yes. 

A group voice chat with a pretty UI. iOS only for now. The reason its blowing up is that the big names, the media and the VCs (who also invested in it) are hyping it up as the 'next big thing'. (it really isn't)

Zello has been there for 10 years and has 165 million users. Clubhouse is nothing new, apart from a new way to link up your phone numbers (very bad idea) I guess.

When the hype dies down, we'll see if they can really compete.