Social Media WhatsApp stakes claim as leader in mobile messaging Recent data show the messaging app is preferred by users in 109 countries—beating Facebook Messenger for the No. 1 spot. How are brand managers using it? Here’s what you should know. By Clare LaneMay 26, 2016 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.