X.com may refer to:
- X.com (bank), a defunct online bank co-founded by Elon Musk that currently redirects to Twitter
- Twitter, a social media platform currently rebranding to "X" after being purchased by Elon Musk
See also
- XCOM
- X.Org (disambiguation)
- X (company)
- X Corp., the parent company of Twitter
- EXCOMM