LangGraph
Open-source framework for stateful, multi-step agents, with LangSmith for tracing and deployment.
Free plan, paid from $39/seat/moEngineers building custom agents in Python or JS
Framework is MIT open source. LangSmith Developer is free (1 seat); Plus $39 per seat/month. Checked 2026-10-14.
Quick start
Install langgraph, build a two-node graph with one tool, and add tracing before adding more steps.
Good and not so good
- Fine control over agent state
- Large community
- Steeper learning curve
Use cases with LangGraph
No use cases yet. Add an agent use case.