Alternatives · AI Agents
Pydantic AI alternatives
As of Nov 13, 2026, the highest-graded Pydantic AI alternative is Mastra (2.8 GPA). It's also the best free one.
Pydantic AI compared with 5 alternatives: LangGraph, Mastra, Agno, CrewAI and LlamaIndex.
Pydantic AI is free to use. All 5 alternatives are free or have a free plan.
Listings checked up to Nov 13, 2026 · Where the facts come from
At a glance
| Tool | Price | Free plan | Runs on |
|---|---|---|---|
| Pydantic AIThis tool | Free | Free | Web |
| LangGraph | Free plan · from $39/mo | Yes | Web |
| Mastra | Free plan · from $25/mo | Yes | Web |
| Agno | Free plan · from $150/mo | Yes | Web |
| CrewAI | Free plan | Yes | Web |
| LlamaIndex | Free plan · from $500/mo | Yes | Web |
Price against what you get
Pydantic AI has no paid plan and scores 2.3 out of 4 on features, ease of use and platforms. None of the 4 alternatives on this chart both scores higher and starts lower.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
How each one differs from Pydantic AI
LangGraph
Open-source framework for building controllable AI agents
- LangGraph starts at $39 per seat / month, billed monthly.
- LangGraph also covers workflow automation.
Suits: Developers who want fine-grained control over agent logic
Mastra
TypeScript framework for building and running AI agents
- Mastra starts at $25 per workspace / month.
- Mastra also covers workflow automation.
Suits: TypeScript teams building agents inside Next.js, React or Node apps
Agno
Open-source agent runtime with a hosted control plane
- Agno starts at $150 per month for the Pro control plane.
Suits: Engineering teams that want agents running inside their own cloud
CrewAI
Multi-agent platform to build, run and govern AI agents
- CrewAI also covers workflow automation and no-code.
Suits: Developers who want a free multi-agent framework with a hosted option
LlamaIndex
Document parsing and extraction platform for AI agents
- LlamaIndex starts at $500 per month (Pro), after pay-as-you-go from $0.
- LlamaIndex also covers workflow automation.
Suits: Developers feeding complex documents into RAG or agent pipelines
Limits worth knowing in Pydantic AI
- It is a code library for Python; there is no hosted builder or visual editor.
- Observability through Logfire is a separate product: the free Personal plan covers 10M records a month, with Team at $49 and Growth at $249 a month.
- The AI Gateway charges a markup on built-in providers (5% on Personal and Team, 3% on Growth) unless you bring your own keys.
- Model usage is billed by whichever provider you connect.
Common questions
What are the alternatives to Pydantic AI?
The alternatives to Pydantic AI in this directory are LangGraph, Mastra, Agno, CrewAI and LlamaIndex. Each one has a side-by-side comparison with Pydantic AI.
Is there a free alternative to Pydantic AI?
Yes. LangGraph, Mastra, Agno, CrewAI and LlamaIndex have a free plan alongside paid ones.
When were these prices checked?
Each listing shows its own date. On this page they run from Nov 12, 2026 to Nov 13, 2026. Vendors change prices without notice, so confirm on their site before you buy.