ProtonMail is the world‘s largest encrypted email provider, with over 11 million users trusting us to secure their data every day. We are the email service of choice for security-conscious enterprises.
ProtonMail is ranked 13th in Email Applications while Zarafa is ranked 12th in Email Applications. ProtonMail is rated 0.0, while Zarafa is rated 0.0. On the other hand, ProtonMail is most compared with G Suite Enterprise, Microsoft Exchange Online and Microsoft Exchange, whereas Zarafa is most compared with Open-Xchange and Zimbra Collaboration.
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