Jitsi Meet Instances by Framasoft
3 out of 5 stars (based on 1 review)
Jitsi is a collection of free and open-source multiplatform voice (VoIP), videoconferencing and instant messaging applications for the web platform, Windows, Linux, macOS, iOS and Android.
They do not filter out the trade-based instances so you might find some instances that either collect some data or insert some ads into your face. But, from my tests, this is rare.