Pydantic AI Alternatives
Type-safe Python agent framework with Pydantic validation, tool calling, and dependency injection
Pydantic AI is a Python agent framework from the Pydantic team that brings type-safe, validated interactions to LLM development.
Explore 48 alternatives to Pydantic AI across 2 categories. Updated September 2026.
Featured
Top Pydantic AI alternatives at a glance
- AutoGen. Microsoft's multi-agent framework, in maintenance mode since 2026; Microsoft points new projects to Agent Framework
- CrewAI. Framework for orchestrating role-playing, autonomous AI agents.
- LangGraph. Low-level framework for building stateful, long-running AI agents with graph-based orchestration
- Composio. Tool integration platform connecting AI agents to 1,000+ apps with managed auth and execution
- Smolagents. Lightweight Python agent framework from Hugging Face where agents write Python code instead of JSON tool calls
Compare Pydantic AI with its alternatives
| Product | Pricing Model | Free Tier | Open Source | Hosting | HQ |
|---|---|---|---|---|---|
| Pydantic AI | Free | ✓ | ✓ MIT | Self-hosted | ๐ฌ๐ง United Kingdom |
| AutoGen | Free | ✓ | ✓ | Self-hosted | ๐บ๐ธ United States |
| CrewAI | Freemium | — | ✓ MIT | Cloud + Self-hosted | ๐บ๐ธ United States |
| LangGraph | Free | ✓ | ✓ | Self-hosted | ๐บ๐ธ United States |
| Composio | Freemium | ✓ | ✓ | — | ๐บ๐ธ United States |
| Smolagents | Free | ✓ | ✓ | Self-hosted | ๐บ๐ธ United States |
| OpenAI Agents SDK | Free | ✓ | ✓ | Self-hosted | ๐บ๐ธ United States |
| Mastra | Freemium | ✓ | ✓ | Cloud + Self-hosted | ๐บ๐ธ United States |
| Letta | Freemium | ✓ | ✓ | Cloud + Self-hosted | ๐บ๐ธ United States |
| Google ADK | Free | ✓ | ✓ | Cloud + Self-hosted | ๐บ๐ธ United States |
| AgentOps | Freemium | ✓ | — | Cloud + Self-hosted | ๐บ๐ธ United States |
| AG2 | Free | ✓ | ✓ | Self-hosted | — |
| AgentsKit | Free | ✓ | ✓ MIT | Self-hosted | ๐บ๐ธ United States |
| Burr | Free | ✓ | ✓ | Self-hosted | ๐บ๐ธ United States |
| Microsoft Agent Framework | Free | ✓ | ✓ | Cloud + Self-hosted | ๐บ๐ธ United States |
| Tura | — | ✓ | ✓ AGPL3 | — | — |
๐ต๏ธโโ๏ธ Agents
Mastra
TypeScript-first AI framework for building agents, RAG pipelines, and workflows
Letta
Framework for building stateful AI agents with persistent memory, formerly MemGPT
Google ADK
Open-source agent development kit from Google for building multi-agent systems
AG2
Community-driven multi-agent framework forked from AutoGen with backward-compatible API
Burr
Build stateful AI agents and applications as state machines, with a built-in tracing UI
Tura
Open-source local coding agent that turns intent into verified repository changes
Fixie
The fastest way to build conversational AI agents
Superagent
Prototype and deploy agents powered by large language models.
Dust
The operating system for AI agents
๐๏ธ Frameworks & Stacks
Mastra
TypeScript-first AI framework for building agents, RAG pipelines, and workflows
Google ADK
Open-source agent development kit from Google for building multi-agent systems
Burr
Build stateful AI agents and applications as state machines, with a built-in tracing UI
LangChain
LangChain gives developers a framework to construct LLMโpowered apps easily.
llmkit
One LLM client API for 20+ providers, in Go, TypeScript, Python and Rust
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