StarkWare launches OffMarket for private trading on Polymarket

Polymarket traders have long operated in public. Every bet, balance, and position sits on-chain for anyone curious enough to look. StarkWare now wants to change that. The company has opened OffMarket to the public, a platform that lets Polymarket users trade without publicly linking their positions to their accounts. How OffMarket works OffMarket, which lives at offmarket.cx, runs on a privacy layer built on Starknet. That layer uses zero-knowledge proofs to obscure user balances and trading activity. In OffMarket’s case, the proofs shield activity on the Polygon network. Polymarket’s markets keep functioning normally, while the link between a trade and the person behind it gets blurred. Traders deposit USDC on Polygon and can start trading without ever creating a Polymarket account. OffMarket handles the wallet side itself. It manages derived wallets on behalf of users, which separates each trade from a trader’s primary identity on-chain. OffMarket does not try to build a rival market from scratch. It plugs into Polymarket’s existing order books, odds, and liquidity, so private traders are not stuck in a smaller, thinner pool. StarkWare frames OffMarket as something like a VPN for...