Best online banks to replace Mercury for startups in 2026

Startups that moved away from Mercury in 2026 point to four main limits: an FDIC sweep that covers about $5 million, a $250,000 minimum to access Mercury’s treasury yields, no option for cash deposits and no native stablecoin custody. Mercury continues to serve more than 300,000 businesses and remains widely used by early-stage companies because it has no revenue minimum, no personal guarantees and fast self-serve onboarding.

Rho presents itself as an upgrade for companies that need broader finance operations and larger sweep coverage. The company combines business checking, corporate cards, accounts payable tools and treasury services. Public disclosures show a sweep network that can cover balances reported up to roughly $75 million and advertised treasury yields of about 4.57% as of August 2026. Rho does not accept cash deposits and its platform is tolerant of crypto customers without holding stablecoins directly.

Brex completed acquisition by Capital One on April 7, 2026. The platform reports insured sweep coverage up to around $6 million and invested-cash yields in the mid-3% range. Brex introduced native USDC payments in September 2025 to enable on-chain receipts converted automatically to dollars. Company eligibility requirements reported in public materials commonly include roughly $400,000 in monthly revenue or venture backing, which excludes many smaller businesses.

Ramp focuses on expense and procurement management that sits on top of an existing bank account. Ramp added stablecoin accounts to its offering in July 2026, providing USDC and USDT custody through a third-party custodian. Ramp’s disclosures state stablecoin balances are not FDIC-insured. The platform uses partner banks for checking and is not available to businesses in New York.

Grasshopper operates as an OCC-chartered national bank and an FDIC member. Deposits are insured at the bank itself rather than routed through a partner model. Grasshopper publishes tiered yields on checking and money market products, including a money market paying about 3.00% APY above $25,000 and lower tiers beneath that. The bank is USD-only, does not serve non-US-incorporated entities and does not support Zelle.

Bluevine accepts sole proprietorships and unincorporated businesses and supports physical cash deposits at more than 90,000 retail locations. Bluevine advertises checking APYs up to roughly 3% and offers small-business lines of credit and standard accounting integrations. The company does not offer native stablecoin custody.

Airwallex targets companies with multi-currency revenue and international payouts. The payments provider holds balances in more than 20 currencies and offers local receiving details in over 70 countries. Airwallex reports FX spreads around 0.5% above interbank for major currency pairs and launched a yield product paying up to about 3.44% APY on idle USD balances in March 2026. US deposits are routed through partner banks.

Novo provides simple mobile-first business checking aimed at solo operators and micro-businesses. It offers free checking, no minimum balance and ATM fee refunds. Novo does not offer a treasury product, has limited sweep coverage and does not custody stablecoins.

Industry documents and company disclosures show most of these alternatives are fintech platforms that place deposits at partner banks rather than operating under a single chartered bank; Grasshopper is the exception. Stablecoin balances held in crypto accounts are generally not FDIC-insured and custody arrangements vary by provider. Reported yields, sweep ceilings and eligibility criteria differ across filings and change frequently. Migrating payroll, vendor ACH details and card programs between providers can take weeks, and many companies add a second platform while keeping Mercury as a primary account.