TL;DR

River Markets is the prime broker for prediction markets. Trade across Kalshi, Polymarket, Polymarket US and Novig with smart order routing and advanced execution: icebergs, pegs, stop-losses, and take-profits. Manage orders, P&L, and risk across venues from a single view. Use our API, with one ticker schema across exchanges, to run systematic strategies without rebuilding connectors.

Ask:  If you’re a fund or professional trader interested in prediction markets, we’d love to talk. Reach us at [email protected]

https://www.youtube.com/watch?v=J-YJlAgkYCA

Problem

For hedge funds and pro traders, prediction markets are a pain to trade:

• Existing platforms are built for retail : Traders juggle tabs, work limit orders venue by venue, and babysit fills trade by trade. Hours that should go to alpha go to ops.
• Liquidity is fragmented. Exchanges have different prices on the same market, and there's no way to trade on both books at the best price.
• API integrations are a nightmare : Constantly changing and breaking, systematic traders end up spending more time fixing exchange connectors than producing alpha

How we solve it

River Markets is the advanced trading platform for prediction markets. 

One account, every venue, professional tooling.

Trading Terminal

• Advanced execution: icebergs, pegs, take-profits, stop-losses
• Smart order routing: trade assets with the same resolutions on all exchanges, at the best price. This alone improves pricing by up to 50%.
• Unified OMS: place, edit, and cancel orders across venues from a single Multi-Book view that handles hundreds of markets at once
• P&L attribution
• Sub-accounts to separate strategies or desks

Institutitional grade API

• Infrastructure built for institutional-grade latency
• Unified asset ID system across venues, so you write integration code once
• Historical orderbook and trade data
• Same advanced order types as the terminal: pegs, icebergs, SL/TP

Traction 

• $50M+ traded on the platform
• 200% week-over-week growth since the start of April
• Used by 3 of the top 10 traders on Kalshi and Polymarket, plus several quant funds running on our API

Who we are

Before River Markets, Oscar built models trading multi-billion dollar portfolios at BlackRock. Antonin built high-frequency trading strategies at Valkyrie.

We started writing prediction-market algorithms on nights and weekends and realized two things: this asset class is maturing faster than anything we've seen before, and the infrastructure gap between it and traditional markets is the only thing keeping professional capital out. We're closing that gap.

Check out our website : rivermarkets.com