Gavin Alexander Dein is a British entrepreneur and investor who pioneered card-linked rewards technology in Europe. He is the founder of Reward, EMEA's largest personalised card-linked offers platform, which he led for over two decades before its acquisition by Rezolve Ai in February 2026 in an all-cash transaction valued at approximately US$230 million. Under Dein's leadership, Reward returned over $2.5 billion in rewards to customers and donated approximately $20 million to charitable causes.