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.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Polymarket Alternative 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.

Connecticut Sun vs. Phoenix Mercury | Polymarket Alternative

Name: Connecticut Sun vs. Phoenix Mercury
Start: 2026-07-04T04:00:29.000Z
End: 2026-07-18T02:00:00.000Z

Platform comparison

Platform	YES odds	NO odds	Fee	KYC	Settlement
Polymarket (via Polymarket Alternative) Pick polygram.ink (preferred broker)	53%	47%	0% (USDC on-chain)	No-KYC up to $1,500	USDC, auto via UMA oracle	Open the market →
Polymarket (direct) polymarket.com	53%	47%	0%	Geo-blocked in US/UK/EU	USDC, on-chain	Open the market →
Kalshi kalshi.com	—	—	Up to 7% per trade	US-only, KYC required	USD	Open the market →
Betfair Exchange betfair.com	—	—	2-5% commission	Full KYC from first trade	GBP / EUR	Open the market →
Manifold Markets manifold.markets	—	—	Play-money (mana)	None — play-money	Mana (no cash-out)	Open the market →

Outcome probabilities

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

Outcome	Probability
O/U 162.5	53%
O/U 163.5	50%
Brittney Griner: Rebounds O/U 6.5	49%
Spread -4.5	49%
Brittney Griner: Points O/U 14.5	48%
O/U 164.5	47%
Spread -5.5	45%
Olivia Nelson-Ododa: Rebounds O/U 6.5	43%
Connecticut Sun vs. Phoenix Mercury	38%
Alyssa Thomas: Rebounds O/U 6.5	35%
Olivia Nelson-Ododa: Rebounds O/U 7.5	34%
Brittney Griner: Rebounds O/U 5.5	34%
Leïla Lacan: Assists O/U 4.5	33%
Diamond Miller: Points O/U 8.5	32%
Charlisse Leger-Walker: Points O/U 8.5	32%
Leïla Lacan: Points O/U 12.5	31%
Olivia Nelson-Ododa: Points O/U 11.5	31%
Charlisse Leger-Walker: Assists O/U 3.5	31%
Brittney Griner: Points O/U 13.5	31%
Alyssa Thomas: Points O/U 14.5	30%
Alyssa Thomas: Assists O/U 8.5	27%
Charlisse Leger-Walker: Rebounds O/U 3.5	23%

Market context

Live Polymarket data shows 53% YES probability for Connecticut Sun vs. Phoenix Mercury. In the upcoming WNBA game, scheduled for July 17 at 10:00PM ET: If the Connecticut Sun win, the market will resolve to "Connecticut Sun". If the Phoenix Mercury win, the market will resolve to "Phoeni…

Live Data & Statistics

The Polymarket order book prices O/U 162.5 at 53% for "Connecticut Sun vs. Phoenix Mercury".

O/U 162.5 53% Other 47%

Live stats load when the match begins. Current market odds are shown above. Trading volume: $86K.

Methodology

This page compares Connecticut Sun vs. Phoenix Mercury specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

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.
Are all these platforms regulated?: No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.
Which platform supports Klarna/SOFORT?: Directly: none. Polymarket accepts only USDC on Polygon. Polymarket Alternative 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 Connecticut Sun vs. Phoenix Mercury on Polymarket Alternative

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

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Connecticut Sun vs. Phoenix Mercury

Platform comparison

Outcome probabilities

Market context

Live Data & Statistics

Methodology

Resolution & payout

FAQ

Trade Connecticut Sun vs. Phoenix Mercury on Polymarket Alternative

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