Mastra vs Pydantic AI
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Mastra if you want typescript framework for building ai agents and workflows (Supervised agent, free); choose Pydantic AI if you want type-safe python framework for building production ai agents (Supervised agent, free).
| Mastra | Pydantic AI | |
|---|---|---|
| What it is | TypeScript framework for building AI agents and workflows | Type-safe Python framework for building production AI agents |
| Type | framework | framework |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | free · Free (open source; pay underlying model usage) | free · Free (open source; pay underlying model usage) |
| Best for | developers | developers |
| Deployment | self-hosted, api | self-hosted, api |
| Modalities | text, code, api | text, code, api |
| Models | model-agnostic | model-agnostic |
| Protocols | mcp, function-calling, rest-api | mcp, function-calling, rest-api |
| Integrations | OpenAI, Anthropic, Google Gemini, Node.js, MCP servers | OpenAI, Anthropic, Google Gemini, Mistral, Amazon Bedrock, Ollama |
| Capabilities | 3 documented | 3 documented |
Mastra
- +TypeScript-first, filling a gap for JS/TS teams in a Python-dominated space
- +Includes agents, workflows, memory, and observability out of the box
- +Apache-2.0 licensed and backed by the experienced Gatsby team
- -TypeScript/JavaScript only
- -A framework, not a product: you build, host, and secure your agents
Pydantic AI
- +Strong type safety and schema-validated outputs from the Pydantic team
- +Built-in reflection and self-correction on invalid output
- +Model-agnostic across most major providers; integrates with Logfire observability
- -Python-only
- -A framework, not a product: you build, host, and secure your agents
Which should you choose?
Mastra is typescript framework for building ai agents and workflows, best for developers. Pydantic AI is type-safe python framework for building production ai agents, best for developers. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.
This comparison is generated from the sourced Mastra and Pydantic AI profiles. Open either profile to review its evidence and last-reviewed date.