ArbPoly is a Polymarket-focused scanner that tracks arbitrage opportunities on a single platform. Arbitrage Agent works across Polymarket and Kalshi with AI matching and automated execution. Here's how they compare.
| Feature | Arbitrage Agent | ArbPoly |
|---|---|---|
| Type | Scanner + Execution | Scanner only |
| Markets monitored | 4,812 (cross-platform) | Polymarket only |
| Execution | Parallel, both legs <400ms | Manual only |
| AI matching | Semantic, 99.2% precision | No |
| Cross-platform | Yes (Polymarket + Kalshi) | No (Polymarket only) |
| Circuit breaker | Yes — auto-unwind on partial fill | No |
| Kelly sizing | Yes | No |
| Kill switch | Yes | No |
| Paper trading | Yes (dry-run mode) | No |
| Non-custodial | Yes | N/A (no execution) |
| Starting price | $29/mo ($19 early bird) | Free |
ArbPoly is a scanner focused on tracking arbitrage opportunities within Polymarket. It surfaces price discrepancies and lets users identify potential trades manually.
Unlike cross-platform arbitrage tools, ArbPoly focuses on a single venue — Polymarket. This limits it to intra-platform opportunities rather than the price gaps that exist between different prediction markets.
ArbPoly is free to use and provides a straightforward interface for tracking Polymarket prices. It does not execute trades or provide risk management features.
Source: https://arbpoly.com
Arbitrage Agent monitors 4,812 binary event markets across Polymarket and Kalshi in real time via WebSocket. AI-powered semantic matching (99.2% precision) links identical events across platforms — even when titles differ completely.
When a price gap creates an arbitrage opportunity, both legs execute in parallel under 400ms. A circuit breaker auto-unwinds if one leg fails, ensuring zero directional exposure. The agent is fully non-custodial — your capital stays on Kalshi and Polymarket at all times.
Difference 1
The most fundamental difference. True prediction market arbitrage exploits price gaps between platforms — like when Polymarket prices an event at $0.44 YES while Kalshi prices the same event at $0.52 NO. ArbPoly only looks at Polymarket, missing cross-platform opportunities entirely. Arbitrage Agent monitors both Polymarket and Kalshi simultaneously.
Difference 2
Even when the same event exists on Polymarket and Kalshi, the titles are often completely different. Arbitrage Agent uses AI-powered semantic matching (99.2% precision) to link identical events across platforms. ArbPoly doesn't need cross-platform matching because it only covers one venue.
Difference 3
ArbPoly shows you opportunities; Arbitrage Agent acts on them. When a spread appears, both legs execute in parallel under 400ms — faster than any human can manually place orders. With spreads closing in 30-200 seconds, automation is the difference between capturing and missing opportunities.
Difference 4
Arbitrage Agent includes a circuit breaker (auto-unwinds if one leg fails), Kelly criterion position sizing, and a kill switch. Since ArbPoly doesn't execute trades, it has no risk management — all risk is on the user.
When to choose ArbPoly
When to choose Arbitrage Agent
ArbPoly and Arbitrage Agent serve fundamentally different needs. ArbPoly is a free Polymarket scanner — useful for manual research on a single platform. Arbitrage Agent is a cross-platform execution engine that finds, matches, and executes arbitrage trades across Polymarket and Kalshi automatically. If you're only looking at Polymarket prices for free, ArbPoly works. If you want to capture real arbitrage spreads between platforms before they close, Arbitrage Agent is built for that.
Does ArbPoly work with Kalshi?
No. ArbPoly only covers Polymarket. For cross-platform arbitrage between Polymarket and Kalshi, you need a tool like Arbitrage Agent that monitors both venues.
Is ArbPoly free?
Yes, ArbPoly is free to use. Arbitrage Agent starts at $29/month ($19 early bird) but includes automated execution, AI matching, and risk controls that ArbPoly doesn't offer.
Can I do arbitrage on just Polymarket?
Intra-platform arbitrage opportunities on Polymarket alone are rare and small. True arbitrage typically requires price gaps between different platforms — like Polymarket and Kalshi pricing the same event differently.
Why does cross-platform matter for arbitrage?
Different prediction markets have different user bases, liquidity, and fee structures. This creates persistent price gaps for the same events. Cross-platform monitoring is how you find genuine arbitrage opportunities.
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