SAN FRANCISCO--(BUSINESS WIRE)--Sep 18, 2025-- Numeral, the AI-powered sales tax compliance platform, today announced a $35 million Series B led by Mayfield, with participation from Benchmark, Uncork Capital, Y Combinator, and Mantis. The announcement follows a year of rapid growth for Numeral, which has processed over $5 billion in transaction volume, filed 150,000 sales tax returns, and achieved 3.5x year-over-year revenue growth. Sales tax has become one of the most complex and costly compliance issues facing businesses.