WhatsApp user base crosses 2 billion mark, second only to Facebook
https://www.reuters.com/article/us-whatsapp-users/whatsapp-user-base-crosses-2-billion-mark-second-only-to-facebook-idUSKBN20626L
Messaging app WhatsApp said on Wednesday it now has over 2 billion users worldwide, making it the largest social media platform after Facebook Inc, its parent company.