Balsamiq is a popular low‑fidelity wireframing tool that helps designers sketch quick UI concepts. If you’re looking for other UI/UX prototyping solutions—whether you need higher‑fidelity mockups, collaborative cloud‑based design, or advanced interaction capabilities—here are 20 strong alternatives to consider.
Get targeted exposure with custom position pinning and highlighted placement.
Cloud‑based design platform for real‑time collaboration, vector editing, and interactive prototyping.
Mac‑only vector design tool with a rich plugin ecosystem, ideal for UI design and high‑fidelity prototyping.
All‑in‑one UX/UI solution from Adobe offering design, repeat grids, voice prototyping, and seamless integration with Creative Cloud.
Powerful wireframing and prototyping tool that supports complex interactions, conditional logic, and data‑driven prototypes.
Design, animate, and prototype with a focus on motion design and seamless hand‑off to developers.
Web‑based platform for rapid prototyping, user testing, and design hand‑off with simple drag‑and‑drop UI.
Advanced prototyping tool that supports design systems, interactive states, and code‑level fidelity.
Design and prototype with React‑based components, allowing high‑fidelity interactions and animations.
Web‑based prototyping suite that turns static designs into fully interactive mobile and web prototypes.
Wireframing and high‑fidelity prototyping tool with built‑in UI kits, interactions, and user testing features.
Online mockup, diagram, and prototype creator with an intuitive drag‑and‑drop interface.
Minimalist web app for quick low‑fidelity wireframes, perfect for sketch‑style concepts.
Browser‑based prototyping tool with a large library of UI elements and interactive linking.
Fast prototyping software with drag‑and‑drop components, auto‑layout, and collaboration features.
Free, open‑source GUI prototyping tool with built‑in shapes for desktop, mobile, and web interfaces.
Diagramming and wireframing platform that supports flowcharts, UI mockups, and real‑time collaboration.
Design hand‑off and collaboration tool that syncs designs from Sketch, Figma, or Adobe XD into developer‑ready specs.
Free design and prototyping tool from Facebook, focused on advanced interaction and animation for mobile apps.
Cross‑platform vector design app with UI kit libraries, suitable for creating wireframes and high‑fidelity mockups.
Open‑source design and prototyping platform that runs in the browser, supporting team collaboration and SVG‑based design.