Participation in alliances has long been an important strategy for Canada to pursue initiatives on the world stage. Just as Canada’s key alliances are facing new geopolitical pressures, the country’s standing within these alliances is facing new challenges, often due to lagging investments. Canada has recognized the importance of the next generation of quantum technologies for a variety of applications; however, Canada’s level of public investment remains somewhat modest compared to other leading nations. Increased public investment in quantum science and technology can help secure Canada’s position within its alliance politics, not only because general investment will alleviate allies’ concerns about budgetary allocations, but also because specific quantum technologies are poised to address the unique challenges facing Canada’s key alliances.