Reviewers mostly praise Mercury for easy setup, a clean interface, and startup-friendly tools like virtual cards, integrations, cash flow features, and simple onboarding. Some users also say payments and navigation work well day to day. But the biggest repeated complaint is reliability: several reviewers report sudden compliance reviews or account closures with little warning, plus support that can take days and feel unhelpful. Makers of
CatDoes also highlight Mercury’s API, while other founders call it useful for contractor payments and foreign founders.