Urbanisation at an accelerated rate causes cities to tackle increasing problems that combine social inequalities with environmental problems and poor administrative management. This chapter investigates how urban technologies, including artificial intelligence, Internet of Things and participatory digital platforms, can achieve social innovation for creating more inclusive, sustainable and equitable urban areas. This chapter compares Barcelona along with Medellín, Seoul through multiple case studies to demonstrate how technology-based interventions improve resident participation and digital accessibility and sustainable transportation systems and city-wide resistance capabilities. This chapter integrates empirical data with critical analysis because it bases its research on social innovation theory, together with critical technology studies and inclusive urbanism, while using a multi-method qualitative approach. The success rate of urban technological initiatives was found to depend on three key factors identified through comparative case analysis: participatory governance, ethical data practices and socio-political context, as well as infrastructure development and innovations. The research demands a transformation from current technological beliefs to human-focussed and justice-emphasising systems that ensure fair distribution in city development approaches.