Penpot

Penpot is an open-source design and prototyping tool that lets product teams create interfaces, design systems, and interactive prototypes using open web standards like SVG, which means design files aren't locked into a proprietary format only readable by one company's software. Because it runs entirely in the browser and is self-hostable, organizations with strict data governance or a preference for owning their own tooling infrastructure can run Penpot on their own servers rather than relying on a third-party's cloud service to store design files. Its feature set covers the core workflow designers expect, including vector editing, reusable components, design tokens, grids, and interactive prototyping with transitions between screens, aiming to be a viable alternative to closed-source design tools rather than a stripped-down clone. Because Penpot's files are based on open SVG, developers can inspect and extract exact CSS and layout values directly from a design without needing a separate paid inspection tool, narrowing the usual gap between design handoff and implementation. Its open-source nature also means the broader community can contribute plugins and features rather than waiting entirely on one company's roadmap. Penpot is used by design and product teams, especially those in the open-source and privacy-conscious software community, who want professional-grade design tooling without dependency on closed, proprietary software controlled by a single vendor.