The Best 20 OBM Alternatives
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34 LikeKolab Community
Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.
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27 LikeZimbra Collaboration Suite
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.
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15 LikeMicrosoft Exchange Server
Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft Servers line of server products and is widely used by enterprises using Microsoft infrastructure solutions.
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14 LikeMicrosoft Office 365
office 365 is a subscription-based software services that licenses microsoft office products for on-premise or cloud-based use. for consumers, the service allows the use of https://alternativein .
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10 LikeOX Open-Xchange
Open-Xchange Server 6 is the most advanced Linux based Groupware solution f.
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7 LikeAtmail Email Server
Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows.
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7 Like
OpenChange
OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.
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7 LikeKerio Connect
Kerio Connect makes email, calendars, contacts and task management easy and affordable.
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7 Like
eGroupWare
Egroupware is a web based software for team collaboration, central data management and CRM: email client, online calendar, contact and task management, project and file management, trouble ticket system, synchronization.
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