In recent years, short supply chains have grown and become a central object of regional food governance. Among the different projects, this paper will focus on the governance of two online collective short food supply chains. Based on a comparative analysis of a series of nine cases studies and a neo-institutional approach, the paper explores the different forms of governance associated with the same type of transaction and examines their coexistence. In order to reduce coordination problems and to deal with the attributes of the transactions, some mechanisms mitigate major opportunistic behavior: the purchase/resale of products. However, our case studies suggest that internal and external rivalries are difficult to manage.