Does anyone know the number of banks that offer traditional banking services only via internet?

It would be difficult to quantify. However, if you Google "online banks," you should be able to get several that may fit your needs.

i need an answer because according to the instructor he said that it would take time to research it, but i can't seem to find it. that is why i'm here, trying to figure out. i already searched through journals and even on google, but cna't find it, thanks anyways