The best alternatives to Protobulb are ProtoPie, Lunacy, and Figmac. If these 3 options don't work for you, we've listed a few more alternatives below.
ProtoPie is the easiest tool used to turn your UI/UX design ideas into highly interactive prototypes for mobile, desktop, web, all the way to IoT. Designers can explore, validate, and test design solutions and ideas by creating very realistic, production-like prototypes without code and the help of engineers.
Powerful vector design tool. Icons, photos, illustrations, and AI tools inside to help you focus on the design tasks. Real-time collaboration for teams. Native apps for Windows, macOS&Linux to work fast online and offline on fancy laptops or potato computers.
Unchain your Team, your Clients and your Design. Show your UX/UI Designs seamlessly on the devices of your team members and clients. Wherever they are. Instantly, live and without leaving Sketch or exporting any artboard. No App or sign up needed.
This is a project I had built for some designers new to React I was working with 😄 ! You can convert simple CSS components to React styled-components by pasting in the CSS into the app 🚀!