X Corp. is an American technology company established by Elon Musk in 2023 as the successor to Twitter, Inc. It is a wholly owned subsidiary of X Holdings Corp., which is itself owned by Musk. The company owns the social networking service X and has announced plans to use it as a base for other offerings.

X, commonly referred to by its former name Twitter, is a social media website based in the United States. With over 500 million users, it is one of the world's largest social networks and the fifth-most visited website in the world. Users can share text messages, images, and videos through posts. X also includes direct messaging, video and audio calling, bookmarks, lists and communities, and Spaces, a social audio feature. Users can vote on context added by approved users using the Community Notes feature.