Banking has stayed oddly consistent while everything around it has moved on. You still deposit money, move it around, and rely on external tools to understand what it all means. For founders running modern companies, that gap shows up in the small moments that slow everything down: reconciling transactions, exporting spreadsheets, and trying to connect financial data that never quite sits in one place.

It’s not that banks don’t work. It’s that they don’t really help you think.

Why Mercury started in 2017

Mercury was founded in 2017 with a simple frustration at its core. If money sits at the center of every business decision, why does banking stop at storage and transfers? The goal was to build something that understands context, not just balances. Something that behaves less like infrastructure you occasionally visit and more like a system that actively helps you run a company.

That idea has become more relevant as companies themselves have changed shape, especially with AI lowering the barrier to starting something new.

The $200M Series D and what it signals

Mercury is now announcing a $200 million Series D at a $5.2 billion valuation, led by TCV, alongside returning investors including Andreessen Horowitz, Coatue, CRV, Sapphire Ventures, Sequoia Capital, and Spark Capital.

The timing matters. Company formation is accelerating again, driven by AI tools that make it easier to go from idea to product. Mercury reports a significant increase in applications, alongside a broader shift in who is starting companies and how quickly they move from concept to incorporation.

A customer base that no longer fits one category

Mercury now serves more than 300,000 customers, including roughly one in three U.S. startups. But the more interesting shift is outside the startup world.

A majority of new customers now come from outside traditional tech. Ecommerce businesses, service firms, solo operators, and hybrid income profiles are all using the same infrastructure. Banking, in that sense, is no longer a “startup tool.” It’s becoming general-purpose financial operating infrastructure.

From account to operating layer

Over the past year, Mercury has started to evolve beyond being a place where money sits.

Mercury Insights brings real-time financial visibility directly into the product, removing the need for external reporting tools. Developer-focused capabilities like MCP and CLI extend banking into environments where technical teams already work. Payroll is being integrated through the acquisition of Central, and Mercury Personal expands the same experience into individual finances for qualifying users.

The direction is subtle but important. The product is shifting from passive visibility to active participation.

AI changes the interface, not just the tooling

The next step is Mercury Command, an AI-native interface designed to reduce the friction between intent and execution. Instead of navigating dashboards or stitching together financial workflows manually, users will be able to describe what they want in natural language and have it executed inside their account.

Check cash position. Move funds. Categorize transactions. Send invoices. The key difference is that everything remains grounded in real account data, and every action still requires explicit user approval. AI becomes an interface layer, not an autonomous operator.

Moving closer to becoming a full bank

Alongside product expansion, Mercury is progressing on a more structural shift. The company has received conditional approval from the OCC to establish Mercury Bank, N.A., moving it closer to becoming a fully regulated national bank.

Further approvals from the FDIC and Federal Reserve are still required, but the direction is clear: deeper ownership of the financial infrastructure behind the product. That unlocks capabilities like expanded lending, payments, and integrations that are harder to build on top of legacy banking systems.

Key takeaways

• Mercury raises $200M Series D at a $5.2B valuation led by TCV
  
  
• AI is accelerating company formation and expanding the pool of founders
  
  
• Banking is shifting from passive storage to active financial operating infrastructure
  
  
• Mercury is broadening beyond startups into a general business banking platform
  
  
• The company is moving toward full bank status with OCC conditional approval

If you are building in payments or scaling a financial product, this shift is worth paying attention to. Reach out if you want to explore how infrastructure choices shape growth.