kitio.aiPydantic AI vs Mastra
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Pydantic AI is completely free, while Mastra is freemium.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Typed agent outputs
- Function tools
- Multi-provider support
- MCP support
- Logfire tracing
- Agents with tools and memory
- Workflow graphs
- RAG helpers
- Local dev playground
- Evals and tracing
| Feature | Pydantic AI | Mastra |
|---|---|---|
| Best for | Type-safe Python agent framework from the Pydantic team | TypeScript framework for building AI agents and workflows |
| Category | Agents & automation | Agents & automation |
| Pricing model | Free | Freemium |
| Starting price | Free | $250/mo |
| Free plan | Yes, fully free | Yes |
| Made by | Pydantic | Mastra |
| Based in | United Kingdom | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Pydantic AI is completely free, while Mastra is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Starter
Free
- 100K observability events
- 24 CPU hours
- 15-day data retention
- Unlimited users and projects
Teams
$250/mo
- 1M observability events
- 250 CPU hours
- 6-month data retention
- SSO and SOC 2 docs
Enterprise
Custom
- Custom limits and retention
- For teams at scale
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Pydantic AI
- Strong typing reduces bugs
- Familiar to Pydantic users
- Model-agnostic
- Code-only
- Fewer prebuilt integrations than LangChain
Mastra
- Native TypeScript experience
- Good developer playground
- Deploys anywhere
- Not for no-code users
- Younger ecosystem than Python tools
Which one should you choose?
Choose Pydantic AI if you want:
- Strong typing reduces bugs
- Familiar to Pydantic users
- Model-agnostic
Watch out: code-only.
Choose Mastra if you want:
- Native TypeScript experience
- Good developer playground
- Deploys anywhere
Watch out: not for no-code users.
Pydantic AI vs Mastra FAQ
What is the difference between Pydantic AI and Mastra?
Pydantic AI: Type-safe Python agent framework from the Pydantic team. Mastra: TypeScript framework for building AI agents and workflows. Both are agents & automation tools.
Is Pydantic AI or Mastra cheaper?
Pydantic AI is completely free, while Mastra is freemium.
Do Pydantic AI and Mastra have free plans?
Pydantic AI: Yes, fully free. Mastra: Yes.
Who makes Pydantic AI?
Pydantic AI is made by Pydantic, based in United Kingdom.
Who makes Mastra?
Mastra is made by Mastra, based in United States.
Which should I choose, Pydantic AI or Mastra?
Choose Pydantic AI if you value strong typing reduces bugs and familiar to pydantic users. Choose Mastra if you value native typescript experience and good developer playground.