US business neobanks, built to scale past $250K.

This ranking is for US-incorporated businesses opening their first or replacement operating account: YC-backed and venture-funded startups with a Delaware C-Corp and a need for both an operating account and treasury yield on idle cash; small businesses with 1-10 employees running an LLC or S-corp who file taxes via QuickBooks Online or Xero; e-commerce sellers on Shopify, Amazon, or Etsy who need integrations with payment processors and inventory tools; SaaS founders taking Stripe revenue and paying contractors via ACH; and freelancers with an LLC who have outgrown a personal account and want a proper business EIN-attached checking. Sole proprietors without an LLC can use most of these providers via SSN, but the structural fit narrows to Novo and Bluevine. Non-US founders are served by Mercury and Brex once a Delaware C-Corp or LLC and EIN are in place.

The five-provider shortlist below covers ~95% of the US business-banking neobank market by active customer count. Mercury ranks first for venture-funded startups and higher-balance operating accounts because the IntraFi Sweep network extends FDIC pass-through to $5M across roughly twenty partner banks, the platform offers a Treasury product yielding 4-5% on idle cash, and multi-currency wires are first-class. Brex ranks second for VC-backed teams that want the corporate-card stack and spend-management as the anchor product, with the business account and a comparable sweep program layered on top — the structural answer for any institution with credit underwriting on the funded balance sheet. Bluevine ranks third for SMB-scale operating accounts that prioritise a high-APY checking yield (currently 2.0% on balances up to $250K, distinct from a sweep product) and integrated lending. Relay ranks fourth for owner-operators who run profit-first methodology bookkeeping or need many sub-accounts (it ships up to 20 individual operating accounts under one login, which is unusual). Novo rounds out the five for solo LLCs and e-commerce sellers — its native Stripe, Shopify, QuickBooks, Xero, and Sage integrations are the strongest of any partner-bank provider at the under-$1M revenue tier.

The single most useful fact about US business banking — and the reason Mercury and Brex dominate the venture-funded cohort — is that the FDIC ceiling sits at $250,000 per depositor per insured bank per ownership category, which is structurally insufficient for any operating account holding more than two months of payroll. The mechanism that closes the gap is the multi-bank sweep program: customer balances above the $250K ceiling are automatically distributed across a network of FDIC-insured banks so that no one bank holds more than $250,000 of any one customer's funds. The customer interacts with one Mercury (or Brex) account; the structural protection sits in the sweep network.

Mercury IntraFi uses the IntraFi Cash Sweep network (formerly ICS / CDARS), currently spreading sweep-enrolled balances across roughly twenty FDIC-insured banks in $250,000 buckets — advertised at $5M of pass-through cover, in practice extending further as the participating-bank list grows. Brex Cash Management publishes a similar $6M sweep ceiling across its own member-bank list. Bluevine, Relay, and most other US business-banking fintechs run smaller sweep networks (typically $2-3M ceilings) using either IntraFi or proprietary networks. Three caveats matter when reading the headline cap. First, sweep coverage is conditional on the customer opting in to the program and on no overlap with the customer's existing deposit relationships at the same network banks — double-counting at one IntraFi-member bank zeroes out the second slice. Second, sweep balances earn whatever the network's blended deposit rate is (often lower than the headline rate at any single bank). Third, the participating-bank list changes as banks join or exit — the post-SVB recalibration in March-May 2023 saw most US business neobanks rebuild their sweep networks within days, which is why providers now publish the current member list rather than a stale snapshot.

Mercury Treasury and Brex Cash Management's invested tier are investment products, not deposit accounts. Both hold customer funds in a brokerage account (Mercury via Apex Clearing; Brex via its broker-dealer subsidiary) and invest them in US Treasury bills and money-market funds yielding 4-5% in 2026. Brokerage cash awaiting investment is covered by SIPC up to $500,000 with a $250,000 cash sub-limit — which protects against custodian failure but not against market loss. T-bill yields fluctuate with the federal-funds rate, and money-market funds carry a small but non-zero break-the-buck risk that the FDIC sweep product does not. The right structural answer for most operating balances above $250K is to split: keep payroll-and-near-term-payables at the FDIC sweep ceiling (Mercury Vault, Brex business account) and route only true idle cash to the Treasury product. Confirm the product type before assuming insurance — the FDIC publishes its Electronic Deposit Insurance Estimator at edie.fdic.gov for exactly this reason, and the SEC publishes money-market-fund risk disclosures at investor.gov.

Each bank in this ranking is scored against the same six dimensions used across the worldwide index — regulation (sweep ceiling + sponsor-bank diversity), fees (monthly + transactional), UX (app + onboarding), features (sub-accounts, virtual accounts, wires, ACH, FedNow), Trustpilot, and app-store signal — and re-weighted for the business-banking audience so the sweep ceiling and accounting-integration depth carry proportionally more weight than they do on the consumer index. The full per-dimension methodology is published at /methodology/; the affiliate-disclosure ledger is at /disclosure/. Affiliate status does not change the score. We exclude pre-paid commercial card programs (no FDIC), credit-union business products (NCUA-insured, separate index), crypto-native business wallets (no FDIC on the crypto leg), and branchless-bank divisions of legacy banks (Capital One Spark, Chase Business Complete — multi-decade licences, separate competitive shape).

For a venture-funded US startup with a Delaware C-Corp and an operating balance above $250K, Mercury is the structural fit — the $5M IntraFi sweep, multi-currency wire stack, Treasury product, and YC-cohort network effects make it the default. For a VC-backed team that wants the corporate-card stack as the anchor and is comfortable with credit underwriting on a funded balance sheet, Brex is the structural fit; many startups run both — Mercury for the operating account, Brex for the corporate-card stack. For an SMB that wants high-APY checking on a balance below the standard $250K ceiling and needs lending integrations, Bluevine is the right answer. Relay is the structural fit for any owner-operator running profit-first methodology, multiple sub-accounts, or a multi-entity structure under one login. Novo is the right answer for solo LLCs, e-commerce sellers, and SaaS founders whose accounting stack is the deciding factor (Stripe, Shopify, QuickBooks, Xero, Sage). Confirm your specific protection mechanic before assuming the headline ceiling applies — the FDIC, SEC, and CFPB each regulate a different layer of the stack.