[NoboruWataya]

I don't use Proton but don't they offer a calendar and file storage? I know a lot of email providers do (I use mailbox.org and they do). Personally I host Nextcloud on a VPS and use that for file storage, calendar and photos.

Maps is a tough one. It's probably the main Google service I still use (YouTube being another one). There is OSM of course but it can't compete with Google on features.

[protonmail]

Indeed, we do offer both: https://proton.me/calendar and https://proton.me/drive.

[datadrivenangel]

Fastmail's hosted calendar is good, and the file storage allows for file storage. Happy customer here.