Top Open Source Design & Prototyping Tools in 2026
A curated collection of the 3 best free and open-source Design & Prototyping tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
draw.io
Free open-source diagramming tool for teams
Stars7,753Last commit15d agoLicenseApache-2.0
OpenPencil
Open-source Figma alternative with AI tools
Stars8,018Last commit13d agoLicenseMITGrida
Free open canvas for designing web apps
Stars2,623Last commit16d agoLicenseApache-2.0
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Showing 3 of 3 open-source tools