Zoom does not allow free video calls with end-to-end encryption
Video calling company Zoom confirmed last week that it will not enable end-to-end encryption for toll-free calls, in part because it wants to allow law enforcement access to these calls if necessary.
Read more about this here: https: //www.theverge.com/2020/6/3/21279355/zoom-end-encryption-calls-fbi-police-free-users