Who uses it

Open source repos that use Pydantic

12 public repos that SeeRepo read use Pydantic. It's used most with langsmith, Rich, and React.

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Used most with

Pydantic12 repos
  • langsmith3 repos
  • Rich3 repos
  • React2 repos
  • FastAPI2 repos
  • Flask2 repos
  • pyarrow2 repos
  • Redis2 repos
  • uvicorn2 repos

The repos, by stars

  1. 1.
    Significant-Gravitas/AutoGPT

    AutoGPT is the vision of accessible AI for everyone, to use and to build on. Our mission is to provide the tools, so that you can focus on what matters.

    Python+124187.9kAI 16.8%What it’s built withThe AI
  2. 2.
    langgenius/dify

    Build Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace. Deploy on cloud, VPC, or self-hosted, so teams move from prototype to production without rebuilding the stack.

    Python+51160.4kAI 5.1%What it’s built withThe AI
  3. 3.
    open-webui/open-webui

    User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

    Svelte+66157.7kAI 1.3%What it’s built withThe AI
  4. 4.
    langflow-ai/langflow

    Langflow is a powerful tool for building and deploying AI-powered agents and workflows.

    Python+55156.3kAI 1.5%What it’s built withThe AI
  5. 5.
    langchain-ai/langchain

    The agent engineering platform.

    Python+11149kAI 0.3%What it’s built withThe AI
  6. 6.
    github/spec-kit

    💫 Toolkit to help you get started with SDD or any other process!

    Python146.9kAI 47.1%What it’s built withThe AI
  7. 7.
    Comfy-Org/ComfyUI

    The most powerful and modular diffusion model GUI, api and backend with a graph/nodes interface. The fastest local inference engine in the world.

    Python+8144.9kAI 0.3%What it’s built with
  8. 8.
    openai/codex

    Lightweight coding agent that runs in your terminal

    Rust+19133.1kAI 2.8%What it’s built withThe AI
  9. 9.
    plotly/dash

    Data Apps & Dashboards for Python. No JavaScript Required.

    Python+2124.5kAI 0.4%What it’s built withThe AI
  10. 10.
    QwenAudio/CosyVoice

    Multi-lingual large voice generation model, providing inference, training and deployment full-stack ability.

  11. 11.
    NVIDIA/SkillSpector

    Security scanner for AI agent skills. Detect vulnerabilities, malicious patterns, security risks, prompt injection, data exfiltration, and supply-chain risks in Claude Code, Codex, and MCP skills before you install them.

    Python+824.3kAI 19.5%What it’s built withThe AI
  12. 12.
    PrefectHQ/prefect

    Prefect is a workflow orchestration framework for building resilient data pipelines in Python.

    Python+4624.1kAI 9.7%What it’s built withThe AI

Frequently asked questions

What is the most popular open source repo that uses Pydantic?
Significant-Gravitas/AutoGPT, with 187,891 stars on GitHub.

The proof: Significant-Gravitas/AutoGPT on GitHub

What other technologies is Pydantic used with?
With langsmith (3), Rich (3), React (2), FastAPI (2), and Flask (2), out of the 12 repos that use it.
What languages are the repos that use Pydantic written in?
Python (10), Rust (1), and Svelte (1).
How many repos that use Pydantic have commits signed by AI?
11 of the 12; the most, github/spec-kit, with 47.1% of its commits.

The proof: the commits each tool signed in github/spec-kit

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