VictoriaMetrics

A time series database built around Prometheus metrics, VictoriaMetrics stores and queries samples with a small memory and CPU footprint. It exposes a Prometheus compatible API, accepts remote write data, and the family of components includes vmagent, vmalert and vmgrafana so collection, alerting and graphing can live in one deployment.

Operators pick it when they want a lean Prometheus alternative that handles many series on modest hardware, and it also works as long term storage behind Thanos.

Self-hosting keeps metric history on your own disks, without per-series or per-user fees, and lets you back it up alongside your other data.