Kalshi March Madness: How it compares to Polymarket

If you searched "Kalshi March Madness" you’re likely comparing event platforms for tournament betting. Kalshi is a CFTC-regulated event exchange that lists sports and political contracts; March Madness is a natural fit for their offering. Polymarket is a decentralised prediction market on Polygon with different mechanics and liquidity profiles. For traders seeking systematic advantage, PolyArb (our Polymarket arbitrage bot) offers low-latency alerts, non-custodial execution, and a documented $7.62 minimum guaranteed edge per qualifying trade.

What Kalshi does for March Madness traders

Kalshi operates as a regulated event exchange where users buy contracts that settle to $1 if an outcome occurs. Their CFTC oversight and fiat on/off-ramps make them attractive for US-regulated users. Liquidity and fee structure are tailored to their regulated model, which differs from decentralised platforms.

How Polymarket differs

Polymarket runs on Polygon and uses the Gnosis CTF for outcome tokens; settlement uses pUSD and UMA for resolution. Markets are traded on a CLOB with tick sizes and maker/taker mechanics that create short-lived arbitrage opportunities. Polymarket’s gasless relayer model and ERC-1155 outcomes change operational flow compared with Kalshi’s regulated rails.

Where PolyArb fits in

PolyArb is a tool for capturing intra-Polymarket arbitrage opportunities, not a competitor to Kalshi. It monitors price discrepancies, alerts you via Telegram and Discord, and executes non-custodial orders. PolyArb runs at ~40ms latency, offers a $7.62 minimum guaranteed edge on eligible trades, and is live today for $99/month.

Risks and practical trade notes

A guaranteed edge does not eliminate risks. Resolution disputes via UMA, settlement timing, slippage and partial fills, fee changes, and smart contract risk can all affect realized P&L. PolyArb’s approach reduces latency and execution risk but does not remove oracle or regulatory risk. Assess position sizes and the platform’s geographic restrictions before trading.

Which platform should you use for March Madness?

If you need CFTC-regulated fiat rails in the US, Kalshi is suited to that use case. If you prefer decentralised markets with intra-market arbitrage strategies, Polymarket plus PolyArb is built for fast, systematic capture of short spreads. Your choice depends on jurisdiction, custody preferences, and whether you prioritise regulated access or low-latency market arbitrage.

FAQ

Is Kalshi the same as Polymarket?

No. Kalshi is a CFTC-regulated event exchange with fiat rails; Polymarket is a decentralised prediction market on Polygon using pUSD and Gnosis CTF.

Can I arbitrate March Madness across Kalshi and Polymarket?

Cross-platform arbitrage is possible in theory but falls outside PolyArb’s focus. PolyArb concentrates on intra-Polymarket arbitrage where execution and token mechanics are homogeneous.

What does PolyArb guarantee with the $7.62 edge?

PolyArb guarantees a $7.62 minimum edge on qualifying intra-Polymarket arbitrage trades under the product terms. Realized results can still be affected by resolution disputes, slippage, fees, and settlement timing.

Is PolyArb custodial?

No. PolyArb executes non-custodial orders through your connected wallet while handling latency-optimised monitoring and alerting.