WhatsApp Messenger is a proprietary, cross-platform instant messaging subscription service for smartphones with Internet access. In addition to text messaging, users can send each other images, video, and audio media messages. The client software is available for Google Android, BlackBerry OS, Apple iOS, selected Nokia Series 40, Symbian, selected Nokia Asha platform and Microsoft Windows Phone. WhatsApp Inc. was founded in 2009 by American Brian Acton and Ukrainian Jan Koum (also the CEO), both former employees of Yahoo!, and is based in Mountain View, Santa Clara County, California.
Competing with a number of Asian-based messaging services (like LINE, KakaoTalk, WeChat and Zalo), WhatsApp handled ten billion messages per day in August 2012, growing from two billion in April 2012, and one billion the previous October. On June 13, 2013, WhatsApp announced on Twitter that they had reached their new daily record by processing 27 billion messages. According to the Financial Times, WhatsApp "has done to SMS on mobile phones what Skype did to international calling on landlines."
As of November 10, 2013, WhatsApp has over 190 million monthly active users, 400 million photos are shared each day, and the messaging system handles more than 10 billion messages each day. In a December 2013 blog post, WhatsApp claimed that 400 million active users use the service each month.
4 Open WhatsApp Project
5 See also
7 External links
WhatsApp uses a customized version of the open standard Extensible Messaging and Presence Protocol (XMPP). Upon installation, it creates a user account using one's phone number as username (Jabber ID: [phone number]@s.whatsapp.net). WhatsApp software automatically compares all the phone numbers from the device's address book with its central database of WhatsApp users to automatically add contacts to the user's...