A huge and excellent list of google alternatives:

If anyone has more feel free to add!

@mpanhans How about BigBlueButton for Classrooms?
Also, not an addition but it's interesting that Telegram is considered insecure...
Sign in to participate in the conversation
Librem Social

Librem Social is an opt-in public network. Messages are shared under Creative Commons BY-SA 4.0 license terms. Policy.

Stay safe. Please abide by our code of conduct.

(Source code)

image/svg+xml Librem Chat image/svg+xml