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.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

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. Kalshi 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.

86% Yes — Ravens vs. Colts — Exchange Comparison | Kalshi Alternative

Name: Ravens vs. Colts
Start: 2026-08-04T12:00:33.000Z
End: 2026-09-13T17:00:00.000Z

Platform comparison

Platform	YES odds	NO odds	Fee	KYC	Settlement
Polymarket (via Kalshi Alternative) Pick polygram.ink (preferred broker)	86%	14%	0% (USDC on-chain)	No-KYC up to $1,500	USDC, auto via UMA oracle	Go to the live market →
Polymarket (direct) polymarket.com	86%	14%	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
O/U 33.5	86%
O/U 35.5	83%
3Q O/U 3.5	79%
1Q O/U 3.5	78%
4Q O/U 7.5	75%
O/U 39.5	72%
2H O/U 17.5	71%
1Q O/U 6.5	70%
O/U 31.5	67%
O/U 37.5	67%
O/U 29.5	65%
3Q O/U 6.5	65%
O/U 43.5	64%
Ravens vs. Colts	62%
2H O/U 20.5	62%
Spread -1.5	59%
O/U 45.5	59%
1H Moneyline	59%
Both Teams to Score Points - 2Q	57%
Both Teams to Score Points - 4Q	57%
O/U 46.5	56%
Spread -2.5	56%
Both Teams to Score Points - 1Q	56%
Both Teams to Score Points - 3Q	56%
Ravens 1H O/U 12.5	55%
Ravens O/U 23.5	54%
O/U 41.5	53%
4Q O/U 10.5	53%
Ravens O/U 20.5	53%
O/U 47.5	52%
1H O/U 23.5	52%
2H O/U 23.5	52%
2H O/U 29.5	52%
4Q O/U 16.5	52%
1H Spread -1.5	52%
Colts 1H O/U 10.5	51%
2H O/U 26.5	51%
3Q O/U 9.5	51%
3Q O/U 12.5	51%
3Q Moneyline	51%
Colts O/U 16.5	51%
Colts O/U 25.5	51%
Safety?	51%
Team to Record Longest FG	51%
Ravens Total Touchdowns: O/U 2.5	51%
Colts Total Touchdowns: O/U 2.5	51%
Ravens Total Offensive Yards: O/U 350.5	51%
Colts Total Offensive Yards: O/U 350.5	51%
1H Spread -2.5	51%
2H Moneyline	50%
1Q O/U 9.5	50%
1Q Moneyline	50%
Colts 1H O/U 8.5	50%
Colts 1H O/U 12.5	50%
Ravens 1H O/U 10.5	50%
Ravens 1H O/U 14.5	50%
1Q Spread -4.5	50%
2H Spread -0.5	50%
2Q Spread -0.5	50%
2Q O/U 8.5	50%
2Q O/U 11.5	50%
2Q Moneyline	50%
3Q Spread -0.5	50%
4Q Spread -0.5	50%
4Q O/U 13.5	50%
4Q O/U 19.5	50%
4Q Moneyline	50%
Ravens 2H O/U 11.5	50%
Ravens 2H O/U 13.5	50%
Ravens 2H O/U 15.5	50%
2Q Spread -4.5	50%
3Q Spread -4.5	50%
4Q Spread -4.5	50%
Colts O/U 28.5	50%
Colts 2H O/U 8.5	50%
Colts 2H O/U 10.5	50%
Colts 2H O/U 12.5	50%
Ravens vs. Colts: Total Two-Point Conversions O/U 0.5	50%
3Q O/U 15.5	49%
Ravens O/U 26.5	49%
Colts O/U 19.5	49%
Exact Margin: Ravens by 13-18	49%
Exact Margin: Colts by 14-20	49%
O/U 48.5	48%
Exact Margin: Ravens by 25+	48%
Exact Margin: Ravens by 19-24	48%
Exact Margin: Ravens by 7-12	48%
Exact Margin: Colts by 1-6	48%
Exact Margin: Colts by 7-13	48%
Exact Margin: Colts by 21+	48%
Spread -3.5	47%
2Q Spread -1.5	47%
2Q O/U 14.5	47%
Colts O/U 22.5	47%
Exact Margin: Ravens by 1-6	47%
O/U 49.5	46%
Spread -4.5	44%
1H O/U 24.5	44%
O/U 50.5	43%
1Q Spread -1.5	43%
1Q O/U 12.5	43%
3Q Spread -2.5	43%
Ravens O/U 29.5	43%
Ravens O/U 32.5	42%
2H Spread -1.5	41%
3Q Spread -1.5	41%
4Q Spread -2.5	41%
Spread -6.5	40%
2Q Spread -2.5	39%
O/U 51.5	38%
1Q O/U 15.5	38%
4Q Spread -1.5	37%
O/U 52.5	36%
2H Spread -2.5	36%
O/U 53.5	34%
O/U 65.5	34%
1Q Spread -3.5	34%
4Q Spread -3.5	34%
1Q Spread -0.5	30%
1Q Spread -2.5	30%
2H Spread -3.5	30%
2Q Spread -3.5	30%
3Q Spread -3.5	29%
2H Spread -4.5	27%
O/U 55.5	24%
O/U 57.5	22%
2Q O/U 17.5	21%
O/U 59.5	19%
O/U 61.5	16%
2Q O/U 20.5	14%
O/U 63.5	13%
O/U 67.5	11%
O/U 69.5	6%
Exact Margin: Tie	1%

Market context

Ravens vs. Colts — current market-implied probability: 86%. In the upcoming NFL game, scheduled for September 13 at 1:00PM ET: If Ravens wins, the market will resolve to "Ravens". If Colts wins, the market will resolve to "Colts". If the game is postponed, thi…

Live Data & Statistics

The Polymarket order book prices O/U 33.5 at 86% for "Ravens vs. Colts".

O/U 33.5 86% Other 14%

Live stats load when the match begins. Current market odds are shown above. Trading volume: $87K.

Methodology

We read Ravens vs. Colts 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

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

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.
Is Betfair a Polymarket alternative?: Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.
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. Kalshi 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.

Chris ReedPolitical Forecasting Editorand

Maya TorresFinancial Markets Writer

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Ravens vs. Colts

Platform comparison

Outcome probabilities

Market context

Live Data & Statistics

Methodology

Resolution & payout

FAQ

Trade Ravens vs. Colts on Kalshi Alternative

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