These tools integrates with

DeepEvalvsLangfuse

LLM evaluation framework — 14+ metrics versus OSS LLM engineering platform (acquired by ClickHouse, Jan 2026)

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Choose DeepEval when…

  • •You want a pytest-style framework for LLM testing
  • •Unit-test-like evals for LLM outputs fit your workflow
  • •You need RAG-specific metrics like faithfulness and relevancy

Choose Langfuse when…

  • •You want open-source LLM observability
  • •Self-hosting your tracing stack is important
  • •You need cost tracking across models and users

Side-by-side comparison

Field
DeepEval
Langfuse
Category
Prompt & Eval
Observability
Type
Open Source
Open Source
Free Tier
✓ Yes
✓ Yes
Pricing Plans
—
Cloud: $59/mo
GitHub Stars
⭐ 5,500
⭐ 7,000
Health
●95 — Active
●95 — Active

DeepEval

Open-source evaluation framework with 14+ metrics including faithfulness, relevancy, and hallucination detection. Integrates with CI/CD.

Website ↗GitHub ↗

Langfuse

Open-source platform for tracing, evaluations, and prompt management. Self-hostable alternative to LangSmith with broad framework support. Acquired by ClickHouse in January 2026; OSS core continues with deeper ClickHouse-backed analytics.

Website ↗GitHub ↗

Shared Connections3 tools both integrate with

RAGASPromptFooOpenAI API

Only DeepEval (4)

LangfuseTruLensInspectGalileo

Only Langfuse (28)

Claude CodeCrewAICursorLangGraphLangChainOpenHandsAutoGenLlamaIndexDifyMastra

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See how DeepEval and Langfuse fit into the bigger picture — 235 tools, 543 relationships, all mapped.

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