You could just uncheck one option

https://youtu.be/pG0yq2ATWbc

Host yourselves

https://jitsi.org/

Beware, one might be voted down for warning others.

Tutanota deletes accounts for inactivity. You’d think using their official app wouldn’t cause account closure, but from own experience I can attest they don’t want free users ever. Your account will be blocked and you will have to create another one to pay them for the old adress. Fuck Tutanota

Basically drop „don’t be evil“, split to Alphabet, wait a few years, be evil