Top Cloud‑Based UI Prototyping Platforms with Real‑Time Feedback

Web‑first design tool with real‑time multi‑user editing, comment threads, and prototype sharing via shareable links.

Vector‑based UI/UX design platform offering co‑editing, live preview on devices, and integrated feedback via comments.

Prototyping suite with real‑time collaboration, sticky notes, and user testing integrations for instant feedback.

Popular macOS design app extended with Sketch Cloud for sharing prototypes, collecting comments, and version control.

All‑in‑one design, prototype, and handoff platform with live commenting, user testing, and analytics.

Advanced prototyping tool with cloud workspaces, real‑time stakeholder comments, and interactive documentation.

Design system‑focused prototyping with collaborative editing, interactive states, and built‑in usability testing.

High‑fidelity interactive prototyping with live code components, real‑time collaboration, and instant feedback loops.

Web‑based prototyping platform offering drag‑and‑drop UI building, real‑time sharing, and comment‑based feedback.

Low‑fidelity wireframing tool with cloud workspaces, live commenting, and quick iteration cycles.

Full‑stack prototyping with interactive widgets, cloud sharing, and collaborative feedback via comments.

Rapid prototyping platform with cloud collaboration, real‑time comment threads, and component libraries.

Open‑source, web‑based design and prototyping tool supporting multi‑user editing and in‑app feedback.

Online whiteboard that doubles as a low‑fidelity prototyping space with live cursor, sticky notes, and instant feedback.

Collaborative flowcharts, wireframes, and mockups with real‑time editing and comment capabilities.

User‑flow diagramming tool that syncs with design files, enabling live comments and stakeholder reviews.

Browser‑based prototyping with drag‑and‑drop UI elements, cloud sharing, and real‑time feedback threads.

Design‑to‑code platform that lets teams prototype responsive sites, share live previews, and gather feedback instantly.

Figma/Sketch/Adobe XD plugin that turns designs into interactive prototypes with live preview and comment sync.

Design hand‑off tool that also hosts interactive prototypes and supports comment‑based feedback from developers.

Provides QR‑code based live preview on mobile devices, enabling stakeholders to comment directly on the prototype.

High‑fidelity prototyping with sensor‑based interactions, cloud sharing, and real‑time comment collaboration.

While primarily a user‑session analytics tool, it integrates with prototypes to collect live feedback and heatmaps.

User testing platform that links directly to Figma/Adobe XD prototypes, delivering real‑time usability feedback.

Offers live moderated testing on shared prototypes with instant video feedback and annotations.

Facilitates live remote usability sessions on prototypes with real‑time comments and screen sharing.

Adds heatmaps and feedback widgets to hosted prototypes for instant insight collection.

Integrates with Figma/Adobe XD prototypes to run moderated/unmoderated tests and capture real‑time feedback.

Built‑in user testing module that gathers click‑through data and comments directly on prototypes.

Provides a live preview environment where developers can leave comments directly on interactive screens.

Combines design and brainstorming; FigJam boards can be linked to Figma prototypes for collaborative feedback.

Supports simultaneous editing and in‑app commenting, enabling instant stakeholder feedback.

Real‑time multi‑user editing with comment threads and live preview URLs for instant feedback.