In the current low-interest rate environment, many financial firms are struggling to grow top-line revenue -- this has not been the case at Discover Financial Services (NYSE:DFS) and Capital One (NYSE:COF). Since the financial crisis, both companies have consistently grown revenue and outpaced the broader market. 

Despite their recent successes, both companies appear to have long growth runways and may present investors with an opportunity to ride the growing trend from a cash-based global economy to electronic. In this video, Motley Fool financial analyst David Hanson discusses these two companies and why recent returns shouldn't deter investors from looking into these stocks.

David Hanson has no position in any stocks mentioned. You can follow David on Twitter. The Motley Fool recommends MasterCard and Visa. The Motley Fool owns shares of Bank of America and MasterCard. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.