All over the world, we observe a trend of people moving from rural and poorly urbanized areas to larger cities and metropolises. This is due to the development of civilization, the need for work, and a greater quality of life. Sudden population growth in cities is associated with many problems that are often quite difficult to locate and repair. The idea of Smart City was created to improve urban processes, create a concept for the development of all areas of the city so that all elements in it are synchronized and harmonized with each other. The article compares Smart solutions from Singapore, Zürich and Wroclaw. The idea of the civic budget and the interaction between local administration, residents and stakeholders were also discussed. The author describes the concept of using crowdsourcing to acquire knowledge by city leaders, as well as the impact of these processes on the development of Smart City.