Mercury Raises $200M at $5.2B Valuation to Become the Default Bank for AI Startups

In the first funding round to directly acknowledge the “AI startup formation boom” as a primary growth driver, Mercury closed a $200 million Series D on May 20, valuing the company at $5.2 billion—a 49% increase from the $3.5 billion valuation it carried just 14 months ago. The round was led by TCV, with participation from Andreessen Horowitz, Coatue, CRV, Sapphire Ventures, Sequoia Capital, and Spark Capital.

The timing is not coincidental. Mercury has positioned itself at the intersection of two compounding trends: the explosion in AI startup formation, which has dramatically compressed the time to launch a venture-backed company, and the persistent inadequacy of traditional banking infrastructure for technology companies. The result is a company that now banks more than 300,000 customers—including one in three U.S. startups—posting $650 million in annualized revenue and four consecutive years of GAAP profitability.

The OCC Charter: From Fintech to Actual Bank

The funding announcement arrived just weeks after a milestone that fundamentally changes Mercury’s regulatory and competitive standing. In April 2026, the Office of the Comptroller of the Currency granted conditional approval for Mercury to establish Mercury Bank, a de novo national bank charter—the first such approval for a startup-focused fintech in years.

The charter, applied for in December 2025, would allow Mercury to operate as a full-service federally regulated bank rather than offering banking services through partner institutions like Choice Financial Group and Evolve Bank & Trust. The practical implications are significant:

Zelle integration: As a chartered bank, Mercury can connect directly to the Zelle payment network, currently unavailable to non-chartered institutions. Zelle processed $806 billion in transactions in 2025, and its availability is a meaningful differentiator for Mercury’s small business and startup customers who transact heavily with other businesses.

Expanded lending: A direct charter enables Mercury to underwrite and hold loans on its own balance sheet rather than originating through partners. Mercury already offers revenue-based financing and venture debt; as a chartered bank, it could offer a broader product suite with better pricing.

Own payments infrastructure: Partner bank dependencies create both cost friction and operational risk. A direct charter gives Mercury control over its ACH, wire, and card settlement infrastructure—reducing per-transaction costs and enabling faster product innovation.

Customer protection: Deposits at Mercury Bank would carry FDIC insurance under Mercury’s own charter rather than through partner bank pass-throughs—a distinction that became commercially relevant after the March 2023 Silicon Valley Bank collapse, when questions arose about the reliability of fintech pass-through FDIC coverage.

AI Startup Formation as a Growth Engine

Mercury’s CEO Immad Akhund has been explicit about what’s driving the company’s accelerating growth: the AI startup boom. The speed at which founders can now build companies—using AI for engineering, customer support, marketing, and operations—has compressed the formation-to-revenue timeline significantly. Mercury reports a 2.5x year-over-year increase in new account applications, with a disproportionate share coming from AI-native companies.

More than 300,000 customers have chosen Mercury, and the company reports that a rapidly growing share of those customers are AI companies—from solo founders building with large language models to Series B companies deploying autonomous agents for enterprise workflows. Mercury’s pitch to this cohort is a combination of developer-friendly APIs, treasury management tools, and financial infrastructure designed for companies that are themselves built on software.

The company’s first in-product AI feature, Mercury Insights, launched in 2025, gives customers a real-time, interactive view of their financial health—burn rate projections, revenue trend analysis, and cash flow forecasting. For a startup founder whose primary job is building product, not managing finances, the ability to query a financial assistant rather than reconciling spreadsheets represents a meaningful quality-of-life improvement.

Four Years of Profitability in a Sector Known for Losses

Perhaps the most striking aspect of Mercury’s trajectory is its financial discipline. The company has delivered four consecutive years of profitability on both GAAP net income and EBITDA bases—a rare achievement in a fintech sector that has historically treated losses as table stakes for customer acquisition. Mercury reached $650 million in annualized revenue as of Q3 2025, and the company is approaching $1 billion in annual revenue run rate as AI startup formation accelerates account growth.

This profitability sets Mercury apart from a generation of fintech challengers that burned through venture capital acquiring customers at unsustainable unit economics. Mercury’s model—charging primarily through interchange revenue, interest income on deposits, and subscription fees for its team and enterprise plans—generates revenue proportional to customer activity rather than subsidizing growth through below-market pricing.

The sustainable economics also put Mercury in a stronger position to pursue the OCC charter. Regulators evaluating bank charter applications scrutinize capital adequacy, management quality, and business model sustainability. Mercury’s four years of GAAP profitability, $200 million fresh capital, and demonstrated ability to build complex financial products without a direct banking license provided a credible basis for the OCC’s conditional approval.

Competitive Positioning

Mercury’s primary competitive territory is the gap between traditional business banking—dominated by JPMorgan Chase, Bank of America, and Wells Fargo, which have historically underserved early-stage companies—and venture debt specialists like Hercules and TriplePoint Capital, which serve funded startups but not necessarily from day one of formation.

The closest competitive analog is Brex, the corporate card and spend management platform that has also served the startup segment aggressively. Brex and Mercury have taken different product paths: Brex has evolved toward expense management and enterprise software for larger companies, while Mercury has deepened its banking infrastructure and lending for startups at earlier stages. The OCC charter could accelerate Mercury’s ability to serve larger companies as they scale—territory where Brex has focused more recently.

SVB’s collapse in 2023 created a gap that Mercury partially filled, as thousands of startups scrambled to open accounts at institutions with less concentrated exposure to a single sector. Mercury grew rapidly in the months following SVB’s failure and has maintained elevated growth since.

What the Funding Is For

Mercury plans to deploy the $200 million toward three priorities: accelerating the buildout of Mercury Bank’s internal infrastructure required by the OCC charter, expanding the lending products enabled by a direct banking license, and continuing international expansion. The company already serves founders and companies in more than 50 countries, though its primary banking infrastructure has been U.S.-focused.

The timing of the round—coming as AI startup formation continues to accelerate and just weeks after a landmark regulatory approval—reflects an investor base betting that Mercury is positioned to be the default financial infrastructure layer for a startup ecosystem increasingly defined by AI-native companies.

“Artificial intelligence is dramatically accelerating the pace at which founders can build companies,” Akhund said in a statement accompanying the announcement. “Mercury was founded to serve that next generation of business builders, and we’re just getting started.”