Python agent framework from the Pydantic team.
Agent frameworks & SDKsopen-source
Pydantic AI vs Mastra
Verdict: in our “Best framework for your first agent” ranking, Pydantic AI ranks #3 and Mastra ranks #4. The table compares their verified basics; how we rank.
| Feature | Pydantic AI | Mastra |
|---|---|---|
| What it is | Python agent framework from the Pydantic team. | TypeScript framework for AI agents and workflows. |
| Category | Agent frameworks & SDKs | Agent frameworks & SDKs |
| Pricing model | open-source | open-source |
| Integrations | API, MCP | API, MCP |
| Self-hostable | Yes | Yes |
| Open-source repo | pydantic/pydantic-ai | mastra-ai/mastra |
| Rank in “Best framework for your first agent” | #3 | #4 |
| StackRank score | Not yet benchmarked | Not yet benchmarked |
| Last verified | Oct 14, 2026 | Oct 14, 2026 |
Try them
TypeScript framework for AI agents and workflows.
Agent frameworks & SDKsopen-source