San Francisco-based Stripe Inc. debuted Stripe Capital to provide financing for its small business customers. Stripe joins Square Inc. (NYSE: SQ) and PayPal Inc. (NASDAQ: PYPL) in offering such a service. Having insight into a merchant’s cash flow also allows Stripe, Square and PayPal to make financing offers and approvals quickly compared to the weeks and months a traditional bank can take to approve a small business loan. Those advantages have other fintechs handling payments pondering whether to add lending to their services.