Langfuse (ClickHouse)

Langfuse

Open source LLM engineering platform for tracing, prompt management, datasets, experiments and evaluations.

MITPythonTypeScriptv4.17.0

What it supports

  • Evaluates multi-step agents and tool calls: supportedEvaluates multi-step agents and tool callsDocs
  • LLM as a judge scoring: supportedLLM as a judge scoringDocs
  • Tracing: supportedTracingDocs
  • Runs in CI: supportedRuns in CIDocs

Install

pip install langfuse

Links

Official documentationgithub.com/langfuse/langfuseHosted option: Langfuse CloudPricing

Other eval frameworks

Inspect AIpromptfooDeepEvalPydantic EvalsHarborOpikMLflow GenAI EvaluationArize PhoenixW&B WeaveRagasGoogle ADK EvaluationBraintrustLangSmith EvaluationMicrosoft Foundry EvaluationsGen AI Evaluation Service

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Reviewed Oct 9, 2026.