<p>With Facebook's acquisition of WhatsApp last month, mobile messaging apps have taken center stage thanks to the sheer weight of their ever-expanding user bases. Such apps are colossal players in the mobile game, originating everywhere from Silicon Valley in California to Gurgaon, India.</p><p>Here are 10 international messaging apps whose worldwide influence is racking up millions of users from across the globe.</p><p>WhatsApp : United States</p><p>With 450 million monthly users, it's clear why this US-based messaging giant has been the talk of the town. Now under Facebook's ownership, WhatsApp is still available for iOS, Android, Windows Phone, BlackBerry and Symbian.Viber : Cyprus</p><p><a href="http://readwrite.com/2014/03/06/10-biggest-popular-mobile-messaging-apps-world-whatsapp">Keep reading...</a></p><p>Read also:</p><p><a href="http://www.marketwatch.com/story/chitrchatr-congratulates-whatsapp-on-its-acquisition-by-facebook-for-19-billion-2014-03-06?reflink=MW_news_stmp">ChitrChatr Congratulates WhatsApp on Its Acquisition by Facebook For $ 19 Billion</a> (MarketWatch)</p><p><a href="http://www.morningstar.co.uk/uk/news/122098/facebook-shares-too-expensive.aspx">Facebook Shares Too Expensive</a> (Morningstar)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=d5B7BcpSgSbb4-M-xrviMA83uQKyM&authuser=0&ned=us">58 additional articles.</a></p>