In the course of the EU project SMARTER TOGETHER, the city of Vienna decided to develop a data platform for the demonstration projects. With the support of the FIWARE Foundation, the data platform was developed and provisionally implemented with an external cloud solution. The data platform is thus used for the monitoring of the EU project and is suitable for data exchange including visualization with external stakeholders. In addition to the project, the city of Vienna intends to use the data platform as an IoT middleware and data source.