An ISP (Internet Service Provider) is a company that provides access to the internet to both personal and business customers. ISPs make it possible for their customers to surf the web, shop online, conduct business, and connect with family and friends—all for a fee. ISPs may also provide other services, including email services, domain registration, web hosting, and browser packages. An ISP may also be referred to as an information service provider, a storage service provider, an internet network service provider (INSP), or any combination of these three based on the services offered by the company.

A WiFi provider, on the other hand, is a company that provides wireless internet access to customers through a wireless network. The main difference between an ISP and a WiFi provider is that an ISP provides access to the internet often through cable, digital subscriber line (DSL), fiber, or satellite connections. ISPs, such as AT&T or Verizon, can be wired to a location such as a home or an office building directly. By contrast, WiFi providers use wireless technology to provide internet access to devices within a certain range.

In summary, an ISP provides access to the internet, while a WiFi provider provides wireless internet access to devices within a certain range.