Zamp Raises $30M to Scale AI-Driven Sales Tax Compliance Across 12,000+ Jurisdictions

The Supreme Court’s 2018 Wayfair decision forced businesses to track sales tax obligations across more than 12,000 taxing authorities in the U.S. alone, a burden that has grown steadily harder to manage as regulations evolve and the profession built to handle it faces a structural collapse. Three-quarters of U.S. accountants are expected to retire within 15 years, and EY research shows tax professionals already spend 45% of their time gathering and cleaning data before compliance work even begins, leaving firms to scale a practice they cannot staff. Zamp built its operating system for sales tax to own that outcome entirely, handling filing, registration, notices, taxability mapping, and data normalization for clients across all 50 U.S. states and more than 100 countries. Unlike legacy vendors that deliver software and leave customers to figure out the outcome themselves, Zamp built its own tax data layer across 12,000-plus jurisdictions, pairs AI agents with in-house tax and legal professionals at every step, and backs every filing with a direct penalty guarantee. More than 120 accounting firms now use the platform, and Zamp has completed more than 100,000 on-time filings with 99.97% accuracy while remitting over $300M in sales tax on their clients’ behalf.

AlleyWatch sat down with Rohit Bhadange, CEO and Founder of Zamp, to learn more about the business, its future plans, recent funding round, and much, much more…

Who were your investors and how much did you raise?

The company has raised $30M in total funding to take sales tax off finance teams’ plate. Our latest round was led by Acrew Capital with participation from Thomson Reuters Ventures, along with several of our accounting firm partners who invested directly. We’re also backed by 20Growth, Friends & Family Capital, Good Friends Venture Capital, and other strategic investors from earlier rounds.

Tell us about the product or service that Zamp offers.

Zamp is the operating system of sales tax with a built-in managed service. We combine AI agents with tax and legal professionals to own the entire sales tax compliance lifecycle: filing, registration, notices, data normalization, and taxability mapping. Unlike other vendors, we own the outcome. If we get it wrong, we cover the penalty. 120+ accounting firms use Zamp to deliver managed sales tax compliance to their clients — as a referral partner or white-label service.

What inspired the start of Zamp?

I spent the first part of my career on the investing side in private equity, growth, and early-stage venture across a few industries. The one thing that kept coming up was sales tax. Finance leaders were constantly complaining that nobody was helping them. Every year they’d have this liability on the balance sheet they couldn’t predict. Nobody was owning the outcome with them. They’d buy the software and still have to figure it out themselves, or hire a third party who’d manually piece it together across jurisdictions to maybe get it right with zero visibility. Sales tax was a black box. I started Zamp with a few other industry operators to fix that.

How is Zamp different?

Three things. First, we built our own tax data layer across thousands of jurisdictions globally, instead of relying on third-party data. Second, we own every workflow end-to-end: filing, registration, notices, data normalization, taxability. Third, we pair AI agents with tax and legal professionals to deliver the best outcome for the customer. Service matters to us. We think about what’s right for each customer and meet them where they are. And we stand behind it — if Zamp gets it wrong, Zamp covers the penalty. That’s only possible because we control the data, the workflows, and the execution.

What market does Zamp target and how big is it?

Global sales tax compliance is $30B+ market — 12,000+ jurisdictions in the U.S. alone and dozens of countries globally. We serve e-commerce, SaaS, digital services, retail, and increasingly accounting firms that deliver compliance to their clients. The accounting firm channel (~$20B) is particularly important because 75% of U.S. accountants are expected to retire in the next 15 years, and firms can’t hire their way through it. Zamp is how they scale their sales tax practice without building a dedicated team.

What’s your business model?

We charge an annual fee to own the entire sales tax lifecycle based on the complexity of the business. If we get it wrong, we cover the penalty. That’s different from legacy or other newer providers who charge per filing, per registration, or on basis points. They charge for inputs. We charge for outcomes.

How are you preparing for a potential economic slowdown?

The business was built to be efficient. Our agents and our product are the leverage — not headcount. We don’t need to hire 50 more people to support 50 more firms. That’s why our margins in this business are the best in this space. Combined with over 95% client retention and 98% partner retention, the business model is resilient regardless of macro.

What was the funding process like?

Tight. We weren’t actively raising; we were focused on building the right product and delivering for our customers. Word got around, we were getting preempted by several firms, and the round came together quickly with a small group we wanted to work with.

What are the biggest challenges that you faced while raising capital?

Deciding who to work with. We had more demand than we needed, so the hard part was saying no to great firms to keep the cap table focused.

What factors about your business led your investors to write the check?

Three things. First, our customers did most of the work; over 95% client retention, 98% partner retention. When your customers are speaking for you, there’s not much left to explain. Second, the infrastructure approach combined with real unit economics. We built our own data layer, own every workflow end-to-end, and it shows in the numbers; one person on our compliance team is now doing what used to take 12. Third, the distribution model. 120+ accounting firms already on the platform is a very different motion than selling direct to individual companies, one at a time.

Three things. First, our customers did most of the work; over 95% client retention, 98% partner retention. When your customers are speaking for you, there’s not much left to explain. Second, the infrastructure approach combined with real unit economics. We built our own data layer, own every workflow end-to-end, and it shows in the numbers; one person on our compliance team is now doing what used to take 12. Third, the distribution model. 120+ accounting firms already on the platform is a very different motion than selling direct to individual companies, one at a time.

What are the milestones you plan to achieve in the next six months?

Scale the accounting firm channel with our partnership program (Referral and White-Label), expand AI agent coverage across more service layers like, and continue building compliance depth by country and vertical. Clear concrete target: increase one person’s output from 12x to 100x.

What advice can you offer companies in New York that do not have a fresh injection of capital in the bank?

Capital efficiency is the advantage when capital is tight. Build a great product that creates leverage, not one that requires more headcount. If your only path to scale is adding people, the math won’t work to keep the business alive. Focus on retention over new logos. Great companies compound on customers who stay. And stand behind your work. Customers can tell the difference between a tool and a partner.

Where do you see the company going now over the near term?

We’re scaling the operating system. More firms, more countries, more service layers, deeper agents, smarter automation. The goal is to be the category leader for sales tax globally, and to enable every accounting firm to deliver sales tax compliance at scale without hiring.

What’s your favorite spring destination in and around the city?

Post-tax-season tennis. April 15 comes and goes, the courts finally thaw out, and the whole city gets back outside. Central Park, Riverside Park, or when I can get out to Queens, the Billie Jean King National Tennis Center, home of the US Open. That’s spring to me.