Businesses may favor Microsoft Lync, including its hooks into Microsoft Outlook and its support for video chat and desktop sharing. The program, a part of the Office365 lineup, includes cross-platform chat, video conferencing and VoIP calling. Because the app is included with Office365, pricing depends on which support plan you purchase. Large organizations may deploy a dedicated internal Lync server, while small businesses may let Microsoft do the hosting. Lync users can freely communicate with Lync or Skype users, and self-hosted servers may open up other instant-messaging protocols, too.