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
- May 26, 2026
137.7K850.0K/wtoday469
Also in Frameworks
A
AutoGen
Microsoft's framework for building multi-agent AI systems
OSSFree
Microsoft
58.4K5w ago445
C
CrewAI
Multi-agent orchestration framework for collaborative AI workflows
OSSFree
CrewAI Inc
52.2Ktoday297
M
Microsoft Agent Framework
Unified multi-agent framework merging AutoGen and Semantic Kernel
OSSFree
Microsoft
58.4K800.0K/w5w ago445