Snapchat said in May it was adding an option for users to chat with text, joining an increasingly crowded mobile-messaging market that also attracted Facebook. The social network agreed to pay about $19 billion for WhatsApp Inc. in February. U.S. Forays Alibaba, China’s biggest e-commerce company, is building a presence in the U.S. as it prepares to go public with a listing on the New York Stock Exchange this year, in what could be the biggest IPO in U.S. history. Last year, Alibaba started a U.S.-based fund to invest in e-commerce and emerging technologies, led by Michael Zeisser, who previously headed Liberty Media ... (full story)