#Zoom:
https://arstechnica.com/tech-policy/2020/11/zoom-lied-to-users-about-end-to-end-encryption-for-years-ftc-says/

I'm not in the least surprised.
Think of other popular messaging systems that claim to offer some kind of E2EE, but are proprietary #software: WhatsApp, Skype, FB Messenger, Viber, Threema, Line…
Distrust by default!
I am always amazed when folks even consider the alleged support for strong #encryption in those apps… the value of those claims is exactly zero.