Zimbra Collaboration Suite Alternatives

Zimbra Collaboration Suite is described as 'Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors' and is a Mail Server in the office & productivity category. There are more than 25 alternatives to Zimbra Collaboration Suite for a variety of platforms, including Linux, Web-based, Windows, Self-Hosted and Mac apps. The best Zimbra Collaboration Suite alternative is Microsoft 365 Copilot, which is free. Other great apps like Zimbra Collaboration Suite are Roundcube, Google Workspace, Nextcloud Hub and mailcow: dockerized.

filter to find the best alternatives

Zimbra Collaboration Suite alternatives are mainly Mail Servers, but if you're looking for WebMail Providers or Calendar Apps you can filter on that. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Zimbra Collaboration Suite.
Zimbra Collaboration Suite iconZimbra Collaboration Suite
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Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and...

More about Zimbra Collaboration Suite
More about Zimbra Collaboration Suite
Zimbra Collaboration Suite alternatives page was last updated Feb 6, 2025
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  1. Horde icon

    Horde

     29 likes
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    Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards compliant components from the Horde Project.

    42 Horde alternatives

    License model

    • Free • Open Source

    Application type

    Platforms

    • Online
    • Self-Hosted
    Horde screenshot 1
    Discontinued

    The last release (5.2.22) was in September 2017.

    Horde Features

    1.  CalDAV Support

    Horde VS Zimbra Collaboration Suite

     
  2. Kolab Now icon

    Kolab Now

     42 likes
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    Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.

    License model

    Application types

    Country of Origin

    • CH flagSwitzerland

    Platforms

    • Online
    • Software as a Service (SaaS)
    • DAVx5
    Kolab Now email

    Properties

    1.  Privacy focused

    Features

    1.  Support for Aliases
    2.  Real time collaboration
    3.  End-to-End Encryption
    4.  CalDAV Support
    5.  WebDAV Sync
    6.  CardDAV Support

    Kolab Now VS Zimbra Collaboration Suite

     
  4. OX App Suite icon

    OX App Suite

     15 likes
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    The OX App Suite by Open-Xchange is web-based platform offering a suite of apps like an email client, calendar, contacts magement, cloud storage with synchronization and productivity apps for word processing, spreadsheets and presentations.

    License model

    • Free • Open Source

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    OX Portal

    OX App Suite Features

    1.  Real time collaboration
    2.  Cloud Sync
    3.  Calendar Integration
    4.  Personal Information Manager (PIM)
    5.  Group Mail
    6.  WebDAV Support
    7.  WebDAV Sync

    OX App Suite VS Zimbra Collaboration Suite

     
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    Infomaniak kSuite

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  6. iRedMail icon

    iRedMail

     20 likes
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    A fully fledged, free email server solution, an open source project (GPL v2).

    Use official binary packages from Linux/BSD distributions, with both i386 and x86_64 support.

    Easy, fast deployment in LESS THAN 1 MINUTE. View YouTube Video to check how easy it is.

    Works on both no.

    67 iRedMail alternatives

    License model

    • Freemium • Open Source

    Application type

    Platforms

    • Linux
    • BSD
    • Self-Hosted
    Main components and working process

    iRedMail VS Zimbra Collaboration Suite

     
  7. OpenChange icon

    OpenChange

     9 likes
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    OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.

    License model

    • Free • Open Source

    Application type

    Platforms

    • Linux
    Discontinued

    Last release is from 2015

    OpenChange Features

    1.  Exchange

    OpenChange VS Zimbra Collaboration Suite

     
  8. CrossBox icon

    CrossBox

     1 like
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    Real-time email, chat, audio/video calls & conferences, file-sharing, and contacts app with a modern and intuitive UI.

    License model

    Application types

    Country of Origin

    • BA flagBosnia & Herzegovina

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    View Mailbox (Dark mode)

    CrossBox Features

    1.  File Hosting

    CrossBox VS Zimbra Collaboration Suite

     
  10. Poste.io icon

    Poste.io

     3 likes
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    Full featured solution for your Email server. Native implementation of last anti-SPAM metods, webmail and easy administration included.

    19 Poste.io alternatives

    License model

    • Free Personal • Proprietary

    Application type

    Platforms

    • Linux
    Poste.io screenshot 1

    Poste.io Features

    1. Docker icon  Support for Docker

    Poste.io VS Zimbra Collaboration Suite

     

  11. Citadel

     7 likes
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    Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD. In order to modernize the Citadel platform for the Internet, the Citadel/UX developers added functionality such as shared calendars, instant...

    License model

    • Free • Open Source

    Application types

    Platforms

    • Linux
    • Online

    Citadel Features

    1.  Real time collaboration

    Citadel VS Zimbra Collaboration Suite

     
  12. IceWarp icon

    IceWarp

     10 likes
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    IceWarp integrates all communication & collaboration features in one unified solution. Available in cloud or for on-premises deployment, IceWarp is a great tool to share and exchange all information and ideas online, offline or via mobile devices.

    42 IceWarp alternatives

    License model

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

    • Windows
    • Linux
    • Online
    IceWarp screenshot 1

    Top IceWarp Features

    1.  Team discussion
    2.  Secure File Sharing
    3.  Real time collaboration
    4.  Unlimited team members
    5. Microsoft Outlook icon  Outlook integration
    6. Microsoft 365 Copilot icon  Compatible with Microsoft Office
    7.  Cloud based
    8.  Document Sharing
    9.  Voice Chat
    10.  Video Conferencing
    11.  Integrated File Sharing
    12.  Shared Calendar

    IceWarp VS Zimbra Collaboration Suite

     
  13. Blue-Mind icon

    Blue-Mind

     8 likes
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    Blue Mind is a complete solution of company messaging, calendars and collaborative work. It aims to enable you to work daily with comprehensive, useful, efficient and effective tools.

    License model

    Application types

    Platforms

    • Linux
    Webmail

    Blue-Mind Features

    1.  ActiveSync
    2.  Calendar Sync
    3.  Reduce mobile data usage
    4.  REST API

    Blue-Mind VS Zimbra Collaboration Suite

     
  14. OBM icon

    OBM

     4 likes
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    OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices.

    License model

    • Free • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    OBM screenshot 1
    Discontinued

    The GitHub repository has been archived and the last update was in 2017.

    OBM Features

    1.  Real time collaboration
    2.  CalDAV Support

    OBM VS Zimbra Collaboration Suite

     
  15. Sendmail icon

    Sendmail

     4 likes
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    Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.

    28 Sendmail alternatives

    License model

    • Free • Open Source

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Mac
    • Linux
    Main Page

    Sendmail Features

    1.  SMTP Support

    Sendmail VS Zimbra Collaboration Suite

     
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