These tools integrates with

LangChainvsLangWatch

The leading LLM app framework versus LLM observability and evaluation with OpenTelemetry support

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Choose LangChain when…

  • •You want a broad, flexible LLM orchestration toolkit
  • •You need integrations with many tools and data sources
  • •You're prototyping or exploring LLM app patterns

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
LangChain
LangWatch
Category
Pipelines & RAG
Observability
Type
Open Source
Open Source
Free Tier
✓ Yes
✓ Yes
Pricing Plans
—
Cloud: $99/mo
GitHub Stars
⭐ 93,000
⭐ 2,000
Health
●100 — Active
●70 — Active

LangChain

Most widely used framework for building LLM applications. Chains, agents, RAG pipelines, and deep integrations with 300+ tools.

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 Connections1 tools both integrate with

Langfuse

Only LangChain (32)

OpenHandsCrewAIAutoGenSemantic KernelLangSmithLlamaIndexQdrantChromaPineconeWeaviate

Only LangWatch (2)

Arize PhoenixLangChain

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

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