It's launching with support for apps on desktop or mobile or the web; and is designed with features like a visual roster of who is currently connected, single-click ability to join a call, plus screen sharing and file sharing. There's a free basic edition if all you need is the calls, messaging and chat features, while Plus and Pro versions adding the kinds of features IT managers probably dig (Active Directory configurations, email domains, unlimited VoIP support) can cost as much as $15 per user, and there's a 30-day free available for Pro.