We performed a comparison between ProtonMail and Zimbra Collaboration based on real PeerSpot user reviews.
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ProtonMail is ranked 11th in Email Applications while Zimbra Collaboration is ranked 4th in Email Applications with 27 reviews. ProtonMail is rated 0.0, while Zimbra Collaboration is rated 8.0. On the other hand, the top reviewer of Zimbra Collaboration writes "Provides good email capability; lacking in security and performance". ProtonMail is most compared with Google Workspace, Microsoft Exchange Online, Microsoft Exchange and Zoho Mail, whereas Zimbra Collaboration is most compared with Microsoft Exchange, Open-Xchange, IceWarp, Google Workspace and Zoho Mail.
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