Capital One is one of the largest banking corporations in the US. Based in Virginia, it specializes in auto loans, savings and banking accounts, and credit cards. In 2018, it was ranked 10th on the list of biggest banks by assets in the country. It has more than 750 branches and 2000 ATMs. If you are a client of Capital One, then having an online account would make it easier to check your balance and make online payments.