OpenTelemetry (OTEL) has evolved to cover all of observability, providing a stable standard and SDKs for metrics, logs, and traces.
OTEL is now the second most active project in the CNCF, showing widespread adoption among observability providers.
Key sub-projects of OTEL include specifications, implementations, the OpenTelemetry Protocol, the OpenTelemetry Collector, and the Open Agent Management Protocol.