Open-source alternatives to LangSmith

Open-source LLM observability, evaluation, and tracing. — Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.

↔ alternative to LangSmith

OpenTelemetry LLM observability platform — OpenLIT is the open-source agent harness engineering platform: trace, evaluate, guard, and improve everything around the model in your AI agents, on OTEL.

↔ alternative to LangSmith、Datadog