Open-source design and prototyping when lock-in is the brief.
Open Penpot
Free options · 4.3 rating
Figma
The shared canvas most product and brand teams already live in.
Free options · 4.8 rating
Figma is the browser design tool for interfaces, systems and live critique. Files stay current, comments sit on the artboard, and developers inspect without a PDF ritual. Still the default — which is both its strength and the reason to stay sharp.
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Added 23 October 2025. Listed under Best design and prototyping tools for product teams.