Mark Zuckerberg founded the social networking website - facebook with his roommate friends - Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes in Harvard University. On October 28’ 2003, Mark Zuckerberg wrote the Facemash, the predecessor to Facebook and launched the facebook on 4th February 2004.It is created in C++ and PHP. Now facebook have a more than 1 billon active user and half of them use facebook through mobile.
Twitter was created in 21 March’ 2006 and launched in 15 July’2006. The founders of twitter are Jack Dorsey, Noah Glass, Evan William and Biz stone. Jack Dorsey is executive Chairman; Dick Costolo is CEO, Evan William company director and Biz Stone creative director of company. Twitter is microblogging social networking site. The users send the message in 140 characters in text based message. The twitter headquarters in San Francisco, United State. In 2012 the active users are – 500 million.
Linkedin is the professional social network website. Santa Monica founded linkedin in Dec 2002 in Mountain View, California and launched in 5 May 2003. Reid Hoffman, Allen Blue, Konstantin Guericke and Eric Ly are the founder of Linkedin. Reid Hoffman is the Executive Chairman and Jeff Weiner is the CEO of Linkedin Corporation.
Google Plus is the famous multilingual social networking and identity service site. It was launched by google inc, originally launched as Google Circles in 28 June 2011. 100 million users are actively on monthly basis and till now it has more than 400 million users.
Myspace founded by Santa Monica in California in 2003. The founders are Chris Dewolfe and Tom Andeson. The Head quarter is in Beverly Hills, Califonia. Myspace is the social networking site significant influence in pop culture and music and also launched the gaming platform - Zynga and Rock.
Reditt is known as a social news website. It was founded in June 2005 by Steve Huffman and Alexis Ohanian. The CEO of the company is Yishan Wong. In 2008 the reditt become the open source project and in 6 Sep ‘ 2011 Reddit became operationally independent of Condé Nast.
Stumble Upon created by Garrett Camp, Geooff Smith , Justin LaFrance and Eric Boyd in November 2001 during Garrett's time in post-graduate school in Calgary, Canada. It is known as the discovery engine it means that it is a form of web search engine. The stumleupon uses collaborative filtering and discover the page and rate web page, video, music, pictures to virtual communities of like-minded Web surfers.