Vishal Marria grew up in Clapham and Brixton. His parents came from India in the 1960s and built delivery, off-licence and cash-and-carry businesses. From about age six he worked in the Brixton cash-and-carry every day with his three siblings.
He later worked at Detica, SAS and EY. At EY in 2015 he saw teams stitching datasets together by hand to assess risky clients. He founded Quantexa in London in 2016 with Imam Hoque to automate that work.
In April 2023 Quantexa raised a $129M Series E at about a $1.8bn valuation, backed by Warburg Pincus, GIC and HSBC, and bought Aylien. Annual recurring revenue passed $100M in October 2024.
A $175M Series F followed in March 2025, led by Teachers' Venture Growth. Zurich became the first insurer on its AI fraud platform in October 2025. Dealroom lists a valuation of $2.6B in November 2026.