These tools competes with

LangfusevsLangWatch

OSS LLM engineering platform (acquired by ClickHouse, Jan 2026) versus LLM observability and evaluation with OpenTelemetry support

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Choose Langfuse when…

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

Choose LangWatch when…

  • •You want OpenTelemetry-native LLM tracing without vendor lock-in
  • •You need combined tracing and automated evaluation in one platform
  • •You prefer self-hosting your observability stack

Side-by-side comparison

Field
Langfuse
LangWatch
Category
Observability
Observability
Type
Open Source
Open Source
Free Tier
✓ Yes
✓ Yes
Pricing Plans
Cloud: $59/mo
Cloud: $99/mo
GitHub Stars
⭐ 7,000
⭐ 2,000
Health
●95 — Active
●70 — Active

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 ↗

LangWatch

Open-source LLM observability and evaluation platform with OpenTelemetry-native tracing. Provides trace visualization, automated LLM-as-judge evaluations, dataset management, and prompt versioning. Self-hostable with a managed cloud option.

Website ↗GitHub ↗

Shared Connections2 tools both integrate with

LangChainArize Phoenix

Only Langfuse (29)

Claude CodeCrewAICursorLangGraphOpenHandsAutoGenLlamaIndexDifyMastraAgno

Only LangWatch (1)

Langfuse

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

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