# List of collaborative software

This list is divided into proprietary or free software, and open source software, with several comparison tables of different product and vendor characteristics. It also includes a section of project collaboration software, which is a standard feature in collaboration platforms.

## General

Systems listed on a light purple background are no longer in active development.

### General Information

| Name | Creator | Latest stable release | Stable release date | First public release date | Database backend | License | Software product available | SaaS available |
| Adobe LiveCycle | Adobe | 9 | 2010 | | Filesystem | Proprietary | Yes | No |
| Alfresco | Alfresco Software | 23.4 | 2024-11-22 | 2005 | MariaDB, MySQL, Oracle, PostgreSQL, SQL Server | LGPL | Yes | Yes |
| Altova MetaTeam | Altova GmbH | 2013 | 2012 | 2010 | Cloud | Proprietary | No | Yes |
| Assembla | Assembla | Continuous Delivery | 2013 | 2006 | | Proprietary | Yes | Yes |
| Collaborate | HighQ | 4.4 | 2018 | 2001 | | Proprietary | No | Yes |
| Collabora Online | Collabora | 24.04.12.4 | 2025-02-21 | 2016 | n/a as integrates with storage providers | MPLv2 | Yes | Yes |
| ConceptDraw Office | CS Odessa | 4.4 | 2018-04-17 | 2008 | | Proprietary | Yes | Yes |
| Confluence | Atlassian | 8.5.2 | 4 October 2023; 17 months ago (4 October 2023) | 2004 | | Proprietary | Yes | Yes |
| Drupal | Drupal | 11.1.1 | 6 January 2025; 59 days ago | 2001 | MariaDB, Microsoft SQL Server, MySQL, Percona Server, PostgreSQL, SQLite | GPL 2, 3 | Yes | Yes |
| EGroupware | EGroupware | 16.1 | 2021 | 2003 | MariaDB, MySql, PostgreSQL | GPLv2 | Yes | Yes |
| Easy Redmine | Easy Software | 13.3.0 | October 2023 | 2007 | MySQL database (Percona) | Proprietary Software based on Redmine | Yes | Yes |
| EMC Documentum eRoom | EMC | 7.4.4 | 2012 | 2003 | Filesystem | Proprietary | Yes | No |
| Google Drive | Google | | | | Cloud | Proprietary | No | Yes |
| HumHub | HumHub GmbH & Co. KG | 1.17.0 | 2025-01-13; 52 days ago | 2014 | MariaDB, MySQL | AGPL | Yes | Yes |
| IBM Connections Suite | IBM | 6 CR5 | 2019-05-30 | June 27, 2007 | IBM Db2 | Proprietary | Yes | Yes |
| IBM Domino | IBM | 8.5.2 | 2010-08-24 | December 1996 | | Proprietary | Yes | Yes |
| IBM Notes | IBM | | | | | Proprietary | Yes | Yes |
| IBM Sametime | IBM | | | | | Proprietary | Yes | Yes |
| ICEFLO | Agenor Technology | v 3.15.0 | | 2009 | IBM SoftLayer | Proprietary | Yes | Yes |
| IceWarp Mail Server | IceWarp | 12.1.1 | 2018-10-30 | 1998 | | Proprietary | Yes | Yes |
| InLoox | InLoox, Inc. | 10.2.8 | 2021-03-29 | 1999 | Microsoft SQL Server | Proprietary | Yes | Yes |
| Jive | Jive Software | 9.0.7.1 | 2019-03-20 | 2006 | Oracle, MS SQL, Db2, mySQL, Postgres | Proprietary | | |
| Kolab | The Kolab-Project and Kolab Systems AG | 3.3 | 2014-08-20 | July 17, 2003 | IMAP(File/mail)-based | various Free Software licenses | Yes | Yes |
