CenturyLink and Frontier Communications are two of the biggest internet providers in the U.S. today, and with their introduction into the world of fiber-optic internet, more and more people are choosing these companies over their competitors to fulfill their high-speed internet, phone and TV needs. Though these two broadband powerhouses share many similarities, when it comes to pricing, service, and plan options, each provider sets itself apart from the other in its own unique way. Below is an in-depth comparison of CenturyLink and Frontier.