Discover is best known for the orange Discover it cash back card, but its strategic value lies in the networks behind it. The company issues cards and personal loans, takes deposits online through Discover Bank, and runs the Discover network, the PULSE debit and ATM network, and Diners Club International. That combination of lender and network owner is why Capital One paid for it, and why the brand survives as a subsidiary rather than disappearing. The company is headquartered in Riverwoods, Illinois.
Discover makes money two ways. As a bank, it lends to consumers through Discover-branded credit cards and personal loans and earns net interest income on those balances, funded largely by online savings and CD deposits rather than branches. As a network, it earns discount and interchange revenue when merchants accept Discover cards and processing fees when banks route debit and ATM transactions over PULSE. Unlike Visa and Mastercard, which do not lend, Discover keeps both the lending spread and the network economics on its own cards. Interest income on card loans is by far the largest piece.