You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract After Facebook: Meet 11 Hot Messaging Apps Eating the World Facebook Bought WhatsApp for $19B, But There Are Many Other SMS Replacements With Scale By Cotton Delo, Published on March 25, 2014 1 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.