The best free alternative to Balsamiq Wireframes is Pencil Project, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Balsamiq Wireframes and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Balsamiq Wireframes are Penpot, Figma, Penpot Desktop and Napkins.dev.
Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.
Open-source design platform offering web-based and self-hosted workflows, code inspection in HTML and CSS, adaptive layouts with CSS Grid and Flex, real-time collaboration, auto layout features, reusable components, design tokens, layer support, plugins, and no tracking.
Figma is a web-based platform offering a robust set of tools for vector graphics editing and prototyping, along with offline desktop apps for seamless workflows. Designed specifically for UI and UX design, it emphasizes real-time collaboration, visual versioning, and vector networks to streamline the designer's work.
Penpot Desktop is an unofficial desktop application for the open-source design tool, Penpot.
An open source wireframe to app tool powered by Llama 3.2 vision. Upload a screenshot of a simple site/design & get code.
Open-source design editor for vector and interface projects featuring AI-powered generation, .fig and .pen file support, design-to-code export, real-time P2P collaboration, linting, tokens, advanced programmability, Vue SDK, and privacy-friendly operation.
Combines code-driven and visual editing workflows for interactive UI design, high-fidelity prototyping, real-time team collaboration, reusable components, inline commenting, mobile previews on Android/iOS, and smooth developer handoff for efficient workflow.
Whimsical is a collaborative visual workspace for creating flowcharts, wireframes, virtual sticky notes, and more!.
A streamlined web app that helps you create and collaborate in real-time on wireframes, mockups, diagrams and prototypes.
Feature-rich, open-source Wireflow offers a collaborative platform for online creation of complex user flow prototypes. Ideal for team work in UI design, wireframing, and mind mapping, promoting idea sharing in real-time environment aided by modern whiteboard features.
A collaborative design tool offering wireframing, prototyping, and design specs creation in a single browser-based platform. Integrate seamlessly with your workflow via API, sync with Sketch and Photoshop, and utilize a vast library of assets. Streamline design-to-dev with automated code generation.
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It's ok as an alternative, but it fails in creating interactive wireframes