Hg Catalyst

Hg Catalyst is the AI product incubator for Hg, one of Europe's leading software investors with $100B+ under management. We're not consultants or advisors - we're builders.

We embed inside some of the world's leading software companies to build the agentic products that millions of people rely on to do their jobs. The industries we work in have fractal complexity: layers of rules, exceptions, and edge cases that compound the deeper you go. Accuracy is non-negotiable. We build production-grade AI that consistently delivers for the people who depend on it.

Catalyst is a team of engineers, product leaders, and designers. We operate from London and New York and have shipped 30+ products across complex, regulated industries including tax, accounting, legal, compliance, financial services, payroll, and healthcare.