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LangChain ✓ Verified
Framework for building LLM-powered applications — chains, agents, and RAG pipelines
About LangChain
LangChain is the most popular open source framework for building applications powered by large language models. It provides tools for prompt chaining, RAG (retrieval-augmented generation), agent creation, memory management, and integration with data sources — making it the backbone of most enterprise AI applications.
Key Features
✓ LLM chain orchestration and prompt management
✓ RAG — connect LLMs to your own data sources
✓ Agent framework with tool use and decision making
✓ Memory systems for conversational AI
✓ Document loaders for 50+ data formats
✓ Vector store integration (Pinecone, Weaviate, etc.)
✓ LangSmith for debugging, testing, and monitoring
✓ LangServe for deploying chains as APIs
✓ Supports OpenAI, Anthropic, Google, local models
✓ 100K+ GitHub stars — largest LLM framework community
Who Is It For?
Developers and ML engineers building production AI applications with LLMs.