LangChain docs home
The platform for reliable agents
Frameworks
LangChain - Python
Open-source framework for developing applications powered by large language models (LLMs).
LangChain - JavaScript
Open-source framework for developing applications powered by large language models (LLMs).
LangGraph - Python
Low-level orchestration framework for building, managing, and deploying long-running, stateful agents.
LangGraph - JavaScript
Low-level orchestration framework for building, managing, and deploying long-running, stateful agents.
Platforms
LangGraph Platform - Python
Commercial platform for developing, deploying, and scaling long-running agents and worflows.
LangGraph Platform - JavaScript
Commercial platform for developing, deploying, and scaling long-running agents and workflows.
LangSmith
Observability and evals platform for debugging, testing, and monitoring any AI application.