# Pydantic AI

> Updated 2026-09-03 · type: tool · category: ai-infrastructure · status: active · rev 1

OSS alt to LangGraph; ~19148 stars; via ossinsight.io

- Open source: yes (MIT)
- Self-hostable: yes
- Pricing model: free
- Best for: Python developers building AI agents who want type safety, multi-model compatibility, and production-grade observability.
- Last verified: 2026-09-04

- **Canonical:** https://gtmstacker.com/registry/tool/pydantic-ai/
- **Source:** [github · github.com/pydantic](https://github.com/pydantic/pydantic-ai)
- **Tags:** ai-infrastructure
- **Repository:** https://github.com/pydantic/pydantic-ai

## Is Pydantic AI open source?

Yes — MIT-licensed.

## How much does Pydantic AI cost?

It is free to use.

## Can I self-host Pydantic AI?

Yes — it can be self-hosted.


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OSS alt to LangGraph; ~19148 stars; via ossinsight.io