19
What's Good
AGPL-3.0 (grafana/mimir), release mimir-3.2.2 (2026-10-07). Run it as one binary in monolithic mode or as microservices; Grafana's internal testing reports up to 1 billion active series. It ships best-practice dashboards, alerts and runbooks, supports multi-tenancy, stores blocks in object storage and has a parallelised query engine. Fully PromQL compatible. ★~5.3k.
The Catch
A scaled Mimir is many components to operate, and object storage plus compactor tuning are real work. If you are below tens of millions of series, a single VictoriaMetrics or Prometheus with remote storage is simpler. AGPL-3.0 if you offer a modified version as a service.
Verdict
The Prometheus backend for when one Prometheus is not enough.
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