ArbBets: Prediction Markets Arbitrage for Polymarket and Kalshi

Quick Overview

ArbBets is a real-time prediction market arbitrage scanner that finds positive EV spreads across platforms like Polymarket and Kalshi while providing API access for automated trading bots.

About ArbBets

What is ArbBets?

ArbBets is a software tool created to find prediction markets arbitrage. It continuously watches live event prices on popular platforms like Polymarket, Kalshi, and Opinion. The goal is to locate price differences between these websites to reveal Positive EV (+EV) plays.

Every single day, the tracker spots more than 100 arbitrage opportunities. The price gaps, or spreads, usually range from 2% to 8%. By using live orderbook data, ArbBets helps you rely on math and real numbers instead of guessing.

Who is it for?

This platform is designed for active traders, arbitrage seekers, and anyone looking for a reliable mathematical edge. If you want to find mispriced odds across different prediction markets before they adjust, this tool gives you that real-time view.

It is also fully equipped for developers and bot builders. ArbBets provides API access that delivers clean, organized market data. This means you can easily connect AI bots or automated trading scripts to execute your strategies instantly.

How it works?

Our arbitrage scanner constantly pulls real-time data from Polymarket, Kalshi, Opinion, and Novig. It places the live prices for "Yes" and "No" contract outcomes right next to each other on a single dashboard for easy tracking.

When the total cost to buy all possible outcomes across different sites is less than the guaranteed final payout, a spread is formed. The system automatically calculates the math and highlights the exact percentage. You can then use this data to buy shares on one platform and hedge your position on another. Because odds change rapidly, the continuous screening ensures you see the open gaps immediately.

Key Features

Arbitrage Scanner

Continuous scanning of Polymarket, Kalshi, and Opinion to identify over 100 daily price discrepancies with spreads between 2-8%.

Real-Time Orderbook Data

Access live, up-to-the-minute market data and pricing gaps across multiple prediction platforms from a single dashboard.

ArbBets API Access

Clean and normalized data endpoints for Polymarket and Kalshi to help developers build AI-driven arbitrage bots and automated trading agents.

Positive EV Finder

Identify mispriced odds and mathematically backed +EV opportunities by comparing Kalshi, Polymarket, and Novig before market corrections.

Prediction Markets Screener

A comprehensive side-by-side comparison tool to track live prices across prediction markets and sportsbooks simultaneously.

Arbitrage Calculator

Integrated tools to calculate potential returns and required stakes for cross-platform arbitrage opportunities.

Frequently Asked Questions

Prediction market arbitrage is the practice of taking advantage of price discrepancies for the same event across different platforms, such as Polymarket and Kalshi, to lock in a profit regardless of the event's outcome.

It works by identifying instances where the 'Yes' price on one platform and the 'No' price on another platform add up to less than $1.00. By buying both sides at these prices, you guarantee a payout that exceeds your total cost.

Positive Expected Value (+EV) plays are bets where the objective probability of an outcome is higher than the阁 implied probability of the odds. Our tool finds these by comparing live prices across Kalshi, Polymarket, and Novig to spot mispriced markets.

Our scanner identifies over 100+ arbitrage opportunities every day across supported prediction markets.

While returns vary based on market volatility, we typically find spreads ranging from 2% to 8% per successful trade.

Yes, we offer API access that provides clean, normalized real-time orderbook data from Polymarket and Kalshi for developers and professional traders.

Absolutely. Our API is designed specifically for bots and agents, allowing you to automate execution and react to price gaps faster than manual trading.

Arbitrage windows can be very short as odds change rapidly. High execution speed is often the key edge in capturing these price gaps before the market corrects.

We currently monitor and scan Polymarket, Kalshi, Opinion, and sportsbooks like Novig for price discrepancies.

Plans start at $59 per month. You can browse live opportunities for free without a credit card to see the tool in action.

Yes, you have the flexibility to cancel your subscription at any time through your account settings.

Please refer to our terms of service or contact our support team regarding our refund policy and specific billing inquiries.