Mercury

Mercury is a financial stack for startups and technology-led companies, combining business checking and savings accounts, card products, payments, cash management and finance operations tooling in a single online platform. It launched in 2017 and built its reputation on two things: no monthly fees and no minimum balance requirement for its core accounts, and an interface designed for founders and finance teams who would rather not talk to a bank branch. The companies it serves best are venture-backed startups, bootstrapped software businesses, e-commerce operators, agencies and holding companies with multiple subsidiaries, most of them incorporated in Delaware or another US state and operating largely online.

The regulatory position has to be described accurately, because it is the source of most confusion about the product. Mercury is not a bank. It is a financial technology company whose banking services are provided by partner banks that are members of the Federal Deposit Insurance Corporation, and its card products are issued by those partner institutions under licence from the card networks. Deposits held in Mercury accounts are FDIC-insured up to the applicable limits through those partner banks. This structure is common across the fintech category and it explains why account documentation names third-party institutions and why certain products, such as insured cash sweep arrangements, work by distributing balances across a network of programme banks to extend coverage beyond the standard per-bank limit.

Account structures are the foundation. A company can open multiple checking accounts within one Mercury relationship and give each a purpose, such as operating, payroll, taxes and marketing, which makes budgeting visible without opening separate bank relationships. Savings accounts pay interest and can be organised the same way. Mercury also offers an insured cash sweep product that spreads deposits across partner banks to increase FDIC coverage, and a treasury product that invests idle cash in money market funds for companies with larger balances and a longer cash runway. Each of these has its own minimums and eligibility conditions, which vary by product and have changed over time.

Payments cover most of what an operating company needs. Domestic wires and ACH transfers are free and unlimited, which is the single most cited reason startups move to Mercury, since traditional banks often charge per outgoing wire. International wires are supported in many currencies at rates that are generally more favourable than a retail bank's, though a fee applies and the amount depends on currency and destination. Bill pay lets a company schedule and approve vendor payments, and Mercury can issue checks and pay by card where a vendor requires it. There is no support for depositing physical cash, which is a hard constraint for cash-heavy businesses.

Cards include virtual and physical debit cards tied to the checking accounts, with per-card spending limits, the ability to lock or close a card instantly, and integration into the wider expense workflow. Mercury also offers a business credit card that underwrites against the company's financial position, with no annual fee and cash back on spend. Because credit limits are set from company data rather than a personal guarantee, eligibility depends on cash balance, revenue and runway, and early-stage companies without meaningful balances may not qualify or may receive modest limits.

Finance operations tooling is where Mercury differentiates from a neobank that only offers accounts. Multi-user access comes with granular permissions, so a bookkeeper can view and categorise transactions without being able to send money, and an approver can release payments above a threshold. Approval workflows can require more than one signature for transfers over a defined amount. Accounting sync pushes transactions and receipts into QuickBooks Online and Xero, and Mercury's own categorisation reduces the manual coding burden. Audit logs record who did what and when, which matters as soon as a company has a board, an auditor or an acquisition on the horizon.

Mercury also addresses the funding side of a startup's finances. It maintains relationships with venture lenders and can introduce companies to debt facilities, and its treasury management is designed for the specific problem of a large funding round landing in one account. For a company that has just raised, spreading deposits across insured programme banks and earning yield on the remainder is a practical risk control rather than an investment strategy.

Commercial terms are the most attractive part of the proposition for many buyers. There is no monthly fee for the core business accounts, no minimum balance to keep the account open and no charge for domestic wires or ACH. Fees apply to international wires, certain expedited transfers and specific products. Mercury's revenue comes from interchange on card spend, from fees on international payments and from the spread on cash management products. Where a minimum balance or a fee does apply, it attaches to the optional treasury and sweep products rather than to basic banking, and the current figures for those products should be confirmed on Mercury's own pricing page because they are revised as interest rates and partner terms change.

Against Brex and Ramp, Mercury is banking-first rather than card-first. It offers real deposit accounts, free domestic wires and cash management, and its card and expense features are lighter than what those two platforms provide. Many companies run Mercury as their bank and Brex or Ramp as their spend platform, which is a combination both vendors tacitly accept. Against a traditional bank such as Silicon Valley Bank or a regional commercial bank, Mercury is cheaper, faster to open and better integrated with accounting software, but it lacks branches, lacks relationship-based lending and lacks the depth of treasury services a large company needs. Against other fintech banks such as Relay, Mercury is stronger on venture-scale cash management and weaker on features aimed at smaller cash-based businesses.

The limitations are worth listing before signing up. Mercury requires a US business entity in most cases, and it does not accept sole proprietorships without a registered company. It declines or restricts certain industries, including adult content, gambling, cannabis, some cryptocurrency activity, money transmission and other high-risk categories. There is no cash deposit capability and no branch access. Credit products are limited and are not a substitute for a bank line of credit. Support is digital-first, and while it is generally well regarded, there is no in-person escalation path. Account opening involves identity and beneficial ownership verification that can take days when documentation is incomplete, and accounts can be closed if activity falls outside the acceptable use policy.

Mercury fits US-incorporated startups, software companies, e-commerce businesses, agencies and holding companies that operate online, move money by wire and ACH frequently, and want free domestic transfers plus multi-user controls with accounting sync. It does not fit sole proprietors, businesses in restricted industries, cash-heavy retailers, companies that need branch banking or traditional commercial lending, and non-US entities without a qualifying structure. When comparing alternatives, Mercury is the strongest choice for a startup's primary operating bank, Brex and Ramp are the stronger choices for card controls and spend management on top of it, and a traditional commercial bank remains necessary once a company needs credit facilities, treasury services at scale or in-person relationship banking.