Why Look for EventArb Alternatives?
EventArb is a cross-market arbitrage scanning tool that monitors event-contract markets, including Kalshi, to surface pricing discrepancies that traders can potentially exploit. For Kalshi traders who want to identify moments when the same underlying event is priced differently across platforms, EventArb provides a consolidated view that removes the need for manual comparison. However, exploring EventArb alternatives makes sense for a number of reasons — some tools focus specifically on certain platform pairings, others come in different formats like browser extensions or scriptable actors, and pricing or workflow preferences may lead traders toward a solution that integrates more naturally with how they already operate.
Kalshi operates as a CFTC-regulated prediction market exchange where all balances and settlements are handled in USD, and markets are structured as event contracts accessible via a REST, WebSocket, or FIX trading API. Any arbitrage tool used alongside Kalshi needs to work within that regulatory and technical context. The tools listed below each take a distinct approach to cross-market arbitrage scanning and analysis, giving Kalshi traders a range of options depending on their technical comfort level, preferred interface, and specific market coverage needs.
Best EventArb Alternatives in 2026
OddPool
OddPool compares odds across prediction markets and surfaces arbitrage opportunities, including those available on Kalshi. Like EventArb, it takes a cross-market approach, but its focus on odds comparison may appeal to traders who prefer to evaluate pricing in those terms rather than through a purely contract-centric lens. It functions as a standalone web-based tool, making it accessible without any installation or technical setup.
Best for: Kalshi traders who want a straightforward odds-comparison interface to identify cross-market pricing gaps quickly.
PolyArbitrage (Chrome Extension)
PolyArbitrage is a Chrome browser extension that specifically targets arbitrage opportunities between Polymarket and Kalshi, making it a more focused alternative for traders who operate on both of those platforms. Because it runs directly in the browser, it integrates into a trader's existing research workflow without requiring a separate application. Its narrow platform scope means it is less broad than EventArb but potentially more precise for the Polymarket–Kalshi pairing.
Best for: Traders who actively use both Polymarket and Kalshi and want an always-available browser-based arb alert tool.
Polymarket–Kalshi Arb Finder
This tool is an Apify actor — a cloud-based, scriptable automation — that scans for arbitrage opportunities between Polymarket and Kalshi. Unlike EventArb's interface-driven approach, the Apify actor format means it can be scheduled, customized, or integrated into larger data pipelines by technically inclined users. It is purpose-built for the Polymarket–Kalshi pairing, which makes it a specialized but powerful option within that corridor.
Best for: Developers or technically advanced traders who want to automate and customize their arbitrage scanning using a cloud-based actor framework.
ArbBets
ArbBets is an arbitrage tool designed for prediction markets that includes Kalshi among the platforms it covers. It offers a cross-market scanning capability similar in intent to EventArb, and may differ in terms of its interface, market coverage breadth, or alerting mechanisms. Traders looking for an EventArb substitute with a potentially different user experience or feature set will find ArbBets worth evaluating directly.
Best for: Prediction market traders who want a dedicated arbitrage tool and are comparing options across multiple providers before committing.
DeFiRate Prediction Market Calculators
DeFiRate provides prediction-market calculators and odds tools that are relevant to Kalshi traders, though it takes a more analytical and educational approach rather than real-time scanning. It is less of a live arbitrage finder and more of a toolkit for understanding market pricing and running manual calculations. Traders who want to build a deeper understanding of the math behind arbitrage opportunities may find it a useful complement or starting point.
Best for: Traders who prefer to manually verify or calculate potential arb opportunities rather than relying solely on automated scanning.
How to Choose the Right Alternative
Selecting the right arbitrage tool for use with Kalshi depends on how you trade, which other platforms you use, and how much technical involvement you want in the process. Each tool above has a distinct profile, and matching that profile to your workflow will have a bigger impact than any single feature difference.
- Platform coverage: Determine which markets you actively trade — some tools are specific to Polymarket–Kalshi, while others scan more broadly.
- Interface format: Decide whether you prefer a web app, a browser extension, or a scriptable cloud actor based on how you work day-to-day.
- Real-time vs. manual: Consider whether you need live scanning and alerts or whether calculators and manual tools fit your trading pace.
- Technical requirements: Some tools require no setup at all, while others like the Apify actor assume comfort with automation and scripting.
- Regulatory context: Ensure any tool you use is compatible with Kalshi's USD-settled, CFTC-regulated environment and does not assume features or settlement mechanisms that belong to other platform types.