llm-tracing

OpenLLMetry

OpenLLMetryAIOpen

Open-source OpenTelemetry instrumentation for LLM applications

OpenLLMetry is an open-source observability library that instruments LLM applications with OpenTelemetry traces covering model calls, tool use, and retrieval steps.

Logfire

LogfireAIOpen

AI-native observability from the Pydantic team, joining LLM calls with telemetry

Logfire is Pydantic's AI-native observability platform for debugging AI applications in production, built on OpenTelemetry so one timeline covers agent model calls, tools, services, databases, and hosts.