This article illustrates how social structures and behaviours of scientists in the societal sub-system of open science resemble patterns analysed in The Gift, an essay written by Marcel Mauss nearly 100 years ago. The presented analysis goes beyond existing interpretations of gift-giving in science. The latter has mainly focussed on the exchange of knowledge and citations. I argue that The Gift explains also identity, competition, co-opetition, rituals and punishment. Mauss’s Gift is seen as a complementary model to existing economic and sociological approaches regularly used to analyse structures and behaviours in open science. By accentuating such an anthropological approach, I conclude that the Gift provides explanations for the stability and the expansion of the open science community.