Last month I switched from Google Workspace to proton.me for hosting email for my domains.
It went smoothly, but if you're considering it, here's some things I wish I'd known when I was starting to move my old email.
https://unixorn.github.io/post/2025-12-26-advice-for-switching-to-proton-hosted-email/
TL;DR Proton is focused on privacy and cheaper than Google Workspace. And you get a VPN too. And they're a non-profit, so you don't have to worry about them selling your data later to prop up their stock price.