Purpose Significant changes to in-person volunteering were necessary during the COVID-19 pandemic. Health Volunteers Overseas (HVO) responded to the pandemic by developing an online education platform and pivoting to online volunteering. This qualitative study explores the dynamics of online volunteering and provides visibility to this novel trend in the training of health professionals in resource-scarce countries. Methodology/approach Barriers and facilitators, actual and potential outcomes, and recommendations for online volunteering were addressed through a comparative case study approach focusing on three HVO global projects: physical therapy in Rwanda and Ghana, oral health in Nepal, and anesthesiology—a multi-country collaboration between Bhutan, Cambodia, and Laos. Findings A total of 15 participants, including project directors, host country representatives, and teaching volunteers, were interviewed online. Three themes emerged through the online interviews with HVO volunteers, project directors, and host country directors: Creating Space, the Future is Hybrid, and Geographical Expansion. Research implications Online volunteering provides a new opportunity for volunteers to expand their networks, learn new skills, and meet the needs of the host country participants. There is also an opportunity to expand projects beyond national boundaries, but logistical, cultural, and linguistic challenges must be considered. Practical implications Online volunteering is a feasible approach for building teaching and research capacity globally, and volunteer agencies should consider a hybrid model combining online volunteering with in-person volunteering. Originality Online volunteering provides support to meet the needs of both volunteers and in-country program participants. Limitations This study focused on the volunteer, project director, and host coordinator experience and not on the learner. More research is needed to investigate how online and in-person dynamics coalesce.