The best alternative to Zoom I've found that doesn't spy on you is…

 ·  Facebook — Archer T. Ships shared a link.  ·  Markdown source

https://bigbluebutton.org/
The best alternative to Zoom I've found that doesn't spy on you is Big Blue Button:

https://bigbluebutton.org/

It's open source (LGPL licensed), so you can install it on your own server or rely on a hosted service:

https://bigbluebutton.org/commercial-support/