| SOGo | |
|---|---|
 | |
 | |
| Developer | Alinto |
| Stable release | 5.12.4[1]  / 6 October 2025 |
| Written in | Objective-C[2] |
| Operating system | Unix-like[3] |
| Platform | GNUstep, SOPE[2] |
| Available in | 44 languages[4] |
| Type | Groupware |
| License | GPL v2/LGPL v2 |
| Website | sogo |
| Repository | |
SOGo, formerly Scalable OpenGroupware.org, is an open sourcecollaborative software (groupware) server with a focus on simplicity and scalability.[5]
SOGo provides collaboration forMozilla Thunderbird,Microsoft Outlook,Apple Calendar, andBlackBerry client users. Its features include the ability to share calendars, address books, and email using an open source, cross-platform environment. The Funambol middleware and the Funambol SOGo Connector allowSyncML clients to synchronize contacts, events, and tasks.
SOGo supports standard groupware capabilities includingCalDAV, CalDAV auto-scheduling,CardDAV, WebDAV Sync, WebDAV ACLs, andiCalendar.
Microsoft Outlook support is provided through an OpenChange storage provider to remove theMAPI dependency for sharing address books, calendars, and emails. Native connectivity to Microsoft Outlook allows SOGo to emulate a Microsoft Exchange server to Outlook clients.[6]
SOGo uses existing services including Microsoft Active Directory, OpenLDAP, SQL, and IMAP. Usage of industry services contributes to scalability. It is accessible through its web interface, desktop clients, or mobile devices.
The web interface uses an AJAX interface and is available in several languages. The look and feel of version 2 mimics Mozilla Thunderbird and provides browser drag and drop capabilities for contacts, events, and mail messages. Single sign-on security capabilities are available by using CAS, WebAuth, or Kerberos. Version 3 is based onAngularJS and Angular Material and provides a fully responsive interface.
Supported desktop clients are Mozilla Thunderbird with the Lightning extension, Apple iCal, and Microsoft Outlook. The SOGo Connector and Integrator extensions for Thunderbird provide improved functionality.[7]
Mobile devices are generally handled through the MicrosoftExchange ActiveSync (EAS) protocol. Devices such Apple's iPhone are handled natively by SOGo as iOS supportsCalDAV andCardDAV. Other devices can access the web interface, which isresponsive since release 3.0.0.
The project's history began in 1996 with LSOffice, an online collaboration platform developed by German Internet service provider MDlink. LSOffice was renamed SKYRiX Groupware Server, and Skyrix Software AG ofMagdeburg, Germany, was spun off to take over the product in 2000.[8] It was based upon the SOPE application server, an open source derivative ofWebObjects developed by the same company.
Around 2003, much of the SKYRiX Groupware Server source code was released as an open source project calledOpenGroupware.org ("OGo").[8][9] Though it was intended to compliment theOpenOffice.org office productivity suite, the two projects were independent.[9] OpenGroupware.org was functionally rich but offered limited scalability. It was primarily designed for workgroups or small organizations, not large enterprise deployments.[10]
In early 2004, a large client contracted with Skyrix Software to deploy OpenGroupware.org to 60,000 users. The result of this project was Scalable OpenGroupware.org ("SOGo"), a fork of OpenGroupware.org focused on scalability.[10] Though lacking much of the functionality of OpenGroupware.org, it retains the key email, calendaring, and address book features and conforms to open standards like CalDAV and CardDAV.
Development of OpenGroupware.org began to stall around 2006, and the project was largely dormant by 2009.[11]
SOGo remains actively maintained. Open source consulting company Inverse ofMontreal, Canada, took over development of the project around 2006.[6] In May 2022, email services provider Alinto ofLyon, France, became the new commercial steward of the project.[12]
Development mostly slowed down around 2006 and essentially stopped at the end of 2009.
