Comparison

Mastra vs Pydantic AI

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

Mastra

The TypeScript-first agent framework.

+ Best-in-class DX for TS/JS teams
+ Includes evals and memory out of the box
− Elastic license limits some commercial hosting
− Smaller community than Python options

Pydantic AI

Type-safe agent framework from the Pydantic team.

+ Type-safe structured outputs
+ Clean dependency-injection design
− Newer, fewer integrations than LangChain
− Python only

Spec	Mastra	Pydantic AI
Category	framework	framework
License	Elastic-2.0	MIT
Open source	Yes	Yes
Self-hostable	Yes	Yes
MCP support	Yes	Yes
Pricing	free	free
Starting price	BYOK usage cost	BYOK usage cost
Models	claude, gpt, gemini, byok	claude, gpt, gemini, byok
Languages	typescript	python
GitHub stars	25.4k	18.0k
Last activity	2026-06-25	2026-06-25