Today, Fundbox’s core product is a revolving line of credit for small businesses. Cash flow is a huge concern for many companies, since they often have to wait for a payment from an invoice to arrive before investing in their next projects or hiring more employees. A revolving line of credit allows companies to flexibly draw down and pay back a loan, while only paying fees on what a company uses. To apply for the loan, companies connect Fundbox to their financial data store (for example, QuickBooks), and Fundbox slurps in the data and offers a credit decision in as fast as minutes. Companies can then tap their line of credit almost immediately and use it as working capital. As invoices are paid, companies can then pay off their line of credit and stop paying fees.

https://techcrunch.com/2019/09/24/fundbox-raises-176-million-series-c-to-build-visa-for-b2b-payments/