What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.

UFC Fight Night: Ricky Simon vs. Mo… | Robinhoodpredictionmarkets 2026

Name: UFC Fight Night: Ricky Simon vs. Montel Jackson (Bantamweight, Prelims)
Start: 2026-09-12T22:00:57.000Z
End: 2026-09-27T03:59:59.999Z

Platform comparison

Platform	YES odds	NO odds	Fee	KYC	Settlement
Polymarket (via Robinhood Prediction Markets) Pick polygram.ink (preferred broker)	100%	0%	0% (USDC on-chain)	No-KYC up to $1,500	USDC, auto via UMA oracle	Go to the live market →
Polymarket (direct) polymarket.com	100%	0%	0%	Geo-blocked in US/UK/EU	USDC, on-chain	Go to the live market →
Kalshi kalshi.com	—	—	Up to 7% per trade	US-only, KYC required	USD	Go to the live market →
Betfair Exchange betfair.com	—	—	2-5% commission	Full KYC from first trade	GBP / EUR	Go to the live market →
Manifold Markets manifold.markets	—	—	Play-money (mana)	None — play-money	Mana (no cash-out)	Go to the live market →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

Outcome	Probability
Fight won by KO/TKO?	100%
Jackson to win by KO/TKO?	100%
O/U 0.5 Rounds	100%
O/U 1.5 Rounds	100%
Ends before Round 3?	100%
Jackson in Round 2	100%
Ricky Simon vs. Montel Jackson	0%
Fight to Go the Distance?	0%
Simon to win by KO/TKO?	0%
Fight won by submission?	0%
O/U 2.5 Rounds	0%
Fight won by decision?	0%
Ends before Round 2?	0%
Simon in Round 1	0%
Simon in Round 2	0%
Simon in Round 3	0%
Jackson in Round 1	0%
Jackson in Round 3	0%
Decision or Draw	0%

Market context

Traders on decentralised prediction markets give 100% probability to ufc fight night: ricky simon vs. montel jackson (bantamweight, prelims). This market will resolve to "Ricky Simon" if Ricky Simon is officially declared the winner of the fight against Montel Jackson at UFC Fight Night: Rosas Jr. vs. Barcelos, scheduled for September 26, 2…

Live Data & Statistics

The Polymarket order book prices Fight won by KO/TKO? at 100% for "UFC Fight Night: Ricky Simon vs. Montel Jackson (Bantamweight, Prelims)".

Fight won by KO/TKO? 100% Other 0%

Live stats load when the match begins. Current market odds are shown above. Trading volume: $211K.

Methodology

We read UFC Fight Night: Ricky Simon vs. Montel Jackson (Bantamweight, Prelims) from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

What does Polymarket cost vs Kalshi?: Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.
Which platform has the deepest liquidity?: Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.
What about Smarkets as an alternative?: Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.
Which platform is accessible globally?: Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.
Which platform supports Klarna/SOFORT?: Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.

Alex ChenPrediction Market Analystand

Jordan LeeSports Prediction Reporter

Trade UFC Fight Night: Ricky Simon vs. Montel Jackson (Ban… on Robinhood Prediction Markets

Live order book, 0% fees, USDC settlement in seconds.

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UFC Fight Night: Ricky Simon vs. Montel Jackson (Bantamweight, Prelims)

Platform comparison

Outcome probabilities

Market context

Live Data & Statistics

Methodology

Resolution & payout

FAQ

Trade UFC Fight Night: Ricky Simon vs. Montel Jackson (Ban… on Robinhood Prediction Markets

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