I have posted this list before, but it seems to be more and more relevant every day! We don't have to use Google. There are tons of great open source projects available! Here are some of the apps that I self-host and use pretty much daily:

* Drive/Calendar/Photos/Keep:

  - https://nextcloud.com/

* Docs/Sheets/Slides

  - https://www.onlyoffice.com/

* Mail

  - https://mailu.io/ (basically a Docker-based deployment of Postfix/Dovecot/etc)

* Hangouts

  - Server - https://matrix.org/

  - Client - https://element.io/

* G+/Twitter

  - https://joinmastodon.org/

* Youtube Music

  - https://funkwhale.audio/