| Kune | Comunes Collective | 1.0.0 | 2015-03-18 | July 17, 2003 | | AGPL | Yes | Yes |
| LibreOffice Online | The Document Foundation | 6.13 | 2018 | 2017 | | MPL 2.0 | Yes | No |
| LogicalDOC | Logical Objects | Community Edition 8.7.3 | 2022-02-08 | 2006 | | LGPL | Yes | Yes |
| Microsoft Exchange Server | Microsoft | 2016 | 2011-08-04 | 2007 | Exchange DB | Proprietary | Yes | Yes |
| Microsoft Live Meeting | Microsoft | 2007 | 2007 | 1997 | | Proprietary | Yes | Yes |
| Microsoft Lync Server | Microsoft | 2010 | 2010 | November 2000 | SQL Server or SQL EE | Proprietary | Yes | Yes |
| Microsoft Office | Microsoft | 2016 | 2016 | 1990 | | Proprietary | Yes | Yes |
| Microsoft Project Server | Microsoft | 2010 | 2010-06-15 | 2000 | | Proprietary | Yes | Yes |
| Microsoft SharePoint Foundation | Microsoft | 2019 | 2018-10-22 | 2001 | SQL Server or SQL EE | Proprietary | Yes | No |
| Microsoft SharePoint Server | Microsoft | 2019 | 2018-10-22 | 2001 | SQL Server or SQL EE | Proprietary | Yes | Yes |
| Microsoft SharePoint Workspace | Microsoft | 2019 | 2018-10-22 | 2007 | | Proprietary | Yes | No |
| Microsoft Team Foundation Server | Microsoft | 2015 | 2015 | 1994 | SQL Server or SQL EE | Proprietary | Yes | No |
| Microsoft Windows Live | Microsoft | 2011 | 2010-09 | November 1, 2005 | Cloud | Proprietary | No | Yes |
| Nefsis | Nefsis | 3.72 | 2011-01-07 | 1998 | Cloud | Proprietary | Yes | Yes |
| Nextcloud | Nextcloud | 31.0.0 | 2025-02-24; 10 days ago | 2016 | MariaDB, MySQL, Oracle, PostgreSQL, SQLite | AGPLv3+ | Yes | Yes |
| Notion | Notion Labs Inc. | | | 2016 | | Proprietary | Yes | Yes |
| Oracle WebCenter | Oracle | 11g | 2009-07 | | | Proprietary | | |
| Redmine | | | | 2006 | Multpiple | GPLv2 | Yes | Yes |
| SAP NetWeaver Portal | SAP | | | 2004 | | Proprietary | | |
| Tiki Wiki CMS Groupware | Tiki Software Community Association | 27.1 | 2024-11-23; 3 months ago | October 2002 | MariaDB, MySQL | LGPL | Yes | No |
| TrackerSuite.Net | Automation Centre | 3.6 | 2010-11 | 2006 | SQL Server | Proprietary | Yes | Yes |
| Traction TeamPage | Traction Software | 6.2 (76) | 2025-01-29 | December 1, 1999 | NoSQL Journal, MySQL | Proprietary | Yes | Yes |
| Wrike | Wrike | 2013 | 2007 | 2006 | PostgreSQL | Proprietary | No | Yes |
| WPS Office | Kingsoft | 2019 | 2019-05-06 | 1988 | SQL Server or SQL EE | Proprietary | Yes | Yes |
| XWiki | XWiki | 17.1.0 | 2025-02-25 | May 22, 2007 | HSQLDB, MariaDB, MySQL, PostgreSQL, Oracle | LGPL | Yes | Yes |
| Xaitporter | Xait | 2014 | 2002 | 2001 | Oracle | Proprietary | No | Yes |
| Zoho Projects | Zoho | 5.0 | 2015-01-20 | August 26, 2006 | MySQL | Proprietary | No | Yes |
| Name | Creator | Latest stable release | Stable release date | First public release date | Database backend | License | Software product available | SaaS available |

