The development of start‐up communities is seen as critical to the successful development of entrepreneurship in a region. However, it remains unclear what exactly start‐up communities are and how they can be facilitated. Ambiguity concerning the geographical scale and membership of start‐up communities leads to different conceptualisations. In this paper, we apply communities of practice (CoP) theory to understand how conceptualisations of start‐up communities work and how they can be facilitated. To this end, we qualitatively study start‐up communities in Sydney, Melbourne and Canberra, Australia. Our results show that start‐up communities that are confined to a particular workspace strongly resemble a CoP. Furthermore, many elements of CoPs can also be found in regional start‐up communities. Finally, we find that workspace communities have more direct and top‐down facilitation activities, while regional start‐up communities have more indirect and bottom‐up facilitation activities.