River Markets raises $8.5 million seed round for institutional prediction market tools
River Markets raised an $8.5 million seed round to build prediction market trading tools for institutional clients. The company was founded by Antonin Parrot and Oscar Levy. River Markets targets financial institutions that now view prediction markets as instruments to hedge risks, a shift from the sector's earlier reputation as casual betting. The round was led by Haun Ventures. Y Combinator, Coinbase Ventures, and Qube Research Technologies also participated.
Institutional traders need clean interfaces and reliable infrastructure before they commit capital to prediction markets. River Markets' seed round tests whether a dedicated institutional layer can attract volume faster than generalist platforms can build comparable tools. The founders' focus on a single interface suggests they believe fragmentation across existing venues is the main barrier to institutional entry.
River Markets lands even one major hedge fund or bank as a client, it forces Kalshi, Polymarket, and ProphetX to match its institutional workflow or cede that segment. The11.2-day gap since ProphetX's larger raise shows investors are now funding multiple bets on the same infrastructure thesis. A crowded field of institutional gateways may compress fees and accelerate platform consolidation before any single venue achieves sustainable liquidity. The sector's shift from casual betting to risk-hedging instruments is now concrete enough to support parallel seed rounds.
Becomes the fourth prediction market infrastructure raise this month, after ProphetX's $35 million round and the targeted $20 billion and $40 billion valuations for Polymarket and Kalshi.