The concept of Digital Twin Cities (DTC) entails creating virtual replicas of cities that collect and analyse large volumes of data to enhance urban planning, infrastructure management, and decision-making. This approach allows the anticipation of urban issues and the simulation of solutions through digital representations of key aspects such as mobility, sustainability, and citizen behaviour. Initiatives in cities like Barcelona, Bologna, and Helsinki have been noteworthy for their implementation of digital twins to tackle complex urban challenges. However, these technological advances raise questions about their impact on democratic governance, citizens’ privacy, and potential technocratic biases. The accumulation of data cannot depoliticise urban decisions nor ignore social inequalities. A framework that integrates citizen participation in the design and development of these models is essential to ensure their transparency and openness. The main challenge lies in using digital twins to promote more democratic governance focused on improving the quality of life for all residents, beyond mere economic efficiency. To achieve this, it is vital to link descriptive data with social perceptions and ensure that the technology serves the common interest.