Welcome to the #1
Online Prototyping Tool

Collaborative, Real-Time Prototyping

Prototype using hundreds of built in widgets and icons or upload your own content from Sketch, Photoshop or other tools.

Live Video Hangouts, Comments and Chat

Connect designers and developers together in live presentations to communicate your ideas without ever leaving Fluid UI.

Design on Desktop. Test on Mobile.

Preview your prototypes as you build them and test your ideas with customers early and often.

Interactive, Collaborative Design

Create, share and communicate your ideas with your entire team - no matter where they are in the world.

Used by the very best product teams in the industry

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Start now. Get your entire team prototyping online together in the next 15 minutes

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Or see our training and tutorials.