OpenTelemetry is the open-source observability standard under CNCF (Cloud Native Computing Foundation), unifying distributed traces, metrics, and logs data collection. Formed from the merger of OpenTracing and OpenCensus in 2019.
Jaeger is a CNCF graduated open-source distributed tracing system created by Yuri Shkuro at Uber in 2015, supporting end-to-end trace analysis and OpenTelemetry protocol for microservice observability.
Founded in 2020, Highlight is an MIT-licensed open-source full-stack observability platform combining session replay, error tracking, log management, and performance monitoring. With 8,000+ GitHub Stars and self-hosted deployment, it is ideal for frontend and full-stack web teams.