River Markets
River Markets is a YC Spring 2026 (P26) company. Based in San Francisco, CA, USA. Team of 2.
About River Markets
Summary
River Markets builds a prime brokerage platform for professional prediction-market traders, connecting hedge funds, prop trading firms, and individual professionals to every major event-contract venue through a single account. It replaces the manual work of managing separate venue logins, fragmented positions, and inconsistent execution by delivering a unified trading terminal, order management system, execution algorithms, and smart order routing across venues.
Business model
Demo-gated access, with a unified API and platform targeting institutional and professional desks.
Go-to-market
Hedge funds, prop firms, and professional traders are the buyers; they enter through a booked demo or direct API documentation access, indicating a sales-assisted onboarding motion.
From the Y Combinator listing
Prime brokerage for prediction markets
River Markets is the prime brokerage for prediction markets. We aggregate every major event-contract venue into one account, giving professional traders best execution, portfolio and order management systems, and a unified API.
Facts
- Fintech / Fintech
- San Francisco, CA, USA
- 2
- Active
- Early
Founders (2)
- Oscar Levy
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