LangChain
Open-source LLM application framework with chains, agents, and tool-calling orchestration.
Products
LangChain Framework
Python and JS libraries for building chains, agents, and RAG pipelines with any LLM provider.
LangGraph
Graph-based agent orchestration for multi-step workflows with conditional branching and parallel execution.
LangSmith
Observability and evaluation platform for tracing, testing, and monitoring LLM applications in production.
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