YC SP26 · Active

River Markets

Prime brokerage for prediction markets

Class: Spring 2026
Status: Active
Industry: Fintech
Location: San Francisco, CA, USA
Team size: 2

Website

https://www.rivermarkets.com

About

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.