On Friday, Canada-based independent research organisation Citizen Lab found that Chinese servers were being used to distribute encryption and decryption keys for video conferences on Zoom
Another media report claimed that Zoom doesn't use end-to-end encryption to protect calling data of its users
Once you've set up the Teams app in Slack, you'll be able to start a call by simply using the teams-call command
Zoom's core business was into engineering and procurement in US, Europe and to some extent in Africa