Based on a sociological survey of about one hundred Uber drivers in three cities (Paris, London, Montreal), this book aims to examine, through this emblematic case, the changes in employment status and forms of work organization brought about by the deployment of platform capitalism. It does so from an intersectional perspective, paying attention to the intersection of social relations of class, gender and race. In particular, it shows how Uber deploys a “racial platform capitalism”. Indeed, Uber’s business model is based on an oversupply of drivers compared to demand, available at any time to provide a rapid response and prevent demand from shifting to a competing platform. As part of the sub-proletariat, racialized populations are a reserve army of workers essential to the deployment of the platform.