Why Look for PolyArbitrage (Chrome Extension) Alternatives?
PolyArbitrage is a Chrome extension designed to help traders identify arbitrage opportunities between Polymarket and Kalshi, the CFTC-regulated US prediction market exchange. By surfacing price discrepancies across these two platforms in real time from within the browser, it lowers the barrier to cross-market arbitrage for traders who want a lightweight, passive scanning tool. If you are actively trading on Kalshi and want to capture mispricings without building custom infrastructure, PolyArbitrage (Chrome Extension) alternatives are worth evaluating to ensure you are using the right tool for your workflow.
That said, PolyArbitrage has a narrow scope — it focuses exclusively on the Polymarket-to-Kalshi pair and operates only within the Chrome browser environment. Traders who want broader market coverage, a standalone web dashboard, programmatic or API-driven access, or more sophisticated analytics may find that other tools serve them better. Differences in update frequency, supported markets, interface preferences, and pricing models are all practical reasons to look beyond a single browser extension when building a reliable Kalshi arbitrage workflow.
Best PolyArbitrage (Chrome Extension) Alternatives in 2026
OddPool
OddPool is a web-based platform that compares odds and surfaces arbitrage opportunities across multiple prediction markets, including Kalshi. Unlike PolyArbitrage, which is limited to a Chrome extension and two platforms, OddPool provides a broader cross-market view through a standalone web interface that does not require a browser extension to operate. This makes it more accessible across different browsers and devices.
Best for: Kalshi traders who want a dedicated web dashboard for monitoring arbitrage opportunities across more than just two prediction markets.
Polymarket–Kalshi Arb Finder
This tool is an Apify actor — a cloud-based automated scraper — that programmatically scans for arbitrage opportunities between Polymarket and Kalshi. It covers the same market pair as PolyArbitrage but is designed for users who prefer scheduled or automated data collection rather than a browser extension. Traders can run it on demand or on a schedule, making it useful for those who want results delivered outside the browser.
Best for: Technically inclined traders who want to automate Polymarket-to-Kalshi arbitrage scans without keeping a browser tab open.
ArbBets
ArbBets is a dedicated arbitrage tool built for prediction markets, with Kalshi included among its supported exchanges. It approaches the problem differently from PolyArbitrage by offering a product-focused interface rather than a browser overlay, which may suit traders who prefer a more structured workflow. It is accessible via the Polymark.et ecosystem, providing a centralized hub for prediction market tooling.
Best for: Traders looking for a purpose-built arbitrage product that integrates into a broader prediction market toolset.
EventArb
EventArb is a scanner focused specifically on event-contract markets, including Kalshi, making it a strong thematic fit for traders active on CFTC-regulated exchanges. It differentiates itself from PolyArbitrage by being a standalone application rather than a Chrome extension, and it is designed around the event-contract category rather than tying itself to a specific pair of platforms. This broader scope can surface opportunities that extension-based tools may miss.
Best for: Kalshi traders who want an arbitrage scanner built specifically around event-contract markets and not limited to a single market pairing.
DeFiRate Prediction Market Calculators
DeFiRate offers calculators and odds tools tailored to prediction market traders, including those active on Kalshi. Rather than automatically scanning for arbitrage, these calculators help traders manually evaluate potential opportunities and understand implied probabilities. It is a more analytical, education-oriented resource than PolyArbitrage's passive scanning approach.
Best for: Kalshi traders who want to manually verify and calculate arbitrage scenarios rather than relying on an automated scanner.
How to Choose the Right Alternative
Selecting the right Kalshi arbitrage tool depends on your trading style, technical comfort level, and how actively you monitor markets. A browser extension suits passive, browser-based traders, while standalone dashboards or automated scripts suit those who want more control and coverage. Consider these criteria when evaluating your options:
- Market coverage: Does the tool scan only Polymarket and Kalshi, or does it cover additional prediction markets for broader opportunity detection?
- Interface type: Do you prefer a browser extension, a web dashboard, or a programmatic tool you can schedule and automate?
- Update frequency: How often does the tool refresh prices, and is that cadence fast enough for the arbitrage windows available on Kalshi?
- Technical requirements: Some tools require API access or coding knowledge; others are plug-and-play for non-technical users.
- USD settlement compatibility: Since Kalshi settles in USD and operates under CFTC regulation, ensure the tool correctly handles US-denominated event contracts without assumptions built for other platform types.