Abstract Between 1957 and 1984, Belgian consumers were represented by two comparative testing organizations: Test-Achats and the Union Féminine pour l’Information et la Défense du Consommateur. These two consumer organizations were fundamentally dissimilar in terms of their staff, their audience, and their ideological framing of consumer interests. Only the “politically independent” Test-Achats joined the International Organization of Consumer Unions (IOCU), even though it was initially smaller and weaker than the Union Féminine, the social-democratic alternative for consumers. A comparative analysis of Belgian organized consumerism reveals how, after 1957, the consumer interest was gradually reframed to fit a hegemonic definition. A private and commercial model of consumer representation was actively promoted over and against a public model through a complex transatlantic dialogue. Moreover, I argue that the international connections – or lack thereof – of the two organizations are essential to explain their success (or failure). The diffusion of organized consumerism during the 1950s and 1960s was financially and ideologically connected with the Keynesian-Fordist regulatory framework. The attack on embedded liberalism in the late 1970s thus posed serious challenges. Mapping the choices and trajectories of Belgian consumer activists in an international context helps us to understand these challenges better.