What are the fastest Internet providers in the US? There isn't one definitive answer to this question since factors such as coverage area, pricing plans, and device compatibility all play a role in determining who provides the best internet service in any given region or cityscape. However, some popular providers across America include AT&T (which boasts gigabit internet speeds), Comcast (which has both gigabit and ultrafast Xfinity services), Verizon FiOS (with top speeds reaching 500 Mbps download/150 Mbps upload), Time Warner Cable (formerly known as Charter Communications), and more.