This paper examines space technology transfers and their commercialisation, focussing on transfers from publicly funded space programmes to different sectors of the economy. It notably compares practices from Europe, North America and Asia for the first time. It identifies the conditions for enabling successful space technology transfers, as well as the most common channels for commercialisation. The paper also reviews methodological issues in measuring and assessing the benefits of transfers, and provides recommendations to develop improved and internationally comparable evidence. The analysis benefits from original content and endorsement from some of the most active space agencies in OECD countries and beyond.