OpenTelemetry is an open-source project within the Cloud Native Computing Foundation (CNCF) that aims to provide a unified set of APIs, libraries, agents, and instrumentation for telemetry data.
CNCF graduated OpenTelemetry on May 21, 2026. Microsoft added OpenTelemetry to recent .NET, VS Code and Azure tooling. AWS, Google Cloud, Datadog and Grafana document OpenTelemetry support.