Alternatives to Balsamiq

Collaborative interface design tool

Mac-native vector design app that pioneered the modern UI workflow with symbols, shared libraries, and a deep plugin ecosystem.

Lightweight prototyping platform for turning images and screens into clickable mobile and web prototypes.

Free hand-drawn whiteboard with collaboration and an embeddable editor

Open-source design and prototyping platform built on web standards, with a self-hostable server and SVG-native files.

High-fidelity prototyping tool that simulates sensor input, IoT triggers, and complex interactions without writing code.