The original, broad LLM framework with integrations to nearly every model and tool.
Category: Agent Frameworks · Type: LLM application framework · Website: https://www.langchain.com
Overview
LangChain is a comprehensive framework of components — model wrappers, prompt templates, retrievers, tools, and chains — for building LLM applications. Its huge integration library makes it a common glue layer, with LangGraph handling complex agent orchestration on top.
Key Features
- Massive library of model, vector store, and tool integrations
- Composable chains, retrievers, and prompt utilities
- Foundation for retrieval-augmented generation (RAG)
- Pairs with LangGraph and LangSmith
Role in the Agentic AI Stack
A broad integration and RAG toolkit; the component library beneath much of the agent ecosystem.
Part of Agentic AI Landscape → Agent Frameworks