### Comparison of unified communications features

| Name | E-mail server | Faxing | Instant messaging | Telephony | Videoconferencing | Web conferencing | Data conferencing | Application sharing | Electronic meeting system | Synchronous conferencing |
| IBM Sametime | No, integrated with Lotus Domino | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| IBM Lotus Domino | Yes | Yes | Yes with integrated Sametime | Yes with integrated Sametime | Yes with integrated Sametime | Yes with integrated Sametime | No | Yes with integrated Sametime | Yes with integrated Sametime | No |
| IceWarp Mail Server | Yes | No | Yes | Yes | Yes | Yes | No | No | No | Yes |
| Microsoft Exchange Server | Yes | Yes | No | No | No | No | No | No | Yes | No |
| Microsoft Lync Server | No, integrated with Exchange Server | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Microsoft SharePoint | No, integrated with Exchange Server | No | No | No | No | No | No | No | Yes | No |
| Nextcloud | Yes | Yes, email to VOIP | Yes | Yes | Yes | Yes | Yes collaborative editing with integrated video conferencing | Yes | Yes | Yes |
| Name | E-mail server | Faxing | Instant messaging | Telephony | Videoconferencing | Web conferencing | Data conferencing | Application sharing | Electronic meeting system | Synchronous conferencing |

### Comparison of collaborative software features

| Name | Wikis | Web publishing | Calendaring software | Project management | Workflow system | Document management | List management | XML Forms management and workflow | Discussion | Blogs | Surveys | Time tracking | Business intelligence | Charting | Bookmarking, Tagging, Rating and Comments | Social software | Enterprise search | Office suite |
| Easy Redmine | Yes | Yes | Yes | Yes | Yes | Yes | No | No | Yes | No | No | Yes | No | Yes | Yes | Yes | Yes | No |
| EGroupware | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | No | No | Yes | Yes | Yes | Yes | No | Yes | Yes, web, webdav |
| Google Workspace | Yes, Sites | Yes, Sites | Yes | No | No | Yes, simple | No | Yes, simple | Yes | Yes | Yes | No | No | Yes | Yes | Yes | Yes | Yes |
| IBM Connections | Yes | Yes | Yes | Yes, simple | Yes | Yes, simple | No | No | Yes | Yes | No | No | No | No | Yes | Yes | No | No |
| IBM Lotus Domino | No | No | Yes | Yes, simple | Yes | No | No | No | No | No | No | No | No | No | No | No | No | No |
| IceWarp Mail Server | No | No | Yes | Yes, simple | Yes | Yes | No | No | Yes | No | No | No | No | No | Yes | Yes | No | Yes |
| InLoox | No | No | Yes | Yes | Yes | Yes | Yes | No | Yes | No | No | Yes | Yes | Yes | Yes, limited | Yes | Yes | Yes, MS Office Interface |
| Jive Software | Yes | Yes | Yes | Yes, simple | No | Yes | No | No | Yes | Yes | Yes | No | No | Yes | Yes | Yes | Yes | Yes, MS Office Interface |
| Kune | Yes | In development | Yes | Yes, simple | No | Yes | yes, wave-based | No | Yes | Yes | yes (gadget) | No | No | No | In development | Yes | No | Real-time collaborative documents |
| Microsoft Exchange Server | No | No | Yes | Yes, simple | Yes | No | No | No | No | No | No | No | No | No | No | No | No | No |
| Microsoft Office | No | No | No | No | No | Yes, simple | No | Yes | No | No | No | No | No | Yes | No | No | No | Yes, desktop |
| Microsoft Project Server | No | No | Yes | Yes | No | No | No | No | No | No | No | Yes | No | No | No | No | No | No |
| Microsoft Sharepoint | Yes | Yes | Yes | Yes, simple | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes, web |
| Microsoft Team Foundation Server | No | No | Yes | Yes | Yes | Yes | No | No | Yes | No | No | Yes | No | Yes | Yes | No | Yes | No |
| Nextcloud | No | Yes | Yes | Yes | Yes, limited | No | No | No | Yes | No | Yes | Yes | Yes, limited | Yes | Yes, limited | Yes | Yes, limited | Yes |
| Smartsheet | No | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | No | Yes | Yes | No | Yes | No | No | Yes | Yes, MS Office Interface |
| Traction TeamPage | Yes | Yes | Yes | Yes | Yes, simple | Yes | Yes | No | Yes | Yes | Yes, plug-in | Yes, basic | No | Yes, usage charts, API | Yes | Yes, plug-in | Yes | Yes, web, webdav |
| Tiki Wiki CMS Groupware | Yes | Yes | Yes | Yes, simple | Yes | Yes | Yes (newsletter) | Yes | Yes | Yes | Yes | Yes | No | Yes (basic) | Yes | Yes | Yes | Yes, web |
| Wrike | No | No | Yes | Yes | Yes | Yes | No | No | Yes | No | No | Yes | No | Yes | Yes | Yes | No | Yes, web |
| Xaitporter | No | No | Yes, limited | Yes | Yes | Yes | No | No | Yes | No | No | Yes | Yes | Yes | Yes | Yes | No | Yes, webdav |
| Trello | No | No | Yes, limited | Yes | Yes | No | No | No | Yes | No | Yes | Yes | No | No | Yes | Yes | No | No |
| XWiki Enterprise | Yes | Yes | Yes, extension | Yes, extension | Yes, extension | Yes, extension | Yes, extension | Yes, extension | Yes, extension | Yes | Yes, extension | No | No | Yes, extension | Yes, and extension for rating | Yes | Yes, (Lucene/SolR) | Yes, web |
| Zoho Projects | Yes | No | Yes | Yes | Yes, limited | Yes | No | No | Yes | No | No | Yes | No | Yes | Yes, limited | Yes | No | Yes, web |
| Name | Wikis | Web publishing | Calendaring software | Project management | Workflow system | Document management | List management | XML Forms management and workflow | Discussion | Blogs | Surveys | Time tracking | Business intelligence | Charting | Bookmarking, Tagging, Rating and Comments | Social software | Enterprise search | Office suite |

