signoz

SigNoz is an open-source observability platform native to OpenTelemetry with logs, traces and metrics in a single application. An open-source alternative to DataDog, NewRelic, etc.. Open source Application Performance Monitoring (APM) & Observability tool. Maintained by SigNoz on GitHub, where it has earned 29,413 stars from the community.

It's actively developed around apm, application-monitoring, distributed-tracing, and is a solid reference for anyone building with these tools.