Best Polymarket Arbitrage Tools in 2026 — Cross-Venue Edge, After Fees
A “5% arb” that ignores fees and depth is not a real arb. We compared the main Polymarket arbitrage tools on what actually determines profit: how many venues they cover, whether they net out fees, and whether they tell you how much you can actually fill.
Most scanners show a gross spread and call it a day. The edge that survives to your wallet depends on three things they often skip.
✓Cross-venue coverage — the more venues, the more mispricings (Polymarket, Kalshi, SX Bet, Azuro, Limitless…)
✓Net edge after fees — maker/taker fees can erase a thin gross arb entirely
✓Order-book depth — the real max stake you can fill at the quoted edge, not just the top-of-book price
✓Latency & alerts — arbs close fast, so Telegram/Discord push matters
The tools, compared
These are all legitimate arbitrage tools with different coverage and delivery. Pick by how many venues you trade and whether you need fee-and-depth-aware numbers.
✓WhalesInsider — cross-venue arbitrage and +EV value forks across Polymarket, Kalshi, SX Bet, Azuro and Limitless, with net edge after maker/taker fees, order-book depth for max fillable stake, and whale-anchored fair value. Alerts on Telegram/Discord/X.
✓ArbBets — AI-driven arbitrage and +EV across Polymarket, Kalshi and sportsbooks.
✓Eventarb — free cross-platform arbitrage calculator and alerts for Polymarket, Kalshi and Robinhood.
✓Polytrage — Telegram arbitrage alert channel with ~15-minute signals, spreads and profit calc for crypto markets.
✓PolyScalping — real-time scanner (60-second scans) for arbitrage and scalping across Polymarket, with Telegram alerts and filters.
✓Prediction Hunt — aggregation and arbitrage detection across Kalshi, Polymarket and PredictIt, refreshed every ~5 minutes.
Why fees and depth decide real arb profit
Two scanners can show the same market and disagree on whether it is profitable — because one ignores fees or assumes infinite liquidity. WhalesInsider models both, so the number you see is closer to what you keep.
✓Net edge is computed after maker/taker fees, per venue
✓Depth-aware max stake — know the size before you commit
✓Whale-anchored fair value — cross-checks the arb against where smart money actually is
✓Free to browse the arb feed; Premium adds real-time alerts and the full picture
FAQ
What is the best Polymarket arbitrage tool in 2026?▼
It depends on how many venues you trade. For cross-venue coverage (Polymarket, Kalshi, SX Bet, Azuro, Limitless) with net edge after fees and order-book depth, WhalesInsider is the most complete; ArbBets, Eventarb and Polytrage are solid focused alternatives.
Is Polymarket ↔ Kalshi arbitrage real?▼
Yes, the same real-world outcome is sometimes priced differently on Polymarket and Kalshi. The catch is fees and liquidity — a gross spread can vanish after maker/taker fees, which is why a fee-aware tool matters.
Do I need to pay for an arbitrage scanner?▼
You can browse WhalesInsider’s arbitrage feed free. Premium (19 / 99 / 149 USDC monthly / yearly / lifetime) adds real-time alerts, whale direction and the full net-edge/depth detail.