This chapter puts forward the potential of comparative urban research in analyzing the politics of diversity governance. As cities become increasingly networked, urban comparison constitutes a valuable tool to analyze the multi-scalar processes that shape urban diversity, and move away from an exclusive reliance on the national scale as the dominant framework for understanding diversity governance. This chapter aims to lay the groundwork for a research agenda that embraces the comparative approach not only as a methodological tool but as a critical framework for analyzing the policies and politics of diversity from a global perspective. The chapter promotes the use of different comparative strategies, such as identifying common patterns, tracing differences, and situating cases within larger systems. These strategies help unpack the many layers that shape how urban diversity is governed. By linking local practices to broader transnational networks, the chapter shows how cities act as testing grounds for both inclusive and exclusionary policies. It also explores how city makers respond to, adapt to, and sometimes challenge dominant approaches to diversity.