{"data":{"slug":"pydantic","name":"Pydantic","tagline":"Data validation using Python type hints","category":"python","categoryName":"Python","url":"https://docs.pydantic.dev","github":"https://github.com/pydantic/pydantic","pricing":"open-source","hook":"Pydantic is Python data validation solved. Just use it.","whatsGood":"V2 Rust core made it dramatically faster. Settings management handles environment variables elegantly. JSON Schema generation enables interop with other tools. The ecosystem integration (FastAPI, LangChain, SQLModel) means Pydantic models flow through your entire stack.","theCatch":"The v1 to v2 migration was painful—significant API changes broke existing code. Some advanced validation patterns require understanding the internals.","verdict":"Python data validation solved. Just use it.","addedAt":"2026-08-18","featured":false,"domain":"Python","subSpecialty":"Data","capabilities":["validation"],"surfaces":["Self-host"],"ecosystem":["Python"],"licenseModel":"OSS/MIT","githubStars":28699},"related":[{"slug":"fastapi","name":"FastAPI","tagline":"Modern Python APIs at startup speed"},{"slug":"uv","name":"uv","tagline":"Python packaging at Rust speed"},{"slug":"ruff","name":"Ruff","tagline":"Python linter faster than your test suite"},{"slug":"polars","name":"Polars","tagline":"DataFrames that respect your CPU"},{"slug":"typer","name":"Typer","tagline":"CLI apps with type hints and zero effort"}],"links":{"self":"/api/gems/pydantic","html":"/gems/pydantic","markdown":"/gems/pydantic.md","category":"/api/gems?category=python","categoryPage":"/stacks/python"}}