Talking not as a security researcher but as someone who has to work with large corporate IT departments none of the alternatives proposed in this thread will fl

Talking not as a security researcher but as someone who has to work with large corporate IT departments none of the alternatives proposed in this thread will fly. With corporate IT, it's either MS Teams because it's installed "by default" on enterprise workstations and managed at the O365 level, or Zoom or Cisco WebEx, all managed centrally by IT. In our experience with these services, Zoom has been more reliable, and the quality of service for video and audio has been generally better than the rest, specially Teams. At the end of the day, this is all that our enterprise users care about. When running calls across organisations, it invariably ends up as a zoom meeting since Teams is flaky for someone, or WebEx doesn't allow someone to share their desktop. Another significant but underrated factor is the non-tech and non-enterprise market. Friends and family in their seventies and eighties default to zoom for their weekly or monthly catch-up sessions and get-togethers because "it just works". My neighbour who's in her late seventies is an editor for a small news magazine for the community, and zoom is her choice to collaborate with others on their articles. People don't want to bother with security until there's a massive breach somewhere, or it affects their business, or it's mandated by legislation or certification requirements.