Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi Alternative) 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 |
|---|---|
| O/U 0.5 | 100% |
| Inter Milano O/U 0.5 | 100% |
| 2nd Half O/U 0.5 | 100% |
| Inter Milano 2nd Half O/U 0.5 | 100% |
| Inter Milano (-1.5) | 0% |
| Real Betis Seville (-1.5) | 0% |
| Inter Milano (-2.5) | 0% |
| Real Betis Seville (-2.5) | 0% |
| O/U 1.5 | 0% |
| O/U 2.5 | 0% |
| O/U 3.5 | 0% |
| O/U 4.5 | 0% |
| O/U 5.5 | 0% |
| Both Teams to Score | 0% |
| Both Teams to Score in First Half | 0% |
| 1st Half O/U 0.5 | 0% |
| 1st Half O/U 1.5 | 0% |
| 1st Half O/U 2.5 | 0% |
| Inter Milano O/U 1.5 | 0% |
| Inter Milano O/U 2.5 | 0% |
| Real Betis Seville O/U 0.5 | 0% |
| Real Betis Seville O/U 1.5 | 0% |
| Real Betis Seville O/U 2.5 | 0% |
| Inter Milano 1st Half O/U 0.5 | 0% |
| Inter Milano 1st Half O/U 1.5 | 0% |
| Real Betis Seville 1st Half O/U 0.5 | 0% |
| Real Betis Seville 1st Half O/U 1.5 | 0% |
| Both Teams to Score in Second Half | 0% |
| 2nd Half O/U 1.5 | 0% |
| 2nd Half O/U 2.5 | 0% |
| Inter Milano 2nd Half O/U 1.5 | 0% |
| Real Betis Seville 2nd Half O/U 0.5 | 0% |
| Real Betis Seville 2nd Half O/U 1.5 | 0% |
Market context
Inter Milan and Real Betis Seville will contest a pre-season friendly on 15 August 2026 at 1:30 PM ET. The match forms part of both clubs' summer preparation cycles ahead of the 2026–27 domestic seasons. Inter, based in Serie A, typically use August friendlies to integrate new signings and test tactical setups. Betis, competing in La Liga, follow a similar schedule. The 0% implied probability on this market suggests either sparse liquidity, a settlement ambiguity, or that traders have not yet positioned ahead of the fixture.
Comparable club-friendly markets across platforms reveal divergent liquidity patterns. Polymarket's decimal-odds format (1.01–1.99 range for heavily skewed outcomes) often attracts retail flow on high-profile European fixtures, whilst Kalshi's binary YES/NO structure and KYC requirements typically concentrate volume on domestic US sports. Betfair and Smarkets, operating under UK gambling regulation, charge commission on winnings rather than flat fees, which alters effective odds for small-stake traders. The current zero probability here suggests this particular market has not yet attracted sufficient cross-platform arbitrage interest to establish a consensus line.
Traders should monitor team news releases in early August for injury updates, squad rotations, and confirmed lineups. Pre-season friendlies are sensitive to last-minute cancellations or venue changes; official confirmation from both clubs' media channels typically arrives 48–72 hours before kickoff. Fixