I like that there is no sign up required and you can send the link to everyone for easy conference calling. Also cool that it lights up which party is talking.

Callback feature where the app calls all attendees to participate in the call rather than having the cumbersome process of having to dial in and wait until the host joins the call and lets you into the conference. Additionally, you can already see a list of attendees who've joined the call.

LoopUp is SO EASY to use. The plug in on outlook is amazing for adding details to meetings. When joining a call all you click is a link, and no need to dial in because once in the meeting room, loopup calls you! and if you are running the meeting, you can call others that are not on the call yet to bring them in.