Gaps
Not public
Famous brands whose design systems are internal or only partly public. Any Figma file claiming to be one of these is likely fan-made.
Spotify · Encore
Internal. Public UI work is Backstage UI (#84).
Airbnb · DLS
Blog posts only
Meta · (none public)
Open sources tooling (React, StyleX), not a branded library
X / Twitter · (none public)
Not public
Discord, Duolingo · (none public)
Not public
Stripe · Sail (internal)
Only the Stripe Apps UI toolkit is public in Stripe docs
Bloomberg · (none public)
Not public
LEGO, Mercedes-Benz, BMW, Bosch, IKEA (Skapa), Sainsbury's, Intuit · Various
No verified public repo or official Figma Community file