M3 is an open source metrics engine that is used to power monitoring for many global brands. It can ingest, store and index metrics in both StatsD and Prometheus metric formats and has 100% compatibility with PromQL and Graphite.
M3 can serve as Prometheus long term storage and is a great foundational base for those who want to build and manage their own monitoring solution. It is often paired with Prometheus, Grafana and an alerting engine.
We are dedicated to continue making M3 the most powerful metrics engine available and to continue supporting the community behind it.