### Comparison of targets

| Name | Public | Intranet | Extranet | Personal Sites | Team Sites | Developer |
| IBM Connections | Yes | Yes | Yes | Yes | Yes | Yes |
| IBM Lotus Domino | Yes | Yes | Yes | Yes | Yes | Yes |
| IBM Lotus QuickPlace | Yes | Yes | Yes | Yes | Yes | Yes |
| Microsoft Exchange Server | Yes | Yes | Yes | No | No | No |
| Microsoft Office Live Communications Server | No | Yes | Yes | Yes | Yes | No |
| Microsoft Sharepoint | Yes | Yes | Yes | Yes | Yes | Yes |
| Microsoft Team Foundation Server | No | Yes | Yes | Yes | Yes | Yes |
| Nextcloud | Yes | Yes | Yes | Yes | Yes | Yes |
| Name | Public | Intranet | Extranet | Personal Sites | Team Sites | Developer |

## Open source software

The following are open source applications for collaboration:

### Standard client–server software

* Access Grid, for audio and video-based collaboration
* Axigen
* Citadel/UX, with support for native groupware clients (Kontact, Novell Evolution, Microsoft Outlook) and web interface
* Cyn.in
* EGroupware, with support for native groupware clients (Kontact, Novell Evolution, Microsoft Outlook) and web interface
* Group-Office groupware and CRM
* Kolab, various native PIM clients
* Kopano
* OpenGroupware.org
* phpGroupWare
* Scalix
* SOGo, integrated email, calendaring with Apple iCal, Mozilla Thunderbird and native Outlook compatibility
* Teambox, Basecamp-style project management software with focus on GTD task management and conversations. (Only V3 and prior are open-source.)
* Zarafa
* Zentyal, with support for native groupware clients (Kontact, Novell Evolution) natively for Microsoft Outlook and web interface
* Zimbra
* Zulip

