Pydantic AI — open-source AI Infrastructure

Updated 2026-09-03 · tool · AI Infrastructure · rev 1 · structured JSON

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

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.

• Source: github · github.com/pydantic
• Repository: https://github.com/pydantic/pydantic-ai

See other open-source LangGraph alternatives.

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