SOGo
Groupware server with webmail, calendars and address books over IMAP, CalDAV and CardDAV.
licenseGPL-2.0stars2.2klanguageObjective-Cself-hostyes
What it replaces
+1 −1Commercial: Gmail
Open source: SOGo, self-hosted
Groupware server with webmail, calendars and address books over IMAP, CalDAV and CardDAV.