Proton is the best known privacy brand in Europe, run by Proton AG in Geneva and now owned by a Swiss non-profit foundation. Proton began in 2014 as an encrypted email service built by scientists who met at CERN, and it has grown into a full suite covering Mail, Calendar, Drive, Docs and Sheets, with VPN and a password manager included in the same account.
Everything is protected by Swiss privacy law and end-to-end encryption, and there is a free tier so you can try it before paying. For an individual or a small team leaving Gmail, it is the easiest move to make without giving up a polished, familiar experience.