Best Open Source UI/UX Design

The open-source Claude Design alternative. Local-first native desktop app for macOS and Windows. Composable skills, brand-grade DESIGN.md design systems, and ready-to-use plugins.

Versatile design and prototyping platform for teams. Create, collaborate, and bring your ideas to life with powerful vector editing tools.

Free open-source vector editor with nondestructive node-based workflow. Create graphics procedurally with infinite scalability. Runs in browser, exports SVG/PNG/JPG.

Quant-UX is an open-source tool for creating interactive prototypes, conducting user tests, and analyzing results to improve UX design.

An open-source design platform featuring a customizable canvas editor, AI-powered tools, and React components for building modern web applications.

Build web apps, internal tools, and customer portals fast with visual editing, drag-and-drop design, and seamless codebase integration. Deploy anywhere without limits.