# LangChain

> Composable framework for building with LLMs, including orchestration for agentic workflows and infrastructure for deploying at scale.

LangChain is a powerful open-source framework designed to simplify the development of applications powered by large language models (LLMs). It provides a complete set of interoperable building blocks for creating context-aware, reasoning applications with vendor optionality. LangChain connects LLMs to company data and APIs, enabling rapid prototyping to production deployment with methods like RAG, agents, and complex orchestration workflows.

## Features
- LangChain Expression Language (LCEL) for composable chains
- Chat models integration with 600+ providers
- Vector stores and embedding models
- Document processing and retrieval systems
- Agent construction and orchestration
- Context and memory management
- Tool and API integration capabilities
- Chain-of-thought implementation
- Multi-step workflow automation
- Retrieval Augmented Generation (RAG)
- Human-in-the-loop support
- Streaming and async operations
- Production-ready deployment tools
- Template library for rapid prototyping

## Integrations
OpenAI, Anthropic, Google (Vertex AI, Gemini), AWS Bedrock, Azure OpenAI, Cohere, Hugging Face, Ollama, Pinecone, Chroma, Weaviate, Qdrant, MongoDB, PostgreSQL, Redis, Elasticsearch, Neo4j, Supabase, LangSmith, LangGraph, Tavily, Apify, Unstructured, LiteLLM, Groq, Mistral AI, Fireworks, Together AI, Databricks

## Platforms
WEB, API, DEVELOPER_SDK

## Pricing
Freemium — Free tier available with paid upgrades

## Links
- Website: https://www.langchain.com
- EveryDev.ai: https://www.everydev.ai/tools/langchain