Reviewers mostly praise Mercury for a clean, simple interface, easy setup, and startup-friendly features like virtual cards, integrations, and cash flow tools. Several users say it works well day to day, though views on support are mixed: some call the team helpful, but repeated complaints describe slow email-only responses, low card limits, and delays on reviews or approvals. The sharpest criticism is about reliability and compliance, with multiple users reporting sudden account restrictions or closures with little warning. Makers of
CatDoes also highlight its API for bank-account and transaction access.