“Smarter Together” is the joint Smart City Lighthouse project from Vienna, Munich and Lyon. It is co-funded by the EU as part of the Horizon 2020 research program. In selected districts, technical and social innovations as well as innovative processes contribute to sustainable urban renewal. These contribute to the achievement of the UN climate goals. In addition, impulses for a positive social dynamic are to be set. More than 30 project partners, from administration, research as well as the industry and SMEs participate in the project. The project comprises a three-year implementation phase (2016-2019) and a subsequent phase of monitoring and evaluation (until 2021), which also includes further deepening the replication of the project.