Based on open standards, CommuniGate Pro provides an integrated platform for Store-and-Forward (E-mail, Calendaring) and Real-Time (VoIP, Video, Instant Messaging, White Boards) communications over IPv4 and IPv6 networks.
CommuniGate Pro can be used via its built-in WebUser Interface, the bundled Pronto! communication client, as well as any third-party client applications employing the SMTP, IMAP, POP, MAPI, SIP, XMPP, HTTP, FTP, WebDAV, CalDAV, CardDAV, XIMSS, and other standard protocols. Can exchange E-mail and Groupware information with other standard-based servers and systems using the SMTP protocol. CommuniGate Pro supports Real-Time communications (VoIP, IM, Presence) with other standard-based systems using the SIP and XMPP protocols.
Communigate Pro is commercial software. Up to 5 users is considered "Community Edition", that is free and does not require license.