SOGo
SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface.
SOGo is a self‑hostable groupware server that provides web‑based email, calendars, and address books for organizations. It exposes data through open standards such as CalDAV, CardDAV, GroupDAV and Microsoft ActiveSync, allowing native Outlook compatibility and synchronization with mobile devices. The system includes a rich AJAX web interface and can be accessed via standard clients, including Thunderbird with the SOGo connector.
The software targets businesses and communities that need a free, open‑source solution for collaborative messaging and scheduling. It is designed for scalability, having been deployed in production environments with thousands of users, and offers multilingual support through community‑maintained translations.
SOGo is released under LGPL‑2.1, with source code available on GitHub, and does not require subscription fees. Development is community‑driven, with contributions welcomed in documentation, translations, bug fixes, and feature ideas.
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