Open Source Alternatives to Balsamiq

A design and prototyping tool that enables teams to create low-fidelity wireframes and interactive prototypes, leveraging AI assistance and collaborative editing to clarify product ideas quickly.

Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to Balsamiq give you an option you fully own. They run locally on your own device, so your data never leaves your machine. This page lists 1 open source alternative to Balsamiq. The most popular is Pencil. It uses the GPL-2.0 license.