Husayn Kassai co-founded Onfido, the identity verification company, while studying at Oxford University. He served as Chief Executive Officer from the company's founding in 2012, building it into one of Europe's prominent technology businesses in the document and biometric verification space. Under his leadership, Onfido raised substantial venture capital and expanded its operations globally, serving clients across financial services, fintech, and other regulated industries. Kassai stepped back from the CEO role at Onfido in 2023. His work at Onfido placed him among a generation of Oxford-affiliated founders who built significant technology businesses in the UK during the 2010s.