Numeral co-founders Sam Ross (left), chief executive, and Matt DuVall, chief technology officer. Credit: Numeral Sales tax has become a much bigger operational challenge as companies grow across markets, systems and business models. Sam Ross, co-founder and chief executive of Numeral, said that as the San Francisco company announced a $100m Series C on Wednesday. Insight Partners led the round.
Salesforce Ventures, Geodesic, Benchmark, Mayfield, FCVC, Y Combinator and Uncork also took part. Numeral has now raised $157m in total. Its previous round was a $35m Series B in September 2025. Ross founded the company in 2023 with Matt DuVall, its chief technology officer.
What Numeral does Numeral sells software that handles sales tax compliance from start to finish. That covers tracking where a company owes tax, registering, calculating rates, filing, paying and managing exemption certificates. It also supports VAT and GST compliance in more than 90 countries, and connects to more than 40 billing, financial and enterprise resource planning systems. The company combines a deterministic tax engine with AI and automation, and customers can reach in-house tax specialists for complex cases.
Numeral said its total transaction volume grew 327% year on year, and that it expects its tax engine to process more than 80 million transactions. It says customers can cut the time spent on filings and registrations by up to 80%. When companies move their existing exemption certificates onto the platform, 30% to 40% often fail validation, according to the company. Rules that keep moving Numeral pointed to California as an example of how fast the rules change.
The state has enacted a law that extends sales and use tax to prewritten software from 2027. That includes SaaS and software delivered electronically or accessed remotely. Rebecca Liu-Doyle, a managing director at Insight Partners, said the complexity is still growing. Sales tax is mission-critical to get right, and the complexity is only growing as regulations expand into new products and markets.
Other AI compliance startups have raised money this month. HelmGuard raised $7.3m this month for AI compliance agents, and Comp AI raised $34m to automate security compliance. Benford raised a pre-seed round to build a tech-native audit firm. Where the money goes Numeral will use the funding for product development and to expand into software, manufacturing, distribution and wholesale.
It will hire across engineering, sales, marketing and product. It has also launched an accounting partner programme. Firms can refer clients, resell the platform, use it to deliver their own services, or advise clients through implementation. Salesforce’s own chief executive, Marc Benioff, launched AIforce at Dreamforce last week.
Insight Partners and Salesforce Ventures also backed Wonderful’s $550m round this month. Arvind Ayyala, a partner at Geodesic Capital, set out why his firm joined Numeral’s. Tax compliance has traditionally forced businesses to choose between expensive manual work and software that still leaves them carrying the operational burden.
