Frame0 is a desktop wireframing and prototyping app (Windows, macOS, Linux) built around a deliberately hand-drawn, sketchy look, positioned as a lighter, more modern Balsamiq alternative.
Its UI component library plus 1,500+ sketch-style icons and built-in flowchart/diagram support cover more than pure screen wireframes, and an AI assistant (bring your own API key from OpenAI, Anthropic, Google, or Grok) can generate a first-pass wireframe from a text prompt.
Good for the early, deliberately-rough stage of a project: teams who want low-fidelity screens that don't invite premature feedback on colors or polish, and like working in a real installed app rather than a browser tab.
Free covers the core wireframing; templates, HTML/PDF export, and diagramming sit behind a paid upgrade, and the AI features require your own API key with its own separate cost.
Make hand-drawn style wireframes quickly and easily.
