The aim of this thesis project is to investigate how the discipline of Design could on one hand contribute to the development of strategies and tools able to implement and strengthen a collaborative service developed by a startup, on the other hand identify, engage and enable those collaborative communities able to give an importantcontribution in the phases of the service prototyping. The work of analysis and design is developed on the service thought by the startup Milkplease,which is based on the collaboration among neighbors for the purchase and delivery of grocery shopping.