Geez! Did anybody even do a 2nd check on Wechat over at Wikipedia? There’s a whole section personal security on how this Chinese app is spying on its users, with countries outside concerned about censorship as well as serious privacy incursions!
If you want a hive mind, be prepared to lose your privacy rights, as if that might matter for busy little bees these days. Didn’t look at the other services, but lets just say that you might want to think about some kind of firewall between you work and private lives.