Twitter is an online social networking service and microblogging service that enables its users to send and read text-based posts of up to 140 characters, known as "tweets". It was created in March 2006 by Jack Dorsey and launched that July. The service rapidly gained worldwide popularity, with over 500 million active users as of 2012, generating over 340 million tweets daily and handling over 1.6 billion search queries per day.Since its launch, the Twitter website has become one of the top 10 most visited on the Internet, and has been described as "the SMS of the Internet." Unregistered users can read the tweets, while registered users can post tweets through the website interface, SMS, or a range of apps for mobile devices.Twitter Inc. is based in San Francisco, with additional servers and offices in New York City, Boston, and San Antonio.Twitter has been cited as an important factor in the Arab Spring and other political protests.Twitter was founded in San Francisco, but it's used by people in nearly every country in the world. The service is available in more than 20 languages, and we continue to add them. You can change your language preference in your user settings with just a few clicks.
Net income $ 150 million (2011)