Online mediation had been spreading rapidly as a mode of practice, even before the entire profession shifted online during the COVID-19 era. In this chapter, Ebner and Rainey survey the development of online mediation within the wider context of the growth of Online Dispute Resolution (ODR). The chapter presents a snapshot of the field’s status quo with respect to stakeholders, modes of communication and the technology utilized, and addresses substantive and process issues in online mediation: mediation process models, stages and issues; practitioner skills; professional issues; ethics, and practitioner standards.