kitio.aiPydantic AI vs Agent Development Kit
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Pydantic AI starts at Free and Agent Development Kit starts at Free. Check both pricing pages for current plans.
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
- Multi-agent composition
- Workflow agents
- Local dev UI
- Built-in evaluation
- Multi-language SDKs
| Feature | Pydantic AI | Agent Development Kit |
|---|---|---|
| Best for | Type-safe Python agent framework from the Pydantic team | Google's open-source toolkit for building and deploying agents |
| Category | Agents & automation | Agents & automation |
| Pricing model | Free | Free |
| Starting price | Free | Free |
| Free plan | Yes, fully free | Yes, fully free |
| Made by | Pydantic | |
| Based in | United Kingdom | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Pydantic AI starts at Free and Agent Development Kit starts at Free. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
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
Agent Development Kit
- Backed by Google
- Several programming languages
- Easy path to Google Cloud
- Best experience is on Google Cloud
- Code-first only
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 Agent Development Kit if you want:
- Backed by Google
- Several programming languages
- Easy path to Google Cloud
Watch out: best experience is on google cloud.
Pydantic AI vs Agent Development Kit FAQ
What is the difference between Pydantic AI and Agent Development Kit?
Pydantic AI: Type-safe Python agent framework from the Pydantic team. Agent Development Kit: Google's open-source toolkit for building and deploying agents. Both are agents & automation tools.
Is Pydantic AI or Agent Development Kit cheaper?
Pydantic AI starts at Free and Agent Development Kit starts at Free. Check both pricing pages for current plans.
Do Pydantic AI and Agent Development Kit have free plans?
Pydantic AI: Yes, fully free. Agent Development Kit: Yes, fully free.
Who makes Pydantic AI?
Pydantic AI is made by Pydantic, based in United Kingdom.
Who makes Agent Development Kit?
Agent Development Kit is made by Google, based in United States.
Which should I choose, Pydantic AI or Agent Development Kit?
Choose Pydantic AI if you value strong typing reduces bugs and familiar to pydantic users. Choose Agent Development Kit if you value backed by google and several programming languages.