L
LangChain
Build context-aware reasoning applications with LLMs
Open SourceFree
Install
pip install langchainAbout
LangChain is the most widely adopted framework for building LLM-powered applications. It provides modular abstractions for chains, agents, memory, retrievers, and tools, enabling developers to compose complex pipelines from reusable components. Available in both Python and JavaScript/TypeScript, LangChain integrates with every major LLM provider, vector store, and data source. Its ecosystem includes LangSmith for observability and LangGraph for stateful, graph-based agent workflows.
Details
| Language | python, typescript, javascript |
| Patterns | chain, agent, rag, memory, tool-use, retrieval |
| Install | pip install langchain |
Tags
llmagentschainsragpythontypescriptorchestration
Quick Info
- Organization
- LangChain AI
- Pricing
- open-source
- Free Tier
- Yes
- Updated
- Apr 1, 2026
131.9K850.0K/wtoday469
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