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 step-by-step execution guides; automated execution is in final testing. Here's how they compare.
| Feature | Arbitrage Agent | ArbPoly |
|---|---|---|
| Type | Scanner + guided execution (automated execution in final testing) | Scanner only |
| Markets monitored | Matched Kalshi–Polymarket catalogue | Polymarket only |
| Execution | Signals and guides today; automated execution planned for Operator | Manual only |
| AI matching | AI matching plus a resolution-rules check | Not stated on its site |
| Cross-platform | Yes (Polymarket + Kalshi) | No (Polymarket only) |
| Circuit breaker | In final testing — auto-unwind on partial fill | Not stated on its site |
| Kelly sizing | Operator plan (coming soon) | Not stated on its site |
| Kill switch | Operator plan (coming soon) | Not stated on its site |
| Paper trading | Signals are logged with dry-run P&L tracking | Not stated on its site |
| Non-custodial | Yes | N/A (no execution) |
| Starting price | $29/mo | No monthly fee; a small percentage of each successful trade |
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 has no monthly fee. According to its FAQ it takes a small percentage of each successful arbitrage trade, so you pay only when you profit (the percentage is not published there).
Source: https://arbpoly.com
Arbitrage Agent monitors thousands of binary event markets across Polymarket and Kalshi continuously. AI-powered semantic matching — every pair validated before it goes live — links identical events across platforms — even when titles differ completely.
When a price gap creates an arbitrage opportunity, the opportunity appears in your live feed with both legs ready to place. Automated parallel execution (with a circuit breaker that auto-unwinds if one leg fails) is in final testing and rolls out to Operator subscribers first. 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 — every pair validated before it goes live — 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 lists a ready-to-place signal for both legs once a spread is confirmed, which saves checking two platforms by hand. Automated parallel execution is in final testing. Spreads can close quickly, so faster detection helps, though it does not guarantee a fill.
Difference 4
Arbitrage Agent's planned Operator execution adds a circuit breaker (auto-unwinds if one leg fails), Kelly sizing and a kill switch; on Starter you manage risk yourself. ArbPoly is a scanner, so any risk controls would be yours to set; we have not seen risk tooling described on its site.
When to choose ArbPoly
When to choose Arbitrage Agent
ArbPoly and Arbitrage Agent serve fundamentally different needs. ArbPoly is a Polymarket-only tool with no monthly fee — useful for manual research on a single platform. Arbitrage Agent is a cross-platform arbitrage service that finds and matches opportunities across Polymarket and Kalshi and gives you the exact orders to place; automated execution is in final testing. If you only trade Polymarket and prefer paying a share of each successful trade, 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.
How does ArbPoly charge?
ArbPoly has no monthly fee: its FAQ says it takes a small percentage of each successful arbitrage trade, so you pay only when you profit. Arbitrage Agent starts at $29/month but includes AI matching, execution guides, and risk sizing that ArbPoly doesn't offer; automated execution is in final testing.
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.
See the live arbitrage feed
Both legs ready to place, with a step-by-step guide. You trade on your own accounts. No coding required.
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