Comcast vs. Xfinity — What's the Difference?

Comcast Corporation (formerly registered as Comcast Holdings) is an American telecommunications conglomerate headquartered in Philadelphia, Pennsylvania. It is the second-largest broadcasting and cable television company in the world by revenue (behind AT&T), the largest pay-TV company, the largest cable TV company and largest home Internet service provider in the United States, and the nation's third-largest home telephone service provider.

Comcast Cable Communications, LLC, doing business as Xfinity is a telecommunications company and division of Comcast Corporation used to market consumer cable television, internet, telephone, and wireless services provided by the company. The brand was first introduced in 2010; prior to that, these services were marketed primarily under the Comcast name.