Proto.io Alternatives (January 2026)

Build interactive web, iOS, Android, and other low or high-fidelity prototypes right into your web browser. Drag and drop ready-to-use, easily customizable templates, UI components, icons, and more, to prototype in minutes! No coding skills required.

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1.
FluidUI.com - Create Web and Mobile Prototypes in Minutes
https://www.fluidu
.com/

Free lifetime account. Simple to learn, quick to master. Design interactive prototypes for Android, iOS, web and desktop in minutes.

2.
ProtoPie: High-Fidelity Prototyping for Mobile, Desktop, Web & IoT
https://protopi
.io/

Create interactive, realistic prototypes that work like the actual digital product. Ideal for designers prototyping for mobile, desktop, web, or IoT. Try for free.

3.
Free prototyping tool for web & mobile apps - Justinmind
https://www.justinmin
.com/

Easily create web and mobile app prototypes and wireframes with Justinmind UI prototyping tool. It's FREE. Start prototyping now!

4.
Mockplus - Design, Prototype & Collaborate Better and Faster
https://www.mockplu
.com/

Empower your UI/UX design team with top prototyping solutions. Create interactive web or app wireframes and prototypes without any coding skills.

5.
UXPin | UI Design and Prototyping Tool
https://www.uxpi
.com/

Design tool like no other. Prototypes that feel real, with powers of code components, logic, states, and design systems. Join for free!

6.
Online Mockup, Wireframe & UI Prototyping Tool · Moqups
https://moqup
.com/

Moqups is a streamlined and intuitive web app that helps you create and collaborate on wireframes, mockups, diagrams and prototypes — for any type of project.

9.
MockFlow - Online Wireframing and Product Design Tool
https://mockflo
.com/

MockFlow is an intuitive web app to simplify your product design process. A quick way to create and collaborate on wireframes for web, mobile, and desktop apps.