Numeral raises $100M to turn AI into a full-time sales tax accountant

Numeral just pulled in $100 million in Series C funding, with Insight Partners leading the round and a long list of backers joining in, including Salesforce Ventures, Benchmark, Mayfield, Y Combinator and Uncork Capital. The San Francisco startup says its platform now handles sales tax, VAT and GST for more than 3,500 businesses, and the new money brings its total raised to $157 million.

The timing is doing a lot of the work here. California has signed Senate Bill 122, which extends sales and use tax to prewritten software, including SaaS, starting January 1, 2027. The state expects the change to bring in close to $2 billion a year, and for finance teams that means another round of system updates, filings and jurisdiction-by-jurisdiction cleanup.

Numeral was founded in 2023 by Sam Ross, a former Airbnb product manager, and Matt DuVall, who previously worked on Stripe and Notion. Ross says the pain showed up when his own e-commerce businesses crossed state lines and tax obligations multiplied. The company’s pitch is a mix of deterministic tax software, AI and human specialists, covering everything from nexus monitoring and registrations to calculation, filing, remittance and exemption certificate management.

The platform supports VAT and GST compliance in more than 90 countries and connects with more than 40 billing, financial and ERP systems. Numeral says 30% to 40% of exemption certificates fail validation on the first pass when customers move them onto the platform, which is a tidy little warning label on how much manual mess is still hiding in this market.

There’s plenty of competition. Avalara and Vertex are still there, but Numeral is also facing AI-native upstarts like Anrok and Zamp. The company says its total transaction volume grew 327% year over year, and it expects its engine to process more than 80 million transactions. It also says customers can cut filing and registration time by up to 80%, while its exemption certificate product can save up to 400 hours a year. That’s the sort of pitch investors like when tax rules are changing and nobody wants to own the spreadsheet.