Any EU/Swiss-based provider that takes their job seriously, really. Here’s a starting point.

Proton’s encryption has always been more a publicity stunt than anything. A service that’s really committed to privacy shows it in their values and the way they act, not with technological gimmicks.

All that Proton’s encryption has really accomplished is that their services are one step away from complete customer lock-in: if they discontinue their “bridge” connectors tomorrow and force you to use their website and mobile app, and you haven’t backed up your email elsewhere, you’re fucked.

Migrating your email service to another provider should normally take one hour, provided you use your own domain(s) and back up your mailboxes regularly over IMAP to your own storage. Then it’s just a matter of changing some DNS records and waiting for them to propagate.

So call me paranoid but I’ll never use a provider that doesn’t offer standard IMAP and SMTP access to the mailbox.