Twitter is an American microblogging and social networking service on which users post and interact with messages known as "tweets". Tweets were originally restricted to 140 characters, but on November 7, 2017, this limit was doubled to 280 for all languages except Chinese, Japanese, and Korean.
LEADERSHIP: Jack Dorsey
LOCATION: San Francisco, CA
YEAR INVESTED: 2009 — Series D Funding
STATUS: IPO (TWTR)