Both are open source framework options with comparable terms, so the choice comes down to which model of the problem you prefer — compare the descriptions below rather than the licence.
Type-safe Python agents with structured output that actually validates.
Programs, not prompts — compile and optimise the prompt against a metric.
| Pydantic AI | DSPy | |
|---|---|---|
| Licence | Open source | Open source |
| Pricing | open source | open source |
| Self-hostable | Yes | Yes |
| Languages | Python | Python |
| Install | pip install pydantic-ai | pip install dspy |
| Keys required | None | None |
Both are open source framework options with comparable terms, so the choice comes down to which model of the problem you prefer — compare the descriptions below rather than the licence. Pydantic AI: Type-safe Python agents with structured output that actually validates. DSPy: Programs, not prompts — compile and optimise the prompt against a metric.
Pydantic AI can run on your own infrastructure. DSPy can run on your own infrastructure.
Pydantic AI is open source (open source). DSPy is open source (open source).
Every page here answers to Accept: text/markdown and returns the same content at roughly a tenth the tokens. No separate site, no toggle — same URL.
curl -s -H "Accept: text/markdown" https://newagent.build/compare/pydantic-ai-vs-dspy