Monetizing Cash versus Employee Spend

The core divide is that Mercury monetizes idle cash, while Ramp and Brex monetize employee spend. That shapes everything from product design to customer behavior. Mercury wins when startups keep large balances in operating accounts and treasury. Ramp and Brex win when companies route as many purchases, invoices, and travel bookings as possible through their card and spend software, because every extra dollar of volume can create interchange and software revenue.

• Mercury reached an estimated $500M annualized revenue in 2024 on roughly $20B of deposits, with most revenue coming from interest sharing with partner banks. That makes Mercury look more like a modern startup bank with software attached, not a card company with a bank account attached.
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• Ramp and Brex started from the card side. Ramp estimated $1B annualized revenue in August 2025 and Brex $700M in August 2025, with both expanding from cards into bill pay, procurement, travel, treasury, and subscriptions. Those extra products help them turn payment volume into deeper workflow lock in.
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• The practical difference is where each company sits in the customer workflow. Mercury is closest to where cash lands and sits. Ramp and Brex are closest to where money gets approved and spent. That gives Ramp and Brex more daily product touchpoints, while Mercury gets the balance sheet and yield economics.
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Going forward, the lines keep blurring. Mercury is adding more workflow software to defend deposits, and Ramp and Brex are adding treasury and banking features to defend spend. The winning platform is likely to be the one that captures both the cash before it is spent and the workflow that decides where it goes.