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 Community, Zimbra Collaboration Suite, Microsoft Exchange and Kopano.

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grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and...

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grommunio alternatives page was last updated Dec 11, 2023
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  1. Nextcloud Hub icon

    Nextcloud Hub

     21 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.

    51 Nextcloud Hub alternatives

    License model

    • Free • Open Source

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Self-Hosted
    Nextcloud Hub screenshot 1

    Properties

    1.  Privacy focused

    Features

    1.  Ad-free
    2.  Real time collaboration
    3.  Extensible by Plugins/Extensions
    4.  Cloud Sync
    5.  Photo Gallery

    Nextcloud Hub VS grommunio

     

    • 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
    • Nextcloud Hub is Privacy focusedgrommunio is not according to our users
  2. Kolab Community icon

    Kolab Community

     41 likes
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    Kolab is entirely Free and Open Source Software (a.k.a. FOSS), and uses Open Standards. We’ll get to why this is important to us, and hope that it is important to you thereafter.

    47 Kolab Community alternatives

    License model

    • Freemium • Open Source

    Application types

    Country of Origin

    • CH flagSwitzerland

    Platforms

    • Linux
    • Online
    • Self-Hosted

    Kolab Community Features

    1.  Real time collaboration
    2.  Video Conferencing
    3.  Contacts
    4.  Voice Chat
    5.  CardDAV Support
    6.  IMAP Support
    7.  CalDAV Support
    8.  WebDAV Support

    Kolab Community VS grommunio

     

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

    • Kolab Community 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.

    44 Zimbra Collaboration Suite alternatives

    License model

    • Freemium • Open Source

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

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

    Zimbra Collaboration Suite Features

    1.  Real time collaboration
    2.  ActiveSync
    3. Microsoft Active Directory icon  Active Directory integration

    Zimbra Collaboration Suite VS grommunio

     
  5. 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

    License model

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

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

    Microsoft Exchange Features

    1.  Real time collaboration

    Microsoft Exchange VS grommunio

     

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

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

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

    Kopano

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

    22 Kopano alternatives

    License model

    Application types

    Country of Origin

    • NL flagNetherlands
    • European Union flagEU

    Platforms

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

    Kopano Features

    1.  Real time collaboration
    2.  On-premises software
    3.  Shared Calendar
    4.  CalDAV Support
    5.  IMAP Support
    6.  S/MIME Support
    7.  POP3 Support

    Kopano VS grommunio

     

    • Kopano is the most popular SaaS alternative to grommunio.

    • Kopano is Paid and Proprietarygrommunio is Freemium and Open Source
  7. 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 grommunio

     
  9. 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 grommunio

     
  10. 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 grommunio

     
  11. Kerio Connect icon

    Kerio Connect

     8 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

    License model

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

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

    Kerio Connect Features

    1. XMPP icon  Supports XMPP
    2.  Sync Contacts
    3.  POP3 Support
    4.  Calendar Sync

    Kerio Connect VS grommunio

     

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

    • Kerio Connect is Paid and Proprietarygrommunio is Freemium and Open Source
  12. EGroupware icon

    EGroupware

     8 likes
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    Online Collaboration with Chat and Online Office. Is developed as open source software in Germany, offered as free community version and as commercial version. Operation as self-hosted or as SaaS from the computer centre.

    License model

    • Freemium • Open Source

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    EGroupware on the desktop --- EGroupware offers with the modules - E-mail - Calendar - Address book - InfoLog (tasks, notes, ...) - File manager - Ticket system - Project Manager - Timesheet - Collabora Online Office - Rocket.Chat an entire office in the browser.

    EGroupware Features

    1.  Real time collaboration
    2.  Kanban Board
    3.  Document Sharing
    4.  Remote Work
    5.  Web-Based
    6.  CalDAV Support
    7.  RDP
    8.  WebDAV Support
    9.  CardDAV Support
    10.  Calendar Sync

    EGroupware VS grommunio

     
  13. Atmail Email Server icon

    Atmail Email Server

     7 likes
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    Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows.

    License model

    Application types

    Country of Origin

    • AU flagAustralia

    Platforms

    • Linux
    • Online
    Intuitive Webmail Interface

    Atmail Email Server Features

    1.  Group Mail

    Atmail Email Server VS grommunio

     
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