Alloy
Alloy is the first lifelike AI prototyping tool for product managers, built to turn ideas into high-fidelity, clickable prototypes. Recreate existing product pages in minutes, keep component libraries and design systems in sync, and explore new flows with pixel-perfect realism. Use AI prompting and a visual editor to swap copy, refine layouts, preview micro-interactions, and validate UX across web apps, SaaS, and mobile. Because Alloy prototypes look and behave like the real product, stakeholders grasp concepts, customers can test realistic journeys, and engineers get clear specs for faster handoff. Map edge cases, empty states, and breakpoints without rebuilding. Collaborate: share a link to your canvas, collect comments, and iterate to alignment in hours not weeks. Alloy accelerates discovery, reduces rework, and de-risks launches with user feedback. Build your next feature today with Alloy—the lifelike, no-code prototyping platform for speed, realism, and team alignment with ease.
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Penpot
Penpot is the free open-source design tool that allows true collaboration between designers and developers. Hand-off drama disappears, thanks to features like CSS Grid, Flex Layout and the Code Inspect tab.
Designers can create stunning designs, interactive prototypes, design systems at scale, while developers enjoy ready-to-use code and make their workflow easy and fast.
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Mockitt
Design attractive prototypes that highlight your concept, and appealing to your clients. Create pixel-perfect icons and scalable vector graphics with a neat, powerful tool. Skip the boring, repetitive bits and focus on form and shape. Drag and drop to create wireframes and prototypes, driving collaboration in your team and delivering better user experiences. Even beginners can work like pros with the vast component libraries and industry-specific templates. Add and typeset widgets as well as create interactive events by easy drag-and-drop actions. Use our fully-stocked UI component libraries to create prototypes with realistic elements that resemble and simulate actual UI designs. A vast repository of ready-to-use and flexible templates that you can easily customize to create stunning Web and Mobile mockups and prototypes. Find everything you require, including frequently-used layout blocks and widget options.
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ProtoPie
The way you speak, the way you prototype Interactive prototypes for the digital products of tomorrow. Create the most realistic prototypes easily. Accelerate your workflow with components and supercharge your prototypes with sensors, variables, and more. Import your designs from your favorite design tools. Prototyping has never been this easy on macOS and Windows. Test your amazing creations on smartphones, tablets, desktop, and the web. All in a heartbeat.
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