Try ctemplar.com I’ve read many reviews that prefer it over protonmail. I’ve got both types of accounts. The big difference with ctemplar is that they do not retain the subject line of any emails, which protonmail does. As such ctemplar offers some extra protection if anyone comes snooping. I’m also going to open an email account at brax.me, which becomes available tomorrow. It’s also fully encrypted, although there are far fewer details there about the accounts.