Name: River Markets: editorial review
Rating: 3.5
Author: PredictionToolkit

What is River Markets?

The published live venue list includes Kalshi, Polymarket, Polymarket US and Crypto.com; Novig is listed as in integration. Routing compares eligible matched contracts across connected venues rather than treating every market as interchangeable.

The FAQ says funds remain in customer-controlled accounts at the connected venues. Prime-brokerage branding alone does not establish included margin, custody or cross-venue netting; those require separate discussion. Provider case-study improvements are not a fixed execution entitlement.

Who it is for

Professional desks managing many simultaneous orders.
Developers building systematic execution.
Teams separating strategy books and performance.

Features and coverage

Multi-book terminal and OMS
Place, modify and cancel orders from several books, and track orders, fills, positions and PnL in a unified blotter.
Server-side complex orders
River manages Icebergs, Pegs and take-profit/stop-loss structures as parent/child workflows. Cancelling the parent unwinds its child-order workflow.
Eligible-contract routing
Compare matched contracts across connected venues before evaluating actual all-in execution.
Subaccounts and standard identifiers
Separate strategy books and attribute results, using river_ids to reduce repeated venue-ticker mapping.
Typed Python clients
The Python SDK offers typed synchronous and asynchronous clients.
Locally signed transport
REST requests and WebSocket handshakes use local Ed25519 signatures.

Workflows with River Markets

Consolidate a desk

Connect supported venue accounts and assign strategies to subaccounts for order and PnL tracking.

Configure an iceberg

Set total size, displayed tranche, limit price and post-only behavior, then monitor child orders by parent ID.

Evaluate routing quality

Compare actual fills including costs with the eligible venue alternatives instead of assuming a case-study average applies.

Pricing and total cost

Numeric fees are not publicly listed. Access and commercial terms are discussed through the demo/contact flow.

Getting started

Before you start: Novig is in integration, not listed live.

Read the quickstart and security documentation.
Confirm supported venue accounts and required permissions, then arrange access for the desk.
Configure signing credentials and subaccounts.
Test order creation, replacement and cancellation before relying on the workflow.
Monitor fills and reconcile connected venue balances.

Access requires supported venue accounts and commercial arrangements; the FAQ says funds remain in customer-controlled venue accounts.

Useful links

What to check

Novig is in integration, not listed live.
Prime-brokerage branding does not establish included margin, custody or cross-venue netting.
Case-study price improvements are provider examples, not guaranteed results.
Connected venue scope and commercial access need checking for the intended desk.

A closer look

Ratings & reviews

Editorial rating

3.5/ 5

0 user reviews

PredictionToolkit editorial

Our take on River Markets

The unified order manager, signed transport and explicit complex-order controls form a concrete professional integration offering. Commercial terms and venue rollout need checking, and algorithm descriptions or case studies should not be read as execution benchmarks.

Based on documented features, setup and access terms. How we rate