List of collaborative software Comparison Comparison

| Name_ | Mail_transfer_agent | Mail_storage_type | IMAP_server | IMAP_shared | Calendar_format | Calendar_shared | IM_server | WebDAV | Web_UI | Contacts_shared | Files_shared | Web_admin_UI |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kolab | Postfix | IMAP (Kolab- XML format) and LDAP | Cyrus and (experimental) Dovecot | Yes | iCal and Kolab- XML format | IMAP , iCal - and HTML -Export | No | No | Horde | IMAP and LDAP | No | Yes |
| Open - Xchange | Postfix | IMAP server dependent | Cyrus or any IMAP server | Yes | iCal | LDAP , Export to iCal | No | Yes | Yes | Yes | Yes | If purchased |
| Feng Office Community Edition | Sendmail , SMTP | Database or File system | Any IMAP server | No | SQL , iCal | iCal | No | No | Yes | Yes | Yes | Yes |
| OpenGroupware | Postfix | Mail Dir | Cyrus | No | No | Export to iCal | XMPP , if purchased | No | No | No | No | If purchased |
| PhpGroupWare | No | No | No | Unknown | Unknown | ICAL | Yes | Unknown | Yes | Unknown | Yes | Yes |
| Qontext | N/A | N/A | N/A | N/A | No | No | No | No | Yes | Yes | Yes | Yes |