Personally, I would not trust anyone (e.g. ProtonMail) more than Google.
If you have sensitive things in your emails, host your own mail, use GPG encryption or a one-time pad, or even avoid electronic networked machines altogether (depending on the level of security that you require).
Switzerland-hosted services are no safer than others, recall that Crypto AG, who promised to sell secure encryption machines, were just a cover by foreign intelligence services (jointly US/DE-owned/operated by the CIA & BND).
This is such a myopic view of the situation. Are you going to only exchange emails with people you host as well? Otherwise, anyone you exchange emails with will go through other email providers.
If you have sensitive things in your emails, host your own mail, use GPG encryption or a one-time pad, or even avoid electronic networked machines altogether (depending on the level of security that you require).
Switzerland-hosted services are no safer than others, recall that Crypto AG, who promised to sell secure encryption machines, were just a cover by foreign intelligence services (jointly US/DE-owned/operated by the CIA & BND).