UK based challenger Starling Bank has seen some good success with their banking as a service offering; the company says they have 20 institutional clients signed onto their BaaS platform and payments volume is double month over month; the bank uses APIs to allow clients to get up and running quickly; “How you consume the APIs is very important,” said Julian Sawyer, Starling Bank’s chief operating officer, to TearSheet. “If you are a big company or startup, you’ll get the same service from us. We hope, through our services, that startups become the next big unicorns.”; banking as a service has become a market trend across the world with more firms looking to quickly launch digital banking offerings without having to build themselves; Starling is the first challenger to have this type of offering, though others offer similar services through a marketplace model. Source.