Proton, the privacy startup behind e2e encrypted ProtonMail, confirms passing 50M users End-to-end encrypted email provider ProtonMail has officially confirmed it’s passed 50 million users globally as it turns seven years old. It’s a notable milestone for a services provider that intentionally does not have a data business — opting instead for a privacy pledge based on zero access architecture that means it has no way to decrypt the contents of ProtonMail users’ emails. Although, to be clear, the 50M+ figure applies to total users of all its products (which includes a VPN offering), not just users of its e2e encrypted email. (It declined to break out email users vs other products when we asked.)