Twitter, Inc. was an American social media company based in San Francisco, California, which operated and was named for its flagship social media network prior to its rebrand as X. In addition to Twitter, the company previously operated the Vine short video app and Periscope livestreaming service. In April 2023, Twitter merged with X Holdings and ceased to be an independent company, becoming a part of X Corp.

Parag Agrawal is an Indian-American software engineer and businessman who was the CEO of Twitter, Inc. from November 2021 to October 2022.