Mercury Unbundled Silicon Valley Bank

SVB’s collapse showed that startup banking had already become a software market before it became a bank run. During COVID, founders got used to opening accounts, moving money, issuing cards, and handling treasury online, which let Mercury and Brex peel away the basic operating layer while SVB kept the relationship heavy products like lending and wealth management. Once fear hit in March 2023, deposits moved to the faster interfaces that were already in place, and Mercury alone absorbed more than $2B in a week.

• Mercury and Brex won first on access, not just on price. Mercury was built for startups that SVB often underserved, including smaller, bootstrapped, and non venture backed companies, with online signup and remote operations instead of banker led onboarding.
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• The key product difference was balance sheet risk. SVB took deposits onto its own balance sheet and invested them. Mercury mostly acts as the software layer, earning revenue share on swept deposits, interchange, wires, FX, and venture debt, while partner banks hold the deposits and spread them across banks for higher FDIC coverage.
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• The fallout split the category. Mercury doubled down on being the operating account and treasury hub for startups, while Brex used the same deposit surge to support a broader mix of banking, cards, and finance software. By 2024 and 2025, Mercury was leaning bank account first, while Brex and Ramp were fighting more around spend management and SaaS.
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Going forward, startup finance keeps moving toward a neo SVB built in software pieces. The winners will be the products that hold the operating account, because that account becomes the control point for treasury, cards, bill pay, lending, and eventually the rest of the back office. SVB’s unwind accelerated that shift by years.