Best Open Source Alternatives to Justinmind

Compare the best free and open-source alternatives to Justinmind — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated August 2026 · 6 alternatives

Justinmind

Proprietary SaaS

PricingFreemium

Platformsdesktop, windows, macos

WebsiteVisit site

Justinmind alternatives compared

Open-source alternatives to Justinmind, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Excalidraw	128,780	MIT	WebLinuxmacOSWindows	Yes	Jul 2026	Visit
tldraw	49,533	Apache-2.0	Web	Yes	Aug 2026	Visit
Wireflow	4,160	MIT	LinuxmacOSWindowsDocker	Yes	Sep 2024	Visit
UI Builder	1,404	Apache-2.0	Web	No	Aug 2025	Visit
OpenWireframe	0	MIT	Web	Yes	—	Visit
Quick Mockup	0	MIT	Web	No	—	Visit