Drawing on contemporary and historical discourse around UK business schools and insights from the sociology of scientific knowledge, we argue that business schools should be understood and judged, not as they typically have been, as engines of knowledge production, but as engines of credibility production. Credibility, we argue, is central to the attractiveness of business schools to students and other key stakeholders and therefore credibility, and the mechanisms through which credibility are maintained, should be at the center of strategic thinking within business schools. We argue that over-reliance on funding from corporate sources can have profound consequences for the ability of schools to continue to produce credibility. This article focuses primarily on the experiences of business schools in the UK.