We develop an integrative conceptual framework and research agenda for studying epistemic authorities in the digital age. Consulting epistemic authorities (e.g., professional experts, well-informed laypeople, technologies) can be an efficient fast-track to knowledge. To fulfill this functional role, those who claim epistemic authority need to be both subjectively recognized (have a perceived advantage in knowledge) and objectively justified (have an actual advantage in knowledge). In a digital media context, new and unconventional knowledge sources have emerged that can fulfill the functional role of epistemic authorities. But false authorities that disseminate misinformation have emerged as well while other sources with important knowledge remain unrecognized. We further analyze the functional role of epistemic intermediaries that can mitigate such problematic developments by correcting false authorities and by providing endorsement for unrecognized authorities. We conclude with a research agenda to study functional forms of epistemic authorities and epistemic intermediaries in the digital public sphere.