Polymarket has hired former Zora CEO Jacob Horne to work on product, with an emphasis on its DeFi offering, as Chief Executive Shayne Coplan seeks to revive the prediction market's onchain business. Coplan said performance had waned as the company scaled and that some longtime users believed Polymarket had shifted its focus to its U.S. business. The company plans to unify its products and hold a DeFi town hall soon, but has not announced a launch date or changes to fees, liquidity or order routing. The appointment adds a senior product leader while Polymarket separately rebuilds its central limit order book from scratch in Rust. The new engine is targeted for mid-to-late fourth quarter and early tests showed 10 to 20 times faster 99th-percentile latency and capacity of 200,000 orders per second, although it had not launched when those figures were published. Polymarket held 17% of the $15.8 billion traded across Polymarket and Kalshi in the week to September 13, compared with Kalshi's $13.1 billion.