Chime, a fintech company, teams with The Bancorp Bank and Stride Bank to provide certain fee-free mobile banking services.

Croud has been charged with increasing brand visibility in the U.S. by diversifying its media reach and creatively leveraging social channels to drive growth.

Kris Tait, managing director U.S., Croud, said: "Our shared innovation-first mindset coupled with the fact that Chime is willing to place big bets on media and partnerships as they power their brand forward, makes this an incredible match.”

Chime claims engagement rates nearly three times the standard for financial services.

The agency's work has included Audible, Vans, IWG and AllSaints.