The best alternatives to Prototyping Tools are InVision, lstore.graphic, and Atomic. If these 3 options don't work for you, we've listed over 10 alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
The only Visual Collaboration platform built for enterprise-wide collaboration. Freehand by InVision is exclusively designed to help all teams unlock productivity, insight, and connection.
Bringing the world's ideas to life. Started as a side-project in 2013, we're now home to nearly 2 million individuals and teams around the world who use Marvel to make ideas a reality.
React Proto aims to give developers and designers the tools necessary for creating clean, organized, and intentional code from the beginning of the development process. Defining your components, their hierarchy, and how they interact via state and props, can alleviate the need for refactoring, and unnecessary code as your application scales.
Roughups lets you create hand drawn wireframes on your iPad and easily make them interactive with loads of custom components and tools. Once you're done you can share you creations on the web. Or to give more realism add text fields, toggles, cameras and more.