Alternatives to Zimbra Collaboration Suite for all platforms with any license

Platforms

Mobile

Web / Online

Development

Indie / Classic

Show 12 hidden platforms
  • Roundcube icon

    Roundcube

    Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message...

    Open Source Self-Hosted PHP

  • G Suite icon

    G Suite

    G Suite (formerly Google Apps for Work) is Google's encompassing selection of cloud apps for business, including customizable products under custom domain names. It features traditional office tools through Google Docs as well as...

    Commercial Mac Windows Linux Web / Cloud Chrome OS

  • Kolab Community icon

    Kolab Community

    Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.

    Open Source Linux Web / Cloud Self-Hosted

  • Horde icon

    Horde

    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.

    Open Source Web / Cloud

  • Kolab Now icon

    Kolab Now

    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.

    Commercial Web / Cloud DAVdroid

  • Microsoft Office 365 icon

    Microsoft 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 Microsoft Office Suite...

    Commercial Web / Cloud

  • OX Open-Xchange icon

    OX Open-Xchange

    Open-Xchange Server 6 is the most advanced Linux based Groupware solution f. Open-Xchange Server 6 is superior in the following areas: • Open-Xchange Server 6 offers most comprehensive Groupware functionality based on modern user...

    Open Source Linux Web / Cloud

  • Microsoft Exchange Server icon

    Microsoft 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...

    Commercial Windows Web / Cloud

  • iRedMail icon

    iRedMail

    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...

    Open Source Linux BSD Self-Hosted

  • mailcow icon

    mailcow

    mailcow is a mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration.

    Open Source Linux

  • Zarafa icon

    Zarafa

    Open Source Collaboration, providing integration with your existing Linux mailserver, native mobile phone support, Outlook "Look & Feel" webaccess and stable Outlook sharing (100% MAPI).

    Commercial Mac Windows Linux Web / Cloud

  • OpenChange icon

    OpenChange

    OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols. Exchange is a groupware server designed to work with Microsoft Outlook, and providing features such as a...

    Open Source Linux

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  • Atmail Email Server icon

    Atmail Email Server

    Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows. Features: Webmail Calendar Addressbook IMAP, POP or Exchange WebSync SMTP/POP3/IMAP server Explore the...

    Commercial Linux Web / Cloud

  • Sendmail icon

    Sendmail

    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. A descendant...

    Open Source Mac Linux

  • Poste.io icon

    Poste.io

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

    Free Personal Linux

  • Blue-Mind icon

    Blue-Mind

    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.

    Open Source Linux

  • eGroupWare icon

    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.

    Open Source Linux Web / Cloud

  • OBM icon

    OBM

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

    Open Source Mac Windows Linux

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  • Expanding Communication icon

    Expanding Communication

    Turnkey Solutions for the Enterprise Cloud Installation, Configuration, and Management tools for enterprise email, collaboration, messaging, video conferencing, file sharing, and file transfers.

    Commercial Linux

  • atmail icon

    atmail

    Atmail allows you to choose between on-premises or cloud deployment. Features include email, contact, calendar, task, storage, synchronisation and provisioning. It's extensible through a RESTful API and allows easy rebranding...

    Commercial Mac Windows Linux Android iPhone Android Tablet iPad

  • Axigen Mail Server, Calendaring & Collaboration icon

    Axigen Mail Server, Calendaring & Collaboration

    Axigen is an integrated, full featured, all-in-onem email, calendaring and collaboration platform, based on an innovative, proprietary technology, providing unmatched manageability for system administrators.

    Freemium Windows Linux BSD Self-Hosted Microsoft Office Outlook

  • Citadel

    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...

    Open Source Linux Web / Cloud

  • Contactoffice icon

    Contactoffice

    Virtual Office, Online Office, Digital Learning Space, Online Groupware - ContactOffice, Keep a virtual office on the web. Share documents, contacts, calendar, tasks, ... with clients, students, suppliers, friends or family.

    Freemium Web / Cloud

  • PowerMTA icon

    PowerMTA

    Email gateway application (SMTP server) that makes it easy for senders to adopt the latest authentication specifications ( SPF and DKIM) to comply with changing ISP policies for accountable outbound email delivery. No over hype. It...

    Commercial Windows Linux Self-Hosted

  • Kerio Connect icon

    Kerio Connect

    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...

    Commercial Mac Windows Linux Web / Cloud

  • Alinto

    Established in January 2000, Alinto is one othe principal french editors and operators of collaborative messaging and unified communications. Alinto manages over 4000 areas of professional messaging and more than a million users in 5...

    Commercial Web / Cloud

  • HyperOffice Email Service icon

    HyperOffice Email Service

    HyperOffices is a Microsoft Exchange alternative with all the messaging features growing business need - custom business email; Outlook email; shared Outlook contacts, calendars and tasks; web and mobile email; Outlook...

    Commercial Web / Cloud

  • iMail icon

    iMail

    Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows server and database server required, unlimited mail accounts, storage, attachment size, custom logo. Free for...

    Free Windows Self-Hosted

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