Mercury became startup banking's default when SVB's collapse sent founders searching

Digital banking for startups and e-commerce: accounts, cards and treasury delivered through partner banks Choice Financial Group and Evolve Bank & Trust.

Startup banking could be won with software on partner-bank rails and profitability as trust — so when a giant bank failed, founders would default to Mercury.

$163M raised pre-2023 including a $120M Series B (July 2021; a16z, Coatue, CRV); then a Sequoia-led $300M Series C at $3.5B (March 2025) and a TCV-led $200M Series D at $5.2B (May 2026).

Repeat founder and prolific angel Immad Akhund started Mercury in 2017 because US business banking still felt like it was built against startups. It grew on venture referrals — a $120M Series B in July 2021, more than 100,000 customers by 2022, and profitability through the 2022 fintech winter.

When SVB collapsed on March 10, 2023, Mercury was the obvious place for displaced deposits — and an obvious thing to distrust, being a startup itself. In the first five days Akhund did damage control on calls while the team lifted FDIC pass-through insurance from $1M to $3M, then $5M, and shipped Vault, a T-bill money-market product. More than $2B arrived in days; roughly 8,700 new customers funded accounts in March. The fear was a one-week boom, but 95% of the new customers stayed, monthly signups doubled after April, and ARR had grown 4x year-over-year by May 2023. The later Synapse–Evolve collapse put Mercury under regulatory scrutiny; by 2025 about 20% of the company worked in risk and compliance.

Still private and compounding. Mercury raised a Sequoia-led $300M Series C at $3.5B in March 2025, hit $650M in annualized revenue at the end of Q3 2025 (up from $500M a year earlier) with three consecutive GAAP-profitable years, and closed a TCV-led $200M Series D at $5.2B in May 2026 with more than 300,000 customers.

Trust in startup banking is cyclical: SVB's failure broke the assumption that an incumbent is the safe choice, and search behavior followed the panic within hours.

Mercury's partner-bank model let it raise FDIC coverage to $5M and ship a treasury product in days — speed an ordinary bank couldn't match.

The spike could have been a sugar high; retention became the proof point, with 95% of crisis signups still on the platform 90 days later.

Profitability turned the 'is a startup bank safe?' question into a selling point rather than a liability.

The same rails that won deposits created concentration risk: the Synapse–Evolve fallout showed fintech infra failures land on the front-end brand.

A crisis that validates your category is worth more than any campaign — but only if the product survives the surge. Mercury converted a panic-driven spike into a default choice by keeping 95% of it.

As of September 2026 Mercury remains private, GAAP-profitable for three straight years, at a $5.2B valuation after its May 2026 Series D. Immad Akhund positions the company to bank an expected wave of AI-born startups — 'more founders in the next five years than in the last twenty' — while roughly 20% of employees work in risk and compliance to keep the regulatory side quiet. The company's 2025 growth ran at 40% in customers, and its annualized revenue reached $650M by Q3 2025.