X Corp. is a technology company that owns the social networking and microblogging service X (formerly Twitter) since 2023 after the merger with the platform's owner, Twitter, Inc., which was acquired in 2022 by Elon Musk.
Registered users on X can send and read short posts (tweets), which are text messages limited to 280 characters, and can also repost (retweet) a post; but unregistered users can only read them. Users access X through the website interface or mobile device app.