6Aika — Open and Intelligent Services is a strategy for sustainable urban development involving Finland’s largest cities, the six cities Helsinki, Espoo, Vantaa, Tampere, Turku and Oulu. The project implements the objectives of the 6Aika strategy and its open data priority area. In the project, six cities will open up their data resources as widely as possible into open data using common and jointly agreed and developed operating models, publishing platforms and licensing models. Special attention will be paid to commonly agreed standards, common usability, sharing of best learning and practices and co-working.Cities provide a huge amount of valuable information: for example, spatial data, environmental information, traffic data, statistics and economic data. Companies can use this information in their business using data, for example, as a raw material for new services. The project will strengthen the innovation performance of enterprises and include activation measures to deliver applications implemented by companies. Innovations can create new, internationally exportable business, and the six cities are an excellent test environment for companies and markets for new services. The project will create and develop further, in cooperation with six cities, companies and other actors, permanent structures and operating models that promote the production, opening, publishing and use of data that merge into the normal operation of cities. The focus is on close cooperation between data producers and users and, for example, agreed operating models, interface standards and data distribution technologies, which enable solutions to be scalable and benefits multiplying by opening programming interfaces to the selected information systems of cities for the benefit of all interested parties. The project supports ecological and economic sustainability by promoting the development of intangible products and services based on data and the creation of new business opportunities. Open data helps to conduct studies, analyses and visualisations on nature, climate, the environment and renewable energy sources, which improve awareness, know-how and enable more accurate decision-making and forecasting. The transparency of cities and the openness of information promotes social and cultural equality and equality. In addition, a gender perspective will be taken into account in the activities of the project.