I can see a lot of what we call "cloud services" today being privatized in the future. Owning your data is catching on, and it's never been easier to host your own:

* cloud storage/calendar/contacts sync with the likes of Nextcloud,

* email server and webmail client with the likes of Mailpile,

* group/instant messaging with the likes of Mattermost,

etc.

https://privacytools.io is a good place to get started, albeit slightly more paranoid than most of us.