Execution and portfolio management platform giving professional traders one terminal and API to trade across prediction-market venues.
River Markets provides hedge funds, proprietary trading firms, and professional traders a single terminal and unified REST and WebSocket API to trade across prediction-market exchanges including Kalshi, Polymarket, and Polymarket US. The platform offers native execution algorithms (Icebergs, Pegs, Take-Profit and Stop-Loss), smart order routing with approximately 2-cent average price improvement, subaccounts for strategy isolation, and an official typed Python SDK. Funds remain in customer-controlled venue accounts. River Markets is a product of River Markets.