Protonmail now supports bridging (IMAP, SMTP, and POP3), but to get the benefit of an encrypted email store I exclusively use their clients (mobile and web app)

Protonmail now supports bridging (IMAP, SMTP, and POP3), but to get the benefit of an encrypted email store I exclusively use their clients (mobile and web app). It's not a perfect interface, but I don't have many complaints. The old web interface was annoying so I've been using the beta. It seemed well polished at the time so I'm happy to see that they consider it ready for their entire customer base. I don't have experience with the protonmail's bridge, but so far I haven't experienced any outages or slow behavior. I use a custom domain and I think protonmail and fastmail are feature parity in this area. Protonmail just offers fewer domains and addresses at a given tier.