National innovation systems (NISs) have been important in the literature since the 1990s for highlighting the institutional performance of economies and promoting economic development. Inclusion in systemic innovation activities is an emerging area of research. However, the definition of inclusion within innovative activities remains unclear and is associated with numerous forms and characteristics depending on the context visited. Our work highlights the conceptual gap that exists around the notion of inclusive innovation by characterising three forms of inclusion in relation to innovation activities. We thus set out, in the form of a typology, three distinct framings which enable us to identify three different levels associated with specific institutional mechanisms and forms of inclusion. This typology makes it possible to identify appropriate innovation policies, depending on how inclusive innovation is characterised (low, medium, and high). It also helps to clarify the inclusive nature of innovation in NIS approaches.