Cities are identifying the smart city vision to develop the city an urban community and engine of responsible innovation. The analysis elucidates that European cities are rethinking on urban planning by adopting a smart city framework, leading to responsible urban innovation and future, fostering collaborative processes that contribute to sustainable and social urban growth and innovation to improve the quality of life. A smart city helps to shape the city a smart responsible innovative urban community. Cities are defining smart urban planning, enabling smartness as an ability to shape urban organisational, innovative and collaborative urban spaces. European cities are going smart, tracking a framework for collaborative innovation, leading to the urban community an engine of social innovation. Sustainable urban future relies on cities that will develop smart urban communities for responsible innovation and good life, promoting collaborative and multi-actor innovation, and following community-led and human-centred view to urban development and innovation.