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Over the past decade, public services have introduced innovative approaches of a new kind, formally breaking with the managerial reforms hitherto deployed. The concrete forms that these initiatives can take seem varied, but they use similar techniques, under the same banner of “service design.” But to what extent do they share such an assertion? Based on which issues? As part of an ANR research project entirely focused on these new forms of public innovation (FPI), the authors of this article outline the main features of this unprecedented landscape. Using a database of two hundred cases, the challenge here is to provide readers with a description of the phenomenon of the emergence of these innovations “by design” carried out over the last ten years in very different public institutions. Four types of FPI are identified.