That bit of fintech jargon forms the basis of business for startup Payrailz. The Glastonbury firm provides white-label payment technology to credit unions and banks. The idea is that Payrailz technology allows smaller financial institutions to provide customer services that match — or even beat — those offered by the financial giants. Cash is out; checks are so 20th century. Today, money moves in the cyberspace world, along digital rails designed by firms like Payrailz. The idea for Payrailz emerged in late 2016, explains Mickey Goldwasser, the firm’s vice president of marketing. A group of banks — including Connecticut-based Webster Bank — started talking about using new technology to design a better payment system.