SigNoz
signoz.io
Open-source observability platform — metrics, traces, and logs in one dashboard as a self-hostable alternative to Datadog.
Why it is useful
SigNoz is built on OpenTelemetry, so instrumenting an app once gives you metrics, distributed tracing, and log correlation together instead of stitching together separate tools. Self-hosting avoids Datadog's per-host and data-ingestion pricing, which becomes a major cost driver at scale.