The Quick Verdict
Mercury and Relay are both excellent free business banking platforms — neither is a bank itself; both run on partner banks — but they’re built for different people. Pick Mercury if you’re running a startup or digital business with complex payment flows, APIs, and larger balances. Pick Relay if you’re a freelancer or agency owner who wants to split cash across separate accounts for taxes, payroll, and operating expenses.
That’s the real difference: Mercury optimizes for startup infrastructure; Relay optimizes for cash-flow clarity. Let’s get specific.
Note: neither of these is a licensed bank — they’re fintech platforms with banking services provided by FDIC-member partner banks. Rates and features change; confirm current terms on mercury.com and relayfi.com before opening.
Head-to-Head Comparison (2026)
| Feature | Mercury | Relay |
|---|---|---|
| Monthly fee | $0 (Plus from $29.90/mo annual or $35/mo; Pro $299/mo annual) | $0 Starter (Grow $30/mo; Scale $120/mo) |
| Checking accounts | Multiple accounts, sub-accounts | 20 on Starter, 50 on Scale — each with its own account and routing number |
| Savings | Mercury Treasury (requires $250K+ across accounts; variable yield up to 3.81% as of July 2026, SIPC-protected) | Savings accounts earning variable APY — roughly 1.2% Starter, 1.9% Grow, 3.2% Scale |
| Domestic wires | Free | Incoming free; outgoing from $5 (free on Grow) |
| International wires | Free USD international wires | $10 each way on Pro plans |
| Cash deposits | Not supported | Yes — select Allpoint+ ATMs and Green Dot retail locations |
| Debit cards | Virtual and physical cards | Up to 50 Visa debit cards with per-card spending controls |
| ATM access | Unlimited domestic ATM fee refunds | 50,000+ Allpoint ATMs |
| FDIC insurance | Up to $5M via sweep network (IntraFi) through partner banks | Up to $3M via sweep through Thread Bank |
| Accounting integrations | QuickBooks Online, Xero, NetSuite | QuickBooks Online, Xero, Gusto |
| Credit/lending | Mercury IO corporate cards; venture debt via Mercury Lending | No credit card; AP automation on Grow plan |
| SSN required | No (EIN works for businesses) | No |
| Cash-flow tools | Bill pay, API capabilities | Automated percentage-based allocation to separate accounts |
Where Mercury Wins
Zero-cost wires. Free domestic and free USD international wires are genuinely rare. If you pay contractors abroad or receive international payments regularly, Mercury saves you $10–$50 per transfer versus competitors.
Startup-grade tooling. Mercury was designed for funded startups: an API for programmable banking, Mercury IO corporate cards, venture debt access through Mercury Lending, and Treasury for companies sitting on $250,000+ in cash. If your business looks like a startup — even an un-funded one with complex operations — Mercury’s tooling fits.
Higher FDIC coverage. The up-to-$5M sweep coverage is the highest in this category. If you keep large balances, that’s a real safety margin.
Better yield at scale. Treasury rates ran up to 3.81% annually as of July 2026 for the largest balances. The catch: it requires $250,000 across your Mercury accounts, and balances are held at a clearing partner (SIPC-protected, not FDIC-insured).
Where Relay Wins
Cash-flow segmentation is its superpower. Twenty separate checking accounts on the free Starter plan — each with its own account and routing number — is unmatched. Profit First-style freelancers can run separate accounts for taxes, operating cash, payroll, and profit, with automatic percentage-based allocation shuffling money between them on the paid plans.
Cash deposits. Freelancers who still touch cash — contractors, event vendors, service businesses — can deposit at Allpoint+ ATMs and Green Dot locations. Mercury doesn’t support cash deposits at all.
Savings APY on every plan. Unlike Mercury (no APY on checking; Treasury gated behind $250K), Relay pays a variable APY on savings from the free plan up. Reserved tax money can earn while it sits.
Card-level controls. Up to 50 debit cards with spending limits per card is genuinely useful for small teams and agencies — hand a card to a contractor with a $500 cap instead of sharing one card with full access.
The Freelancer’s Decision
Here’s how I’d actually decide:
Choose Mercury if: you invoice internationally and want free wires, you run a digital business with API or automation needs, you keep large balances (that $5M sweep coverage matters), or you’re in the startup world and want venture-debt and corporate-card infrastructure in the same place.
Choose Relay if: you’re a freelancer, consultant, or agency owner who thinks in envelopes — taxes here, payroll there, operating cash over there — you want savings yield without a quarter-million-dollar balance, or you ever need to deposit cash.
For the typical solo freelancer earning $50K–$150K a year, Relay’s free Starter plan usually fits better: the account separation replaces a spreadsheet habit that most freelancers never sustain, and nothing about Mercury’s startup tooling matters to you yet. For a scaling agency with international contractors and growing balances, Mercury’s free wires and higher coverage pull ahead.
What About the Fine Print?
A few things to know before you open either:
- Account opening is remote for both — no SSN required for businesses with an EIN. That also makes both solid options if you’re opening US business banking from abroad; get the entity and EIN steps done first.
- Both are fintech platforms, not banks. Your deposits are held by partner banks and covered by FDIC pass-through insurance up to the stated sweep limits, subject to conditions.
- APY is variable. The Relay savings rates and Mercury Treasury yield cited above move with the market — check the current numbers before you compare.
- Business accounts don’t do personal banking. If you need a personal account too, don’t mix funds — co-mingling is the fastest way to pierce your LLC’s liability shield.
Related: PayPal Business vs Stripe Fees for Freelancers (2026) · Best Business Checking Accounts for Freelancers (2026)
Official source: Mercury · Relay
Frequently Asked Questions
Is Mercury or Relay better for freelancers?
Relay, for most freelancers. Its free Starter plan includes 20 separate checking accounts with automated allocation — ideal for splitting taxes, expenses, and profit — plus savings APY and cash deposits. Mercury is stronger for startups and businesses with international wires and large balances.
Is Mercury really free?
The core Mercury account has no monthly fee, and domestic plus USD international wires are free. Paid plans start at $29.90/month billed annually (Plus) and $299/month billed annually (Pro) for extra features like advanced permissions and higher support priority.
Is Relay really free?
Yes — the Relay Starter plan has no monthly fee and includes 20 checking accounts, 2 savings accounts, and debit cards. Grow ($30/month) and Scale ($120/month) add more accounts, higher savings APY, and AP automation.
Do Mercury or Relay require an SSN?
No. Both can open business accounts for entities with an EIN. This makes both workable options for non-resident business owners with US entities — though exact documentation requirements vary, so verify during signup.
Which has better FDIC insurance?
Mercury offers up to $5M through its sweep network; Relay offers up to $3M through Thread Bank’s deposit sweep. Both exceed the standard $250K limit via multi-bank sweeps, and coverage is pass-through insurance subject to conditions.
Can I use Mercury or Relay for cash deposits?
Relay yes — at select Allpoint+ ATMs and Green Dot retail locations (small fees may apply at Green Dot). Mercury does not support cash deposits at all.