LangGraph is a library from the LangChain team for building agents as graphs. Each step is a node, and you control exactly how the agent moves between them, including loops, branches and points where a human must approve before it continues.
It keeps track of state and can save progress, which helps with long-running or interrupted tasks. The trade-off is more concepts to learn than simpler frameworks, so it suits developers who need reliable, predictable agent behaviour.
- Category
- AI Agents
- Made by
- LangChain
- Best for
- Developers who need precise control over agent flow and state
Key features
- Stateful graphs
- Human in the loop
- Persistence
Pros
- Fine control over agent flow
- Built-in state and saved progress
- Supports human approval steps
Cons
- More concepts and code than simpler frameworks
- Steeper learning curve
Pricing
Frequently asked questions
Is LangGraph open source?
Yes, the library is open source. LangChain also offers paid hosted services around it.
Do I need LangChain to use LangGraph?
LangGraph can be used on its own, although it works well alongside LangChain tools.
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