What are some alternatives?
When comparing ProtonMail and Criptext, you can also consider the following products
Zoho Mail - Zoho Mail is a webmail service built with the needs of a modern business in mind.
Tutanota - Get your encrypted mailbox for free.
FastMail - Email, calendars, and contacts to highest standards of security, privacy and reliability.
Gmail - Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.
Tildamail - Tilda is private and secure email with decentalized storage.
MsgSafe.io - MsgSafe.io provides private, encrypted, online communication with layers of security you can trust.