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Top 23 Python Pydantic Projects
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The most sophisticated approach uses type hints and models to automatically generate documentation. FastAPI is the poster child here - it introspects your Pydantic models and function signatures to build comprehensive OpenAPI specs with minimal manual input.
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an SQLModel entity backed by a database table doesn't validate its fields on creation, which is the point of Pydantic.
https://github.com/fastapi/sqlmodel/issues/52#issuecomment-1...
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Project mention: Building Your Own CLI Coding Agent with Pydantic-AI | news.ycombinator.com | 2025-08-28
I've been building an integration [1] with Pydantic AI and the experience has been great. Questions usually get answered within a few hours, and the team is super responsive and supportive for external contributors. The public API is easy to extend for new functionality (in my case, durable agents).
Its agent model feels similar to OpenAI's: flexible and dynamic without needing to predefine a DAG. Execution is automatically traced and can be exported to Logfire, which makes observability pretty smooth too. Looking forward to their upcoming V1 release.
Shameless plug: I've been working on a DBOS [2] integration into Pydantic-AI as a lightweight durable agent solution.
[1] https://github.com/pydantic/pydantic-ai/pull/2638
[2] https://github.com/dbos-inc/dbos-transact-py
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If you're looking for a mixture of the two, there's Django Ninja: https://django-ninja.dev
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litestar
Production-ready, Light, Flexible and Extensible ASGI API framework | Effortlessly Build Performant APIs
Project mention: Best Backend Frameworks for 2025: A Developer's Guide to Making the Right Choice | dev.to | 2025-02-02Litestar: The New Python Performance King
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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datamodel-code-generator
Pydantic model and dataclasses.dataclass generator for easy conversion of JSON, OpenAPI, JSON Schema, and YAML data sources.
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tracecat
All-in-one automation platform (workflows, tables, cases) for security and IT teams. Open source Splunk SOAR / ServiceNow SecOps alternative.
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opyrator
🪄 Turns your machine learning code into microservices with web API, interactive GUI, and more.
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uvicorn-gunicorn-fastapi-docker
Docker image with Uvicorn managed by Gunicorn for high-performance FastAPI web applications in Python with performance auto-tuning.
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#!/usr/bin/env -S uv run --script # /// script # requires-python = ">=3.10" # dependencies = [ # "fire", # "magentic", # "pydantic", # ] # /// from fire import Fire from magentic import chatprompt, AssistantMessage, SystemMessage, UserMessage from pydantic import BaseModel # this is a modified version of magentic's example chatprompt code # https://magentic.dev/#chatprompt class Quote(BaseModel): quote: str character: str @chatprompt( SystemMessage("You are a movie buff."), UserMessage("What is your favorite quote from Harry Potter?"), AssistantMessage( Quote( quote="It does not do to dwell on dreams and forget to live.", character="Albus Dumbledore", ) ), UserMessage("What is your favorite quote from {movie}?"), ) def get_movie_quote(movie: str) -> Quote: ... if __name__=="__main__": Fire(get_movie_quote)
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fastcrud
FastCRUD is a Python package for FastAPI, offering robust async CRUD operations and flexible endpoint creation utilities.
fastcrud - CRUD operations for FastAPI
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Python Pydantic discussion
Python Pydantic related posts
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Building Your Own CLI Coding Agent with Pydantic-AI
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Curiosity and Craft: What Drives Me to Build
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Building MIA: A WhatsApp AI Assistant to Escape Subscription Hell
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Framefox-Python web framework-FastAPI+MVC+SQLModel+Interactive CLI
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Loading Pydantic models from JSON without running out of memory
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New tools and features in the Responses API
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🥔 Reputato: Not Every Company Is Golden. We Sniff Out the Ones That Are.
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A note from our sponsor - SaaSHub
www.saashub.com | 1 Sep 2025
Index
What are some of the best open-source Pydantic projects in Python? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | fastapi | 88,998 |
| 2 | pydantic | 24,969 |
| 3 | sqlmodel | 16,663 |
| 4 | pydantic-ai | 12,048 |
| 5 | FastUI | 8,859 |
| 6 | django-ninja | 8,462 |
| 7 | litestar | 7,360 |
| 8 | logfire | 3,494 |
| 9 | datamodel-code-generator | 3,419 |
| 10 | rocketry | 3,355 |
| 11 | vizro | 3,297 |
| 12 | tracecat | 3,205 |
| 13 | opyrator | 3,130 |
| 14 | docarray | 3,098 |
| 15 | uvicorn-gunicorn-fastapi-docker | 2,796 |
| 16 | beanie | 2,418 |
| 17 | magentic | 2,362 |
| 18 | ormar | 1,766 |
| 19 | pydantic-core | 1,661 |
| 20 | polyfactory | 1,283 |
| 21 | redis-om-python | 1,245 |
| 22 | fastcrud | 1,230 |
| 23 | odmantic | 1,127 |
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