The emergence of shared mobility services in cities around the globe, such as shared bicycles, cars, scooters, and ridesharing, caused impacts on urban mobility, requiring actions from local authorities, altering people’s locomotion habits, and opening space for new businesses. The purpose of this research was to identify the main impacts of the emergence, and expansion of shared mobility services on urban mobility, with a focus on actions from local government, and peoples’ locomotion habits. This qualitative research was a comparative study between two cities, Lisbon, and São Paulo, which experienced a rapid increase of shared mobility services in recent years. During observations and data collection, it could be seen that micromobility services, such as shared bikes and scooters, caused problems related to parking, traffic zones, and accidents with users, despite the benefits related to availability of alternative means of transportation. Regarding creation of new laws, the city of São Paulo has showed more intervention on creating new regulation to control such businesses. On the other hand, local authorities in Lisbon showed greater effort on promoting the availability of shared mobility in the city and stimulating its use. An important fact observed was that Lisbon residents can use their public transport card – Lisboa Viva – on some of the available shared mobility services in the city, indicating that the integration between the different types of transport in the city may also be a solution for the urban mobility. Moreover, it was observed the acceptance of these services by population, which can be demonstrated by their rapid expansion and the entry of new shared mobility providers in both cities. Due to the fact that the emergence of shared mobility services is a recent event, further researches are necessary to keep monitoring the impacts and development of such services on urban mobility in cities around the world.