I personally think Facebook Messenger is better than Whatsapp, and you can easily upgrade to a private group when appropriate. Whatsapp seemed to miss the ball

I personally think Facebook Messenger is better than Whatsapp, and you can easily upgrade to a private group when appropriate. Whatsapp seemed to miss the ball on tablets/everywhere by focusing only on phones and requiring a phone number, which obviously worked for them but I think Facebook's product is better.