Central Payroll Got Acquired.
Now What?

Today, Mercury announced the acquisition of Central, an AI payroll startup from Y Combinator's S24 batch. If you're a Central customer, this post is for you.

We have a unique perspective on this story. Central's CEO signed up as a Warp customer in March 2023, months before Central launched. They used Warp for payroll for about six months, asked detailed questions about how we handle tax compliance, state registrations, and multi-state filings, then left and launched a product with near-identical positioning. We wrote about this in more detail on LinkedIn and Twitter today, including side-by-side comparisons of our website copy and theirs.

But this post isn't about that history. It's about what happens next for companies running payroll on Central, and what to think about when your payroll provider changes hands.

When Capital One acquired Brex for $5.15 billion, it was buying a company with 25,000+ customers, hundreds of millions in revenue, and a platform that would continue operating as a standalone division. The CEO stayed on to run the business. That's a strategic acquisition.

When a $3.5 billion company acquires a seed-stage startup, the dynamics are different. This is what the industry calls an acqui-hire: the acquirer is primarily buying the team, not the product. Central was a small team that had been operating for about two years. They didn't raise a follow-on round. They're now Mercury employees.

Mercury has done this before. In September 2024, they acquired Teal, a seed-stage accounting startup. Immad Akhund described Teal's team as bringing “talent, technology, and expertise” to Mercury. The Teal founder became Mercury's head of accounting products. Eighteen months later, Mercury's accounting capabilities are a feature inside their banking platform, not a standalone product. Teal as a product essentially ceased to exist.

Central customers should expect a similar trajectory. The founders who built your payroll product are now working on Mercury's priorities, not yours.

Will Central remain a standalone product? Mercury's Teal acquisition suggests the more likely path is integration into Mercury's platform. If you're not a Mercury banking customer, what does that mean for your access?

Who is accountable for your payroll?The people who built Central are now Mercury employees. Are they dedicated to payroll, or are they being deployed across Mercury's product org? Payroll requires dedicated, ongoing attention. Tax rules change every quarter. State agencies update their systems. If the team's focus shifts, the product's reliability follows.

Will Mercury invest in deep tax compliance? Payroll tax compliance in the US means working with 800+ state and local tax agencies, most of which have no API access. It requires automated filings, state registrations, notice resolution, and continuous monitoring across every jurisdiction where your employees work. This is the hardest part of payroll to build and the easiest part to deprioritize inside a larger company.

What's the support model? Central was a small team where you could probably reach someone quickly. Mercury serves 200,000+ businesses. What does payroll support look like inside that organization?

What happens if you're not on Mercury banking? If Mercury's long-term play is integrating payroll into their banking platform, companies that don't use Mercury for banking may find themselves as second-class citizens. This is worth understanding now.

Central's story fits a pattern we've seen play out repeatedly. A team identifies that payroll and compliance are broken. They're right. They build a product that addresses the surface-level pain. They gain some traction. But the depth of compliance infrastructure required to serve companies reliably across all 50 states, hundreds of local jurisdictions, and thousands of tax agencies eventually exceeds what a small team can sustain. The product either stalls, gets absorbed, or retreats to a narrower market.

This happens because payroll compliance is a compounding problem. Every quarter, tax rules change. New jurisdictions create new requirements. State agencies update their systems, or more often, don't. The infrastructure needed to stay current across all of this isn't something you build once. It's something you invest in continuously, and it requires a company that treats it as the core product.

When payroll becomes a feature inside a banking platform, the incentives shift. It's rational for the parent company to invest more in the products that drive their core business and less in the deep, unglamorous compliance work that makes payroll reliable.

Warp is a payroll and employee management platform. That's the whole company. Not a feature inside a banking app. Not one of twenty products.

We automate tax compliance across 800+ US tax agencies. We handle state registrations, quarterly filings, notice resolution, unemployment insurance, and ongoing compliance monitoring. We've processed hundreds of millions in payroll transactions and are scaling toward $1B in annual transaction volume.

Our engineering team builds AI-native infrastructure specifically for compliance automation. When a state agency changes a form, updates a deadline, or modifies a filing requirement, our systems adapt. We don't throw people at this problem. We build software that solves it.

Over the past few weeks, some of Central's largest customers have already switched to Warp.

We're offering Central customers 6 months free and a dedicated migration. Our team will handle payroll data migration, tax account transfers, and employee onboarding.

Sign up here. We'll get back to you within 24 hours.

Payroll is too important to be a feature inside someone else's product.