While literature and practice acknowledge the potential of service innovation as well as digitally enabled innovation processes, the diverse innovation process literature lacks a process model which combines these two aspects. This systematic literature review aims at filling this gap by analysing innovation process theories and approaches with a specific focus on service and digital innovation. 25 conceptualisations of innovation processes were distilled and analysed in detail to present a ‘digital innovation process for services’ model which includes steps on three levels. Consequently, this literature review expands the current state-of-research and acts as the groundwork for further innovation research projects.