OBM AlternativesMail Servers & WebMail Providers like OBM

OBM is described as 'Free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices' and is a Mail Server in the office & productivity category. There are more than 10 alternatives to OBM for a variety of platforms, including Linux, Web-based, Self-Hosted, Windows and Mac apps. The best OBM alternative is Nextcloud Hub, which is both free and Open Source. Other great apps like OBM are Kolab, Zimbra Collaboration Suite, SOGo and Microsoft Exchange.

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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 OBM.

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

    • Nextcloud Hub is Free and Open SourceOBM is also Free and Open Source
    • Nextcloud Hub is Privacy focusedOBM is not according to our users
  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 OBM.

    • Kolab is Freemium and Open SourceOBM is Free 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 OBM.

    • Zimbra Collaboration Suite is Paid and ProprietaryOBM is Free 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. 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 OBM.

    • Microsoft Exchange is Paid and ProprietaryOBM is Free 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.

    78 Kolab Now alternatives

    Cost / License

    • Subscription
    • Open Source

    Application types

    Platforms

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

    • Kolab Now is the most popular SaaS alternative to OBM.

    • Kolab Now is Paid and Open SourceOBM is Free and Open Source
    • Kolab Now is Privacy focusedOBM is not according to our users
  9. 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.

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Online
    • Self-Hosted
    Horde screenshot 1
     
  10. 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.

    Cost / License

    • Freemium (Pay once)
    • Open Source

    Application type

    Platforms

    • Linux
    • BSD
    • Self-Hosted
    Main components and working process
     
  11. 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.

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    OX Portal
     
  12. 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.

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Linux
     
  13. 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.

    Cost / License

    • Subscription
    • Proprietary

    Application types

    Platforms

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

    • CrossBox is the most popular Android, iPhone, iPad & Android Tablet alternative to OBM.

    • CrossBox is Paid and ProprietaryOBM is Free and Open Source
  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 OBM.

    • Kerio Connect is Paid and ProprietaryOBM is Free and Open Source
12 of 20 OBM alternatives