Proto.io is a powerful web‑based prototyping platform that lets designers create fully‑interactive mobile and web prototypes without coding. Looking for other tools that offer similar or richer features for UI/UX design, collaboration, and user testing? Below is a curated list of 20 top alternatives to Proto.io, covering everything from low‑fidelity wireframing to high‑fidelity interactive prototyping.
Get targeted exposure with custom position pinning and highlighted placement.
Collaborative, cloud‑based design tool with real‑time editing, vector editing, and interactive prototyping.
All‑in‑one UX/UI solution for designing, prototyping, and sharing interactive experiences across platforms.
Mac‑only vector design app with robust plugin ecosystem and seamless handoff to developers.
Cloud platform for creating clickable prototypes, design systems, and collaborative feedback loops.
Advanced prototyping tool for complex interactions, conditional logic, and data‑driven simulations.
Simple web‑based prototyping suite with user testing, handoff, and design system features.
High‑fidelity interactive design tool that blends visual editing with React‑based code for dynamic prototypes.
Design system‑focused platform offering interactive prototyping with logic, variables, and conditional states.
Rapid low‑fidelity wireframing tool that mimics hand‑drawn sketches for early‑stage brainstorming.
Full‑featured prototyping suite supporting web, mobile, and desktop with advanced interactions and data integration.
Mac‑only app for creating animated and interactive UI designs with timeline‑based motion.
No‑code prototyping tool that lets designers add complex gestures, sensors, and logic to mobile prototypes.
Visual web design platform that generates production‑ready HTML/CSS/JS while allowing interactive prototypes.
Collaboration and handoff tool that bridges design and development with style guides and interactive specs.
Free design tool from Facebook for building high‑fidelity interactive prototypes, especially for mobile.
Browser‑based prototyping platform with drag‑and‑drop components and real‑time sharing.
All‑in‑one design, prototype, and collaboration tool with extensive UI kits and rapid interaction building.
Online wireframing and prototyping suite offering UI libraries, flowcharts, and stakeholder feedback.
Minimalist web tool for quick low‑fidelity wireframes with a clean, distraction‑free interface.
Cross‑platform vector design app with prototyping capabilities and cloud sync.