River provides a unified execution platform for professional prediction‑market desks, consolidating liquidity from multiple venues into a single multi‑book trading terminal.
Funding
Funding not disclosed
Founders
Product
Problem
Prediction‑market desks must integrate separately with each exchange, manage multiple order books, and build custom infrastructure for advanced order types, leading to operational complexity, higher latency, and sub‑optimal pricing.
Solution
River offers a unified execution platform that consolidates liquidity from venues such as Kalshi and Polymarket into a single multi‑book trading terminal. The platform provides native algorithmic order types—including icebergs, pegs, and take‑profit/stop‑loss—that are managed by River rather than the individual exchange, ensuring consistent behavior across markets. Smart routing automatically splits orders to capture an average price improvement of about two cents, while a unified order‑management system aggregates positions, fills, and P&L in one blotter. Developers can access the same functionality programmatically via an Ed25519‑signed REST/WebSocket API and official Python SDK, eliminating the need for venue‑specific integrations. Sub‑account support isolates strategies and capital without requiring separate exchange accounts.
Target Audience
River targets professional prediction‑market desks, quantitative trading teams, and fintech firms that require high‑frequency, multi‑venue execution and programmatic access to advanced order types.
Features
- Multi‑book view enabling hundreds of orders to be placed, modified, and cancelled directly from a single interface across all venues
- Native execution algorithms (Iceberg, Peg, Take‑Profit, Stop‑Loss) managed server‑side with automatic unwind on parent order cancellation
- Smart routing and basket tools that match contracts across exchanges for average 2¢ price improvement per trade
- Unified order‑management system consolidating positions, order history, fills, and P&L attribution in one blotter
- Sub‑account architecture for strategy or capital isolation with per‑subaccount P&L tracking
- Ed25519‑signed API and WebSocket streams with a single standardized `river_id` identifier for every contract
- Official Python SDK (sync and async, fully typed) with support for additional languages on request