LangChain's framework for controllable agent workflows with durable execution, memory and human-in-the-loop.
WebsiteProvisional comparison
LangGraph vs Pydantic AI
LangGraph is provisional S-tier and Pydantic AI is provisional A-tier on Agent Frameworks & SDKs. Rankings are never for sale.
Full Agent Frameworks & SDKs tier list
Type-safe Python agent framework from the Pydantic team.
Website| Field | LangGraph | Pydantic AI |
|---|---|---|
| Tier | S · provisional | A · provisional |
| Why | De facto standard for stateful agent graphs (43k+ stars) with a large ecosystem. | Well-typed, production-oriented Python framework (20k+ stars). |
| Pricing | open-source | open-source |
| GitHub stars | 43,321 | 20,644 |
| Last push | Oct 15, 2026 | Oct 15, 2026 |
| Last verified | Oct 15, 2026 | Oct 15, 2026 |