Web-based groupware server written in PHP, bundling email, calendar, address book, and project management in one self-hosted suite.
302+1 this week115PHPOtherWell maintainedUpdated yesterday
#groupware
Best open-source self-hosted groupware suites (2026)
Groupware bundles email, calendar, contacts and file collaboration into one system, often as a replacement for Exchange or Google Workspace. When choosing, check native support for CalDAV, CardDAV and IMAP, and whether you need video meetings or CRM features. SOGo focuses on standards-based calendaring, address books and webmail. nextcloud/mail suits teams already running Nextcloud, since it connects to any IMAP account. Apache OpenMeetings is built for web video conferencing, with a whiteboard and collaborative document editing.
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Open-source groupware and CRM platform combining email, calendar, contacts, file sharing, invoicing and support ticketing, self-hosted or cloud.
286+2 this week62PHPAGPL-3.0Updated yesterday
Self-hosted web video conferencing and groupware suite with whiteboard, chat and collaborative document editing, built on the Kurento media server.
688263JavaOtherUpdated 18 hours ago
SOGo is an open-source groupware suite offering calendaring, address books, and webmail, with native CalDAV, CardDAV, and IMAP support.
2.2K+3 this week331Objective-CGPL-2.0Updated yesterday
A mail client app for Nextcloud that connects to any IMAP account from within your Nextcloud instance.
1.1K+1 this week381JavaScriptAGPL-3.0Well maintainedUpdated 18 hours ago