Research on the evaluation of large-scale public-sector reforms is rare. This article sets out to fill that gap in the evaluation literature and argues that it is of vital importance since the impact of such reforms is considerable and they change the context in which evaluations of other and more delimited policy areas take place. In our analysis, we apply four governance perspectives (rational-instrumental perspective, rational interest-based perspective, institutional-cultural perspective, and chaos perspective) in a comparative analysis of the evaluations of two large-scale public-sector reforms in Denmark and Norway. We compare the evaluation process (focus and purpose), the evaluators, and the organization of the evaluation, as well as the utilization of the evaluation results. The analysis uncovers several significant findings including how the initial organization of the evaluation shows strong impact on the utilization of the evaluation and how evaluators can approach the challenges of evaluating large-scale reforms.