Launching Next has discovered 5 hangouts startups.
Campfire - Live group video chat & hangouts
Campfire for iOS: the only video chatting app that supports up to 4 people at the same time. Based on advanced engine and content delivery service of a popular app ALIVE.
Lekker.IM
Chat as a Service
Kibo
Kibo — hides confidential information from third parties or other unwanted eyes