Base is Uber's design system unifying its ecosystem of products, riders, drivers, Eats, freight, under one framework: principles, branding, components, and specialized patterns for individual product verticals.
It explicitly documents "specialized patterns" that scale the core system for distinct product verticals (rider app vs. driver app vs. Eats), a concrete model for any company running multiple, meaningfully different products under one brand.
Designers at companies with several distinct product lines under one brand who want a real example of a shared core system that still flexes per vertical.
It includes dedicated screencasts and playbooks for learning the system, worth checking specifically if the goal is onboarding a team rather than just browsing components.
Uber's foundational design system, with UI components and visual language for its products.
