I self-host NextCloud myself, which provides shareable calendars, contacts, drive space, photos and collab office suite. It doesn’t do email. For email, I have my own domain and point the MX records at whatever service I currently happen to be using.
Proton seems to be trying to do all of this, but I don’t want one org holding all that personal data of mine, even encrypted. The only people who need access to my NextCloud data are my family, which is much easier to manage than thousands of accounts.


Just so you know, turning all that off only limits SOME of the telemetry going back to Microsoft. You can’t turn it all off.