<p>SAN FRANCISCO (Reuters) - The crowded, fragmented mobile messaging app market, one of the hottest sectors in Silicon Valley, just got more crowded.</p><p>Keith Teare, a veteran Valley entrepreneur, on Wednesday launched just.me, a service that claims to combine email, multimedia messaging and cloud storage in a single iPhone app.</p><p>The startup, backed by Google Inc's venture arm and True Ventures, is the latest entrant among a wave of applications, including Whatsapp, Kik, and Tencent Holdings Ltd's Wechat, that is viewed by industry insiders as having the potential to undermine Facebook Inc's position in the social Internet arena and rise to become the next dominant Internet company.</p><p>In recent months, both Facebook and Google have sought to acquire Whatsapp with offers of more than $1 billion, according to unconfirmed reports on tech blogs.</p><p><a href="http://www.businessinsider.com/googles-venture-arm-is-backing-a-rival-to-whatsapp-the-messaging-startup-rumored-to-be-worth-1-billion-2013-4">Keep reading...</a></p>