Former Zora CEO Jacob Horne Joins Polymarket to Lead DeFi Product Revival Polymarket founder and CEO Shayne Coplan announced that former Zora CEO Jacob Horne has joined Polymarket. He will work closely with Coplan to lead product efforts, focusing on 'making Polymarket DeFi great again.' Coplan stated that Horne is one of the top talents in product and innovation within the crypto space. Having previously built several outstanding products, he will now bring the product-market fit and distribution capabilities that Polymarket needs.