Dialectical behaviour therapy (DBT) is an effective treatment for borderline personality disorder and other problems underpinned by difficulties with emotional regulation. The main components of DBT are skills training groups and individual therapy. The COVID-19 outbreak forced a rapid adaptation to online delivery, which largely mirrored face-to-face programmes using videoconferencing technology. This study aimed to elicit and describe the experiences and learning of therapists involved in providing high-fidelity DBT programmes via the Australian DBT Institute, which established an online delivery platform called DBT AssistTM prior to the COVID-19 pandemic. The report conforms with the consolidated criteria for reporting qualitative research (COREQ). Seven therapists were interviewed. Data were transcribed and analysed thematically. Delivering skills training online, either exclusively or in hybrid form (with face-to-face individual therapy), was acceptable and even preferable to therapists and clients. It was considered safe, the programme was associated with few non-completers, and it improved the accessibility of DBT to those who might otherwise not be able to engage in a face-to-face programme. Skills training utilized a ‘flipped-learning’ approach which improved the efficiency of online delivery. Other unique and helpful features of the online programme were described. The best outcomes associated with online DBT are likely to be achieved through careful adaptation to the online environment in accord with the principles of DBT rather than mirroring face-to-face processes. Further research is required to determine the efficacy of online therapy relative to faceto-face, and who might be best suited to different modes of delivery.