### Groupware: Web-based software

* Axigen
* Bricolage, content management system
* BigBlueButton, Web meetings
* Collabora Online, Enterprise-ready edition of LibreOffice enabling real-time collaborative editing of documents, spreadsheets, presentations and graphics
* DotNetNuke, also called DNN: module-based, evolved from ASP 1.0 demo applications
* EGroupware, a free open source groupware software intended for businesses from small to enterprises
* EtherPad, collaborative drafting with chat
* Feng Office Community Edition
* FusionForge, has wiki, forums, mailing lists, FTP, SSH, subdomains, hosting, email alias, backups, CVS/SVN, task management
* Group-Office, Web-based groupware for sharing calendars, files, e-mail, CRM, Projects, Mobile Synchronization and much more.
* Horde
* HumHub a free and open-source enterprise social network solution
* IceWarp Server
* Jumper 2.0, collaborative search engine and knowledge management platform
* Kolab Groupware, integrated Roundcube web frontend
* Kune, collaborative federated social network, based on Apache Wave
* Loomio, for making decisions together (AGPL).
* MediaWiki, which provides core content management and integrates with many other tools via extensions
* Nextcloud, file hosting service, functionally similar to Dropbox, Office 365 or Google Drive when used with its integrated office suite solutions Collabora Online or OnlyOffice
* OnlyOffice Community Server, available for Microsoft and Linux
* OpenBroadcaster LPFM IPTV broadcast automation tools
* Overleaf for creating LaTeX documents
* phpGroupWare
* Simple Groupware
* SOGo, integrated email, calendaring with Apple iCal, Mozilla Thunderbird and native Outlook compatibility
* Tiki Wiki CMS Groupware, has wiki, forums, calendar, ticket system, workflow engine
* Tine 2.0
* Tonido, free collaborative software with workspace synchronizing, Web access from personal desktop; cross-platform
* Zarafa, full MAPI MS Exchange replacement for Linux, GPL+proprietary
* Kopano, full MAPI MS Exchange replacement for Linux, GPL+proprietary
* Zentyal
* Zimbra

### Other

* Alfresco, enterprise content management system: document management, workflow, and portal
* Drupal Framework, open source content management framework: document management, web pages, attachments, forums, photos, social profiles, collaboration tools
* Liferay Enterprise Portal, open source enterprise portal: document management, wiki, social tools, workflow
* LogicalDOC, document management system: document management, workflow
* Nuxeo EP, enterprise content management system: document management, workflow
* OpenKM, open source document management system: document management

## Project collaboration software
### Web-based software

* 5day.io, is a modern work management tool
* Ceiton, workflow-based project management with Gantt chart, scheduling calendar and time-tracking
* Central Desktop, has project management, wiki, file upload, review and approve, calendar, document management
* Clarizen, online on-demand, collaborative project execution software
* dotProject
* Easy Redmine, open-source project management software
* Easy Projects
* EGroupware, is free open source groupware software intended for businesses from small to enterprises
* Feng Office Community Edition
* Fle3
* Gitea
* GitLab
* Group-Office, Web-based groupware for sharing calendars, files, e-mail, CRM, Projects, Mobile Synchronization and much more.
* Horde
* InLoox, web-based project management and collaboration software with Outlook integration
* LiquidPlanner, web-based project management and collaboration software
* Mindquarry, has document synchronizing, wiki, task management
* PBworks is a commercial real-time collaborative editing (RTCE) system
* phpGroupWare, has a project collaboration module
* Plone, content management
* project.net
* Projectplace, full suite of collaborative project tools
* Redmine, for software projects includes issue tracking, wiki, basic file and document management with hooks to major version control systems: SVN, Git, etc.
* Simple Groupware
* TeamLab, has forums, blogs, bookmarks, wiki, task management, instant messaging, mobile version, CRM, online document editors
* TogetherJS by Mozilla, an open-source javascript library that can transform any web application into a real-time collaborative editor.
* Trac, has wiki, document management, ticket system and version control system
* Traction TeamPage integrated action tracking, wiki, live status, notification, and streams organized by person, task, project, and shared permissioned space.
* web2project, a dotproject fork with active current development and some innovations: subprojects, etc.
* WiserEarth, social network and database that include an open-source Groupware (closed)
* Wrike, interactive web-based project management software and tools for remote collaboration
* Zoho Projects, a web-based project management software with collaboration features such as Interactive Feeds, Chat, Calendar, Forum, Wiki Pages and shared Document management

