Proto.io

Browser-based prototyping tool for high-fidelity mobile and web prototypes with 250+ native-like UI components, timeline animations and Lottie support. It suits designers who need realistic interactions without code. After the 15-day trial, accounts can drop to a limited free plan (1 project, 5 screens); no AI features are advertised.

Information

Platform
Cost: $ 288
Pricing: Freelancer, $24/month billed annually ($29 monthly); 1 user, 5 active projects

Features

FreeFree plan

AINo AI features advertised

OfflineExports HTML/PDF for offline viewing

Pen ToolNot confirmed

CollaborationNot confirmed

CommentsComments and discussion threads

HandoffNot confirmed

ArtboardsScreens rather than artboards

SymbolsUI component libraries, containers

3D TransformNot confirmed

ResponsiveNot confirmed

PrototypingTimeline animations, 80+ events

Proto.io is a UI Design tool for Web. A paid plan costs about $288 a year, and there is a free plan. In our comparison it supports comments, symbols and prototyping. Offline and Artboards are only partly supported. It does not offer AI.

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