Impact Market aims to transform public procurement like Google and Facebook transformed marketing. Impact Market facilitates payments for outputs, and allows public institutions to pay for the projects that create the outcomes they seek. Instead of choosing one service, public authorities can work with multiple companies, and allow them to compete and innovate in creating the results. They can experiment and scale the projects that deliver results. We are focusing on new mobility services as a starting point, allowing cities to pay for innovative mobility services which reduces their use of personal cars.