### Other

* Croquet project, collaborative virtual environment
* Open Wonderland, open source Java toolkit to make collaborative 3D virtual worlds
* Wiki engines: see List of wiki software
* Realtime editors: see Collaborative real-time editor
* Revision control for software engineering projects: see Comparison of revision control software
* Collaborative development environment
* Tools for collaborative writing such as O'Reilly Media's wiki-like git-managed authoring platform Atlas

### Comparison

| Name | Mail transfer agent | Mail storage type | IMAP server | IMAP shared | Calendar format | Calendar shared | IM server | WebDAV | Web UI | Contacts shared | Files shared | Web admin UI | Antivirus | Spam filter | Notes |
| Axigen | SMTP proprietary RFC compliant | proprietary indexed storage | proprietary RFC compliant | Yes | iCal | available from Microsoft Outlook & Webmail | No | No | Yes | Yes | No | Yes | ClamAV | SpamAssassin, Sieve, others | Mobile synchronizing using full compliant ActiveSync, Ajax GUI, multiplatform, Microsoft Outlook connector with online/offline modes |
| Bynari | SMTP Postfix | IMAP | Cyrus IMAP | Yes | iCal | iCal | Jabber | Yes | Yes | Yes | Yes | Yes | ClamAV | SpamAssassin and Sieve | Mobile synchronizing using full compliant ActiveSync, Ajax webapp, Microsoft Outlook connector |
| Citadel/UX | Custom | Berkeley DB | Custom | Yes | iCal | Yes | Yes | GroupDAV and WebCal support | Yes | Yes | various methods | Yes | ClamAV on SpamAssassin | SpamAssassin, or pre-processed with Postfix or qpsmtpd | Hot backups need retained recent database logs |
| EGroupware | SMTP | IMAP server dependent | Cyrus or any IMAP server | Yes | iCal | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes on Linux- any external | Sieve filters | Ajax GUI, Mobile responsive template, integrates with: mobile devices (Z-Push), any IMAP client |
| Feng Office Community Edition | Sendmail, SMTP | Database or File system | Any IMAP server | No | SQL, iCal | iCal | No | No | Yes | Yes | Yes | Yes | Any external (e.g., ClamAV) | Mail server dependent (e.g., SpamAssassin) | Ajax GUI; runs on any operating system with Apache, PHP and MySQL, e.g., Windows, Linux, macOS); commercial support via Feng Office |
| Group-Office | Custom Postfix | IMAP server dependent | Custom | Yes | iCal | Web interface | No | Yes | Yes | Yes | Yes | Yes | ClamAV | SpamAssassin, DSPAM | Synchronizes with: Microsoft Outlook, iPhone, Android, Symbian, Palm OS, Pocket PC, other SyncML or ActiveSync clients |
| Horde | Sendmail, SMTP | No | Cyrus, others | No | No | DB, ICAL export | No | Yes | Yes | Yes | Yes | Yes | No | rule-based filtering | integrates into Kolab, has SyncML-interface |
| Jumper 2.0 | No | No | Custom | No | SQL, iCal | iCal | No | Yes | Yes | Yes | Shares any content, media, or data | Yes | No | No | Enterprise bookmarking engine, uses peer and social networking principles to tag and link distributed data resources for universal search regardless of vendor, format, or location |
| Kolab | Postfix | IMAP (Kolab-XML format) and LDAP | Cyrus and (experimental) Dovecot | Yes | iCal and Kolab-XML format | IMAP, iCal- and HTML-Export | No | Yes | Roundcube | IMAP and LDAP | Yes | Yes | ClamAV, others | SpamAssassin, others | Runs on almost all Unix/Linux; integrated Roundcube webfrontend, and ActiveSync (via Syncroton), and serves most common PIM-clients such as Kontact, Microsoft Outlook (with connector plug-in) and others. |
| OpenGroupware | Postfix | Mail Dir | Cyrus | No | No | Export to iCal | XMPP, if purchased | No | No | No | No | If purchased | | | |
