Which is more popular, Mastra or Pydantic AI?

Mastra has more GitHub stars (28,498 vs 20,354).

Which is more actively developed, Mastra or Pydantic AI?

Mastra had more commits in the last 90 days (4,044 vs 1,409).

Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.

Side-by-side comparison of two AI agent tools

Pick Mastra for: from the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents. Pick Pydantic AI for: aI Agent Framework, the Pydantic way.

From GitHub data refreshed daily.

From the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.

AI Agent Framework, the Pydantic way

+Model-agnostic support for virtually every major LLM provider and cloud platform, offering flexibility in model selection
+Built by the Pydantic team with deep integration of proven validation technology used by OpenAI SDK, Google ADK, Anthropic SDK, and other major AI libraries
+FastAPI-like developer experience with type hints and validation, providing familiar ergonomics for Python developers

-Python-only framework, limiting adoption for teams using other programming languages
-Relatively new framework compared to established alternatives like LangChain or LlamaIndex
-May have a steeper learning curve for developers unfamiliar with Pydantic's validation concepts

•Building production-grade AI agents that need to integrate with multiple LLM providers for redundancy and cost optimization
•Developing type-safe AI workflows where data validation and schema enforcement are critical for reliability
•Creating AI applications that require seamless switching between different models and providers based on performance or cost requirements

Which is more popular, Mastra or Pydantic AI?: Mastra has more GitHub stars (28,498 vs 20,354).
Which is more actively developed, Mastra or Pydantic AI?: Mastra had more commits in the last 90 days (4,044 vs 1,409).
Should I use Mastra or Pydantic AI?: Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.