Kaizala?
Seriously, does the world need yet another WhatsApp contender? Does Microsoft? I mean, they already have Skype, Skype for Business, Yammer and Teams - surely one of these apps would be a better fit as a WhatsApp-For-Business, surely?
You have to question who's making the decisions here, because in a sane and sensible company Kaizala would have been made into a USP for one of the existing platforms rather than competing for users against them and ensuring neither one of them gets any traction.