Dev platform
LangChain
An open-source framework for building LLM apps, connecting models, tools and data.
Last updated by editors:
Pros
Huge ecosystem
Rich integrations
Active community
LangSmith observability
Cons
Heavy abstractions
Fast-changing versions
Developer-oriented
Key features
ChainingTool callingLangGraphLangSmith
Best for
LLM app developmentAgentsRAGPrototypes
FAQ
What is LangChain?
An open-source framework for building LLM apps, connecting models, tools and data.
What are the pros and cons of LangChain?
Pros: Huge ecosystem, Rich integrations, Active community, LangSmith observability. Cons: Heavy abstractions, Fast-changing versions, Developer-oriented.
How much does LangChain cost?
Open source: Free; LangSmith: from $39/user/mo.
Who is LangChain for?
Best for LLM app development, Agents, RAG, Prototypes.
What are the alternatives to LangChain?
Consider LlamaIndex, Dify, CrewAI.
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Pricing
Open sourceFree
- • Framework
- • LangGraph
LangSmithfrom $39/user/mo
- • Observability
- • Evals
Rating
4.4
(14,000 reviews)