Open Source Zoho Mail Alternatives

    The best open source alternative to Zoho Mail is ProtonMail, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Zoho Mail and 18 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Zoho Mail are Tutanota (Freemium, Open Source), Disroot (Free, Open Source), FairEmail (Freemium, Open Source) and Posteo (Paid, Open Source).

    This page was last updated Oct 16, 2021

      • FreeOpen Source
      • Online
      • Self-Hosted
      Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server application intended for users who need a clean and simple web mail application, which is fast and easy to use.
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      • FreeOpen Source
      • Android
      • Android Tablet
      • PureOS (Purism)
      Librem Mail – end-to-end encrypted email used by nearly everybody already * Email client with support for IMAP and POP3 * Encrypt and sign your emails with OpenKeychain * Multiple accounts * Free and open-source software
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    1. Fripost – the Free Email Association. Fripost organize the people who want an alternative to "free" e-mail services where you are constantly under surveillance and personal data is handed over to third parties.
      No screenshots yet
    2. Sup is a console-based email client for people with a lot of email. It supports tagging, very fast full-text search, automatic contact- list management, custom code insertion via a hook system, and more.
      • FreeOpen Source
      • Mac
      • Windows
      • Linux
      Unofficial, free and open-source Google Inbox Desktop App. Built using electron, Inboxer includes a menu bar which is globalmenu compatible and works, and keyboard shortcuts.

      Discontinued

      Project archived. See https://github.com/denysdovhan/inboxer/issues/101



      • FreeOpen Source
      • Online
      NOCC is a webmail client written in PHP. It provides webmail access to IMAP and POP3 accounts.
      No screenshots yet
    3. AtMail is an open source webmail client written in PHP. We aim to provide a elegant Ajax webmail client for existing IMAP mailservers, with less bloat and a focus on an intuitive, simple user interface.

      Discontinued

      No longer supported.

    4. Afterlogic Aurora is an enterprise collaboration system for small and medium-sized business. Aurora provides collaboration of webmail, contacts, calendar, files and helpdesk modules.
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    Showing 18 of 18 alternatives