UXPin

UXPin is a prototyping and design platform emphasizing component states, logic, and code-based design systems. It supports real-time collaboration, letting multiple users edit or comment. Designers can define interactions that mimic real app logic, like conditional navigation or dynamic fields. The “Merge” feature allows integration with actual React components from a dev codebase, ensuring design fidelity. UXPin also includes user testing capabilities, collecting usage analytics. A limited free tier is available, while advanced merges or large projects require subscription. UXPin helps teams unify design and production code for consistent UI.