In December 2019, the video-conferencing platform Zoom served a worldwide total of 10 million daily meeting participants, mainly long-distance pow-wows between business people or academics. Four months later, that figure had rocketed to 300 million. Now, friends, neighbours, families, school and university students, co-workers, yoga practitioners, political leaders and even authoritarian parish councillors have all turned to Microsoft Teams, Webex, Zoom and others to keep in touch, to continue learning or to carry on grafting from home. But at what cost?