| Open- Xchange | Postfix | IMAP server dependent | Cyrus, Courier, Dovecot | Yes | iCal | LDAP, CalDAV, Google, Export to iCal | No | Yes | Yes | Yes | Yes | If purchased | ClamAV, others | SpamAssassin, others | Ajax GUI, Microsoft Outlook integration, tasks module |
| PhpGroupWare | No | No | No | Un­known | Un­known | ICAL | Yes | Un­known | Yes | Un­known | Yes | Yes | | | Quite similar to eGroupWare |
| Simple Groupware | SMTP | IMAP server dependent, Database | Cyrus, Courier IMAP, UW IMAP, others | Yes | SQL, iCal and XML format | Database, ICAL import/export | Built-in chat module | Planned for 0.3 | Yes | Yes | Yes | Yes | ClamAV, others | Mail server dependent | Synchronizes with: Outlook, Symbian, Pocket PC, mail notifications, document preview |
| Tine 2.0 | Postfix or any other SMTP Server | SQL | DBMail or other IMAP-server | if IMAP server support | SQL | not yet CalDAV or iCal | No | No | Yes | Yes | No | Yes | No | No | Uses external IMAP server; synchronizes with: Symbian, Palm OS, Pocket PC, other ActiveSync clients |
| Tonido Workspace | No | No | No | No | Synchronizing, Web-based access | Built-in chat module | Yes | Yes | Yes | Yes | Yes | Yes | No | No | Free, for Windows, Mac OS X, Linux; built-in web server allows P2P synchronizing similar to Microsoft Groove and usual guest workspace access via Ajax-based WebUI |
| Twproject | relies on existing SMTP | synchronizes with clients | No | Yes | iCal | iCal | No | No | Yes | Yes | Yes | Yes | No | No | Synchronizes with: Outlook, Google calendars, mail; full project management module |
| Wrike | No | No | No | No | iCal | Yes | No | Yes | Yes | Yes | Yes | Yes | No | No | Mobile synchronizing using full compliant Dropbox & Google docs, rich Ajax web access, Microsoft Outlook & iMail connector |
| Zarafa | Postfix, Exim, Qmail, Sendmail, others | MySQL, optional attachments on filesystem | Yes | Public Folder available | Outlook, WebApp, Webaccess, iCal, Z-Merge | Outlook, WebApp, Webaccess, Z-Merge | Yes | Yes | Yes | Yes | Yes | Yes | ClamAV, others | SpamAssassin, others | HTML5 WebApp (with Videoconferencing functionality and (large) file sharing), Ajax WebAccess, online and offline Outlook compatibility, fully ActiveSync compatible using Z-Push (Symbian, Pocket PC, iPhone (firmware 2.X), Nokia (mail4Exchange)), integrates with AD and LDAP, own serverside integration framework Z-Merge |
| Kopano | Postfix, Exim, Qmail, Sendmail, others | MySQL, optional attachments on filesystem | Yes | Public Folder available | Outlook, WebApp, iCal, Z-Merge | Outlook, WebApp, Z-Merge | Yes | Yes | Yes | Yes | Yes | Yes | ClamAV, others | SpamAssassin, others | HTML5 WebApp (with Videoconferencing functionality and (large) file sharing), Ajax WebAccess, online and offline Outlook compatibility, fully ActiveSync compatible using Z-Push (Symbian, Pocket PC, iPhone (firmware 2.X), Nokia (mail4Exchange)), integrates with AD and LDAP, own serverside integration framework Z-Merge |
| Zentyal | Postfix | IMAP server dependent | Dovecot | No | Outlook, Webaccess, iCal | Outlook, Webaccess | Un­known | Un­known | Yes | Yes | Un­known | Yes | ClamAV | SpamAssassin | Ajax Web UI, online and offline Outlook native compatibility, fully ActiveSync compatible using SOGo integrates with Samba AD server |
| Zimbra | Custom Postfix | Mail Dir w/ index db | Custom | No | iCal | ICAL | (Removed in v8) | Yes | Yes | Yes | Yes | Yes | ClamAV | SpamAssassin, DSPAM | |
| Name | Mail transfer agent | Mail storage type | IMAP server | IMAP shared | Calendar format | Calendar shared | IM server | WebDAV | Web UI | Contacts shared | Files shared | Web admin UI | Antivirus | Spam filter | Notes |