If you're referring to group calls, there aren't any applications that meet the criteria unless you self-host. 1-to-1 there are plenty of options, like Riot/Ma

If you're referring to group calls, there aren't any applications that meet the criteria unless you self-host. 1-to-1 there are plenty of options, like Riot/Matrix. Even though plenty of Western governments have engaged in IP theft before, I'd trust most of them more than the CCP which engages in organized and systematic IP theft.