Arbitrage Scanner
Cross-venue opportunities
Compare Polymarket prices against counter venues and inspect directional spreads.
Scanner Filters
Tune matching and spread thresholds before scanning.
Prediction Market Arbitrage
Polymarket and Kalshi arbitrage scanner
Predicts.guru scans matched markets for cross-platform price differences between Polymarket, Kalshi, and Limitless. It supports research into Polymarket, Kalshi, and broader prediction-market arbitrage.
If one venue has a cheaper YES contract and another has a cheaper NO contract on the same event, their combined cost can fall below $1.00. The table shows matched markets, current YES prices, estimated spread, similarity, and the two legs to inspect.
What the arbitrage page helps answer
- Where is YES cheaper? Compare Polymarket YES with Kalshi or Limitless YES for the same market.
- Which NO leg completes the hedge? Open the opposite side and verify the combined cost.
- Is the match trustworthy? Review similarity, expiration, titles, and risk flags before acting.
1. Match the same event
The scanner groups similar questions across venues and surfaces markets that appear to track the same outcome.
2. Compare YES and NO
Prediction-market arbitrage usually pairs a YES contract on one venue with a NO contract on another.
3. Check execution risk
A visible spread is only a starting point. Check liquidity, final rules, fees, and whether both markets can be entered at the displayed prices.
Search intents covered by this scanner
The table below summarizes the practical research questions this page is designed to answer.
| Search phrase | Intent | What to inspect |
|---|---|---|
| Polymarket arbitrage | Find markets where Polymarket is cheaper or more expensive than another venue. | Polymarket YES price, opposite NO leg, spread, and direct event link. |
| Kalshi arbitrage | Compare Kalshi contracts with matching prediction markets on Polymarket. | Kalshi YES price, matched Polymarket event, similarity, and expiration. |
| Prediction market arbitrage scanner | Scan many cross-platform markets instead of checking prices manually. | Matched markets, live spreads, action legs, and risk flags. |
How to use the Polymarket–Kalshi arbitrage table
Start with exact matches, active markets, and a high similarity threshold. Sort by spread, then open both event pages and compare the full market wording.
For deeper research, inspect related wallets with the Polymarket wallet checker, review holder and volume behavior in event analytics, or compare trader performance on the Polymarket leaderboard.
Important arbitrage risks
- Resolution rules can differ between platforms even when questions look similar.
- Fees, bid/ask spread, liquidity, and transfer timing can reduce or remove a visible edge.
- Some venues restrict access by region, account status, or market availability.
- Prices move quickly; recheck every opportunity on both event pages before trading.
Predicts.guru provides market analytics for research only. The scanner is not financial, trading, investment, legal, or tax advice. Verify prices and market rules directly on each platform.