Mercury is a fintech platform that offers online business banking services for startups, small businesses, and scaling companies. It provides a single account for payments, invoicing, expense cards, and accounting tools. What sets Mercury apart is its rapid onboarding—applications can be completed in ten minutes—and its focus on automation, team management, and high‑yield savings. The service is backed by FDIC‑insured partners and offers no‑fee USD transfers and credit card rewards.