Gradio

The fastest path from ML model to shareable demo. Gradio lets you wrap any Python function in a web UI with literally three lines of code — input component, output component, done. If you've built a model and need stakeholders to try it today, nothing else comes close.

Streamlit is the main competitor — more flexible for dashboards and multi-page apps, but slower to prototype a single-function demo. Chainlit focuses on chat interfaces. Panel is powerful but has a steeper learning curve. Commercial options like Hugging Face Spaces actually run Gradio under the hood.

You get pre-built components for images, audio, video, chat, and file uploads. Sharing is instant — Gradio generates a public URL for 72 hours. The Hugging Face integration means your demo can live permanently on Spaces for free.

The catch: Gradio is a demo tool, not an app framework. The moment you need custom layouts, multi-page navigation, or production-grade auth, you'll hit walls. For anything beyond "try my model," you're better off with Streamlit or building a proper frontend.