grommunio AlternativesMail Servers & Calendar Apps like grommunio

grommunio is described as '(formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration' and is a Mail Server in the office & productivity category. There are more than 10 alternatives to grommunio for a variety of platforms, including Web-based, Linux, Self-Hosted, SaaS and Windows apps. The best grommunio alternative is Nextcloud Hub, which is both free and Open Source. Other great apps like grommunio are Kolab, Zimbra Collaboration Suite, SOGo and Kopano.

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Alternatives list

  1. Nextcloud Hub icon

    Nextcloud Hub

     22 likes
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    Nextcloud is the most deployed on-premises file share and collaboration platform. Access & collaborate across your devices. As fully on-premises solution, Nextcloud Hub provides the benefits of online collaboration without the compliance and security risks.

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Self-Hosted
    • Nextcloud
    Nextcloud Hub screenshot 1
     

    • Nextcloud Hub is the most popular Self-Hosted alternative to grommunio.

    • Nextcloud Hub is the most popular Open Source & free alternative to grommunio.

    • Nextcloud Hub is Free and Open Sourcegrommunio is Freemium and Open Source
  2. Kolab icon

    Kolab

     43 likes
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    Kolab provides a FOSS communication & collaboration solution that can be completely self-hosted. Take back control of your data and access it via the webinterface, or existing mobile & desktop clients.

    Cost / License

    • Freemium (Subscription)
    • Open Source

    Application type

    Platforms

    • Linux
    • Online
    • Self-Hosted
     

    • Kolab is the most popular Web-based & Linux alternative to grommunio.

    • Kolab is Freemium and Open Sourcegrommunio is also Freemium and Open Source
  4. Zimbra Collaboration Suite icon

    Zimbra Collaboration Suite

     35 likes
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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 dramatically reduces TCO compared to legacy platform vendors.

    45 Zimbra Collaboration Suite alternatives

    Cost / License

    • Pay once
    • Proprietary

    Application types

    Platforms

    • Linux
    • Online
    • Self-Hosted
    Zimbra Collaboration Suite screenshot 1
     

    • Zimbra Collaboration Suite is the most popular commercial alternative to grommunio.

    • Zimbra Collaboration Suite is Paid and Proprietarygrommunio is Freemium and Open Source
  5. SOGo icon

    SOGo

     30 likes
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    SOGo is groupware server with a focus on scalability and open standards.

    SOGo provides a rich AJAX-based Web interface and supports multiple native clients through the use of standard protocols such as CalDAV, CardDAV and GroupDAV.Share your calendars, address books and mails in.

    61 SOGo alternatives

    Cost / License

    • Freemium (Subscription)
    • Open Source

    Application type

    Platforms

    • Linux
    • Online
    • Thunderbird
    • Cloudron
    SOGo screenshot 1
    SOGo screenshot 2
    SOGo screenshot 3
     
  6. Kopano icon

    Kopano

     32 likes
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    Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface.

    22 Kopano alternatives

    Cost / License

    • Subscription
    • Proprietary

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
    Kopano screenshot 1
     

    • Kopano is the most popular SaaS alternative to grommunio.

    • Kopano is Paid and Proprietarygrommunio is Freemium and Open Source
  7. Microsoft Exchange icon

    Microsoft Exchange

     17 likes
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    Exchange business-class email helps increase user productivity while protecting your data. Get it as a hosted service or run it on your servers.

    43 Microsoft Exchange alternatives

    Cost / License

    • Subscription
    • Proprietary

    Application type

    Platforms

    • Windows
    • Online
    • Self-Hosted
    • Microsoft Office 365
    Microsoft Exchange screenshot 1
     

    • Microsoft Exchange is the most popular Windows alternative to grommunio.

    • Microsoft Exchange is Paid and Proprietarygrommunio is Freemium and Open Source
  9. 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.

    78 Kolab Now alternatives

    Cost / License

    • Subscription
    • Open Source

    Application types

    Platforms

    • Online
    • Software as a Service (SaaS)
    • DAVx5
    Kolab Now email
     
  10. 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.

    41 Horde alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Online
    • Self-Hosted
    Horde screenshot 1
     
  11. Collabtive icon

    Collabtive

     21 likes
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    Collabtive is a cloud based groupware, easy to use and efficient for your projects.

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • MySQL Community Edition
    • Self-Hosted
    • PHP
    Dashboard for some project gives you an overview
     
  12. 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.

    20 OX App Suite alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    OX Portal
     
  13. 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.

    29 OpenChange alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Linux
     
  14. Kerio Connect icon

    Kerio Connect

     9 likes
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    Kerio Connect makes email, calendars, contacts and task management easy and affordable. With Kerio Connect, you have immediate, secure access to your communications anytime, anywhere, on any device - without complexity or expensive overhead.

    14 Kerio Connect alternatives

    Cost / License

    • Paid
    • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    Screenshot of the web-based admin panel
     

    • Kerio Connect is the most popular Mac alternative to grommunio.

    • Kerio Connect is Paid and Proprietarygrommunio is Freemium and Open Source
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