The opening paragraph cracked me up:<p>"Cypht is not your father's webmail. Unless you are one of my daughters, in which case it is your father's webmail. Cypht is like a news reader, but for E-mail."
I can't find any mention of PGP anywhere on the site. That it is supported, or in-development, or planned. Which is a shame, because there are good Webmail implementations out there with PGP support. Roundcube via plugins, Rainloop built in.
mmh. what about Security? If they download locally via imap all your email for all your accounts or there is something more. anyway it is nice to read on Security page "Oauth2 over IMAP/SMTP "