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LangGraph

MIT-licensed Python library for stateful agent workflows

90.5
Score in best AI agent frameworks and tooling
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Ranked 2 of 12 in best AI agent frameworks and tooling

MIT-licensed graph runtime for agents, with durable state and human pauses, from the LangChain team. It sits under LangChain here as the lower-level layer, and LangSmith hosting is a separate paid service.

Best for Stateful agents that need explicit control of each step

About LangGraph

LangGraph models an agent as a graph. Nodes run model calls or tools, edges decide the next step, and state is kept between steps. The project describes durable execution, memory, streaming and human-in-the-loop pauses, and it is installed as a Python package with pip. Its repository is MIT licensed.

The library sits under LangChain's higher-level agent tools and suits teams that need explicit control over each step. The LangGraph FAQ says it is free to use. The paid part of the ecosystem is LangSmith, which covers observability, evaluation and deployment. Deep Agents, a higher-level package built on LangGraph, is an option for teams that want less setup.

Key features

  • Durable execution
  • Memory and streaming
  • Human-in-the-loop
  • Python package
  • Deep Agents package on top

Strengths

  • MIT-licensed library with durable execution
  • Explicit state graphs for controlling each step
  • Human-in-the-loop pauses built in

Limits

  • Lower-level than most frameworks, so simple agents need more code
  • Tracing and deployment need the paid LangSmith service

Where LangGraph ranks

How LangGraph compares

ProductScorePricePlatformsLanguageAgent approachPaid hosted service
#1LangChain92.0Free and open sourceSelf-hostedPython and TypeScriptGraph workflows with LangGraphLangSmith paid plans
#2LangGraph90.5Free and open sourceSelf-hostedPythonGraph of steps with stateLangSmith paid plans
#3LlamaIndex88.0Free and open sourceSelf-hostedNot listedDocument-centric agentsLlamaParse, separate
#4Pydantic AI86.5Free and open sourceWindowsmacOSLinuxPythonTyped agents and structured outputsLogfire, free tier
#5Agent Development Kit (ADK)85.5Free and open sourceCommand lineWindowsmacOSLinuxPython, TypeScript, Go and JavaCode-first agents with a web interfaceAgent Runtime on Google Cloud

The full comparison table for best AI agent frameworks and tooling has all 12 products.

Alternatives to LangGraph

All 11 alternatives

Compare LangGraph

Questions about LangGraph

Is LangGraph free?
LangGraph can be used without paying: MIT-licensed library is free; LangSmith hosting is a separate paid service. Check the vendor’s pricing page for current limits.
Is LangGraph open source?
Yes. LangGraph publishes its source code under the MIT license.
Which platforms does LangGraph support?
LangGraph is available on: Self-hosted.
What is LangGraph best for?
Stateful agents that need explicit control of each step. In our ranking of AI agent frameworks and tooling it is number 2 of 12 with a score of 90.5.
What are the best alternatives to LangGraph?
The highest-ranked alternatives on listme.name are LangChain, LlamaIndex, Pydantic AI, Agent Development Kit (ADK).

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Ranked #2 of 12 AI agent frameworks and tooling on listme.name
<a href="https://listme.name/software/langgraph"><img src="https://listme.name/badge/langgraph.svg" height="28" alt="Ranked #2 of 12 AI agent frameworks and tooling on listme.name"></a>