WSJ.com: US Business
A WhatsApp Rival That Makes Money
Updated Feb. 26, 2014 2:48 a.m. ET
BARCELONA—Jan Koum, WhatsApp Inc.'s chief executive, vowed this week to keep his messaging service simple, despite a $19 billion deal to be swallowed up by Facebook Inc.
Sirgoo Lee, co-chief executive of South Korea's Kakao Corp., is making no such promises. With 133 million registered users, Mr. Lee is rolling out dozens of services—from basic messaging, mobile gaming, Instagram-style photo sharing, and online shopping—all on a...
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