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Alinto/sogo

SOGo is an open-source groupware suite offering calendaring, address books, and webmail, with native CalDAV, CardDAV, and IMAP support.

Open-source alternative to:Microsoft ExchangeGoogle Workspace

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Last commit
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What is it?

SOGo is a groupware suite that bundles calendaring, address book management, and a full-featured webmail client. It also handles resource sharing and permissions, so teams can share calendars and contacts under access controls.

SOGo relies on standard protocols such as IMAP, CalDAV, and CardDAV rather than custom plugins. This lets common clients including Microsoft Outlook, Apple iCal, iPhones, Mozilla Lightning, and various mobile devices connect to it directly.

The project is written in Objective-C and is distributed under the GPL-2.0 license. Building it requires both the SOGo and SOPE source trees, and a separate SOGo Connector extension exists for Thunderbird.

Key features

  • 01Calendaring and address book management in one suite
  • 02Full-featured webmail client
  • 03Resource sharing and permission handling
  • 04Native CalDAV, CardDAV, and IMAP connectivity without plugins
  • 05Works with Outlook, Apple iCal, iPhone, and Thunderbird via the connector

Use cases

  • Hosting a self-managed groupware server for an organization's email, calendars, and contacts
  • Giving staff a webmail interface alongside desktop and mobile calendar clients
  • Sharing team calendars and address books with access controls

Quick start

  1. 1

    Get the SOPE and SOGo source code from Alinto's GitHub repositories

  2. 2

    Follow the compilation instructions in the official SOGo FAQ

Things to know

  • The README gives no package-manager install; you must compile SOPE and SOGo from source, with instructions only in the external FAQ.
  • Licensed under GPL-2.0, a copyleft license that requires derivative works to be shared under the same terms.

In collections

Self-hosted email servers and newslettersSelf-hosted apps

Topics

#groupware#caldav#carddav#webmail#calendar#imap#self-hosted#angularjs-material#objective-c#sogo

FAQ

What is sogo?
SOGo is an open-source groupware suite offering calendaring, address books, and webmail, with native CalDAV, CardDAV, and IMAP support. SOGo is a groupware suite that bundles calendaring, address book management, and a full-featured webmail client. It also handles resource sharing and permissions, so teams can share calendars and contacts under access controls.
Is sogo free to use? What license does it have?
sogo is open source under the GPL-2.0 license. Check the license terms before using it in commercial products.
Is sogo still maintained?
Actively maintained. The last commit to sogo was on Nov 6, 2026.
What can I use sogo for?
Hosting a self-managed groupware server for an organization's email, calendars, and contacts Giving staff a webmail interface alongside desktop and mobile calendar clients Sharing team calendars and address books with access controls
How do I install sogo?
Get the SOPE and SOGo source code from Alinto's GitHub repositories Follow the compilation instructions in the official SOGo FAQ
Where can I get sogo?
The source code and installation instructions are on GitHub: https://github.com/Alinto/sogo

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