In a proclaimed age of ‘post-truth,’ scholars have raised concerns about the spread of false information and the questioning of epistemic authorities. In this paper, we develop an analytical model to capture the digital transformation of knowledge order. Drawing on insights from social epistemology, sociology and history of knowledge, and media history, we identify epistemic practices as basic elements of knowledge order. We then analyze how epistemic practices are organized into an overarching structure of knowledge phases, contexts, roles, and hierarchies. Digital media tend to destabilize the traditional knowledge order. This destabilization is characterized by a more flexible order of phases, a dissolution of boundaries between contexts, an opening of professional roles to new actors, and a flattening of hierarchies.