Mercury Is Your Bank. Olina Is Your Cash Flow.

The short version: Mercury is best-in-class business banking — free checking and savings, big FDIC coverage, free wires, and a simple 1.5% cashback card. It's where your money lives. Olina is a cash-flow platform for ecommerce and DTC brands — it changes when eligible ad and operating bills leave, smoothing them into small daily payments. Mercury doesn't touch the timing of your bills; Olina does. This is one of the most complementary pairings in the category: keep Mercury as the bank and add Olina when more predictable outflows and usable cash would help the brand grow.

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• At a glance · Bank vs cash-flow layer · Where Mercury is the answer · Pricing · Where each wins · Who should choose · Use both · FAQ · How Olina works

TL;DR

These aren't competitors so much as two different layers. Mercury is a bank (technically a fintech, now with a conditional national bank charter) — the default operating account for a huge share of DTC brands, with no monthly fees, up to $5M of FDIC coverage, free USD wires, treasury, and a 1.5% cashback charge card settled from your balance. It's a fantastic place to hold and move money. But Mercury's card is a charge card — a big ad or vendor bill still hits your balance in full, on its date. Olina is a cash-flow platform. It sits on top of the bank you use — Mercury included — and reshapes when eligible bills leave: the Ad Flex Card pays down with a brand-selected share of daily revenue, while Budget Bills turns recurring operating categories into a steady daily payment. Mercury answers "where should my money live?" Olina answers "how can I make large outflows predictable and keep more cash available between due dates?" Keep Mercury; add Olina where payment timing is the constraint.

At a glance

A bank vs a cash-flow layer

Mercury is where your money lives. It's the cleanest free business bank most DTC brands will find — no monthly fees, no minimums, free domestic and international USD wires, up to $5M of FDIC coverage through its sweep network, treasury, invoicing, and a tidy 1.5% cashback card. If you want a modern operating account that just works, Mercury is a great answer (and with a conditional national bank charter granted in 2026, it's on its way to being a bank in the full legal sense, not just a fintech).

Olina is how your bills leave. It doesn't hold your money or replace your bank — it sits on top of Mercury and changes the timing of eligible marketing and operating bills. The Ad Flex Card uses a brand-selected share of daily revenue to pay down card-billed ad spend, while Budget Bills turns recurring 3PL and other operating categories into a predictable daily amount.

Here's the key thing Mercury doesn't do: its card is a charge card settled from your balance. That's great for clean books and 1.5% back, but it means a big bill still lands on your balance in full, the day it's due. Cashback improves the return on spend you already make; payment flexibility can matter more when usable cash or card capacity is limiting profitable growth. Olina reports that Ad Flex Card customers spend 33% more on ads with that flexibility; that attributed result is not guaranteed, and more spend creates value only while marginal campaigns remain economically sound. That's why the two fit together so cleanly.

Where Mercury is the answer (not Olina)

If you need any of the following, that's Mercury's job, and it's excellent at it —

• A business bank account: free checking and savings, up to $5M FDIC, free USD wires, no monthly fees or minimums
• A simple rewards card: 1.5% unlimited cashback, no annual fee, and no personal guarantee for qualified startups
• Treasury / yield on idle cash, plus invoicing and clean accounting integrations (QuickBooks, Xero, NetSuite)
• A place to actually hold and move your money — which Olina, by design, is not

Olina isn't a bank and isn't trying to be. It's a cash-flow tool, full stop.

Pricing

Olina — The Ad Flex Card carries 0% interest. Ad Invoices, Budget Bills, and Pure Drip use a flat fee, and Olina offers monthly plans. Check current pricing against the bill and term you plan to use.

Mercury — $0 monthly fees, no minimums, free domestic and international USD wires; the IO card has no annual fee and earns 1.5% unlimited cashback. Mercury makes its money on interchange, treasury, and paid tiers — banking itself is free.

Where each one wins

Where Olina wins

• Actually changes when eligible bills leave — the Ad Flex Card pays down with a selected share of daily revenue, while Budget Bills turns repeated operating categories into predictable daily payments
• Gives any remaining Ad Flex balance Net-45 treatment at 0% interest; daily paydown can reduce or eliminate that later balance, but a remainder may still be due
• Works on top of Mercury (or any bank) — nothing to switch
• Built for growth-focused ecommerce and DTC brands that value usable cash and predictable outflows

Where Mercury wins

• The cleanest free business banking around — no fees, up to $5M FDIC, free USD wires
• 1.5% unlimited cashback, no annual fee, no personal guarantee for qualified startups
• Treasury yield, invoicing, and tight accounting integrations
• A real, trusted home for your money (now with a conditional national bank charter)

Where each falls short

• Mercury, for cash flow: its card settles from your balance, so a big bill still lands in full on its date — Mercury doesn't change the timing
• Olina: it doesn't replace a bank and does not offer deposit accounts, yield, or a rewards-first card; bills remain subject to approval and product terms

Who should choose which

Choose Mercury if you... need a great free business bank account; want simple 1.5% cashback with no personal guarantee; want treasury, invoicing, and clean accounting sync; just want a trustworthy place to hold and move money.

Choose Olina if you... already have a bank (maybe Mercury) and want eligible ad and operating bills to leave predictably; want to keep more cash available for inventory or profitable campaigns; want Ad Flex Card spend paid down from daily revenue with Net-45 treatment on any remainder; or want recurring bills handled through Budget Bills without switching banks.

You can use both

This is the easiest "use both" in the category, because the two don't overlap much. Mercury holds your money; Olina smooths eligible bills. Bank with Mercury for the free accounts, the FDIC coverage, and its 1.5% card on suitable general spend; use the Ad Flex Card for supported ad spend when payment flexibility matters, and Olina's invoice products for eligible operating bills. Mercury makes money easy to hold and move; Olina makes selected outflows predictable.

How Olina actually works

Olina is a cash-flow platform for ecommerce and DTC brands. Its Ad Flex Card and Ad Invoices products cover advertising spend, while Budget Bills and Pure Drip turn supported operating invoices into daily repayments. It works alongside the bank you already use — Mercury included — across four products:

• Ad Flex Card — for eligible ad spend paid by card. You select a daily-revenue paydown percentage; any remaining balance receives Net-45 treatment at 0% interest. Daily paydown can reduce or eliminate the later balance, but a remainder may still be due.
• Ad Invoices — for approved advertising-platform invoices. Olina pays the invoice and you repay it in small daily installments across 45 days.
• Budget Bills — for repeated operating categories. Establish a monthly budget for expenses such as 3PL, shipping, freight, customs, or repeated inventory buys; Olina pays eligible bills as they arrive and combines them into one steady daily amount.
• Pure Drip — for one sporadic approved invoice. A PO, inventory, tariff, freight, packaging, fulfillment, or 3PL bill can be repaid in equal daily amounts over Net 30 or Net 45. It is not unrestricted cash or six-month inventory financing.

The Ad Flex Card carries 0% interest; the other products use a flat fee, and monthly plans apply. If a 3PL charges about 3% to pay by card, compare that with your applicable Olina terms: Olina may cost materially less — sometimes roughly half — while also providing more payment time and predictable daily repayments.

Olina vs Mercury FAQ

Is Olina a bank like Mercury? No. Mercury is where your money lives — checking, savings, a card. Olina is a cash-flow tool that works on top of the bank you already use. Keep Mercury; add Olina to smooth the bills.

Does Mercury smooth my bills like Olina? No. Mercury's card settles from your balance, so a big ad or vendor bill still lands in full on its date. Olina's eligible products turn selected ad and operating expenses into daily repayments; any Ad Flex remainder still follows its Net-45 terms.

Should I switch from Mercury to Olina? No — they do different things. You don't replace Mercury with Olina; you keep Mercury for banking and add Olina for cash-flow timing.

Does Olina earn cashback like the Mercury card? The Ad Flex Card is built around payment flexibility rather than cashback. Mercury's 1.5% is a real benefit on spend you can comfortably settle; Olina can be more valuable when smoother timing and usable capacity let a brand keep funding profitable growth.

Can I use Olina and Mercury together? Yes — when payment timing or usable capacity is an actual constraint. Bank with Mercury, and use Olina on top for eligible ad and operating bills where daily repayments create useful operating room. If Mercury's normal payment schedule already fits the business, Mercury may be sufficient on its own.

The takeaway

Mercury is your bank; Olina is your cash flow. Mercury is a superb, free place to hold and move money, with a clean cashback card. But it doesn't change when a big bill leaves — that bill still lands on your balance in full. Olina adds that timing layer across ad spend and eligible operating invoices, helping a healthy ecommerce brand keep more cash available and invest on business economics rather than bill dates. Keep Mercury. Add Olina where smoother outflows create useful operating room.

Also read: Best cash-flow tools for ecommerce · Olina vs Ramp · Olina vs Highbeam Stop letting one big bill dictate your month. Start with one bill or see pricing.