The Defense Advanced Research Projects Agency (DARPA) in the United States is renowned for its success in funding radical innovation. This chapter provides an overview of various government agencies that have adopted the core DARPA model outside the defense space in a wide spectrum of areas, such as for homeland security (HSARPA), intelligence (IARPA), energy (ARPA-E), health (ARPA-H), and climate (ARPA-C) in the United States, as well as several other notable examples in Europe and Asia, such as JEDI and ARIA. The chapter compares these groups to the DARPA model and identifies key differences that can offer lessons to others seeking similar outcomes. The chapter also notes the existence of other agencies that were missed due to time constraints, so that a deeper analysis may continue of government agencies around the world pursuing radical innovation.