Tool
LangGraph
LangChain durable graph runtime for stateful agents with MCP adapters
Why notable
Standard for checkpointed agent workflows + tool graphs
- Pricing
- Open Source
- Pricing detail
- MIT OSS + LangSmith paid platform
- Platforms
- Python + JS
- Best for
- stateful agent graphs
- Source
- LangChain, MCP.Directory 2026
- Confidence
- High