This document discusses various companies and business models that incorporate principles of the circular economy. It describes companies in sectors like mobility, housing, food, and energy that utilize resource efficiency models of sharing, optimization, and dematerialization. Examples highlighted include Verybite, a Chinese social cooking and food delivery platform; Oatkitchen, a Finnish company substituting animal proteins with vegetable sources; Tuup, a Finnish mobility platform that provides all services in one application; and Bettervest, a German crowdfunding co-creation platform for housing. The document advocates user-focused approaches and digital technologies to drive more sustainable lifestyles through circular business models.