January 18, 2022 at 1:54 pm. Chicago’s millions of people have plenty of internet service providers (ISPs) to choose from. That includes top providers like Xfinity, which ranks No. 1. Fastest Internet Providers in Chicago. AT&T - Fast up to 5 Gbps (5000 Mbps) Xfinity - Fast up to 1200 Mbps. WOW! - Fast up to 1200 Mbps. Everywhere Wireless - Fast up to 1000 Mbps. RCN - Fast up to 1000 Mbps. Lynx Communications - Fast up to 200 Mbps. T-Mobile Home Internet - Fast up to 182 Mbps.