Fastmail requires payment meaning it is very closely tied to your identity. Proton is one of the very very few who do not tie a new email account to your identity via phone number, payment info or alternative email (which requires phone, payment info etc..).
Even proton only provides webmail free - pop3/imap/smtp require payment. But that's still better than 99.99% of other webmail - everyone verifies via some method that ties to your personal info.
Fastmail requires payment meaning it is very closely tied to your identity. Proton is one of the very very few who do not tie a new email account to your identity via phone number, payment info or alternative email (which requires phone, payment info etc..).
Even proton only provides webmail free - pop3/imap/smtp require payment. But that's still better than 99.99% of other webmail - everyone verifies via some method that ties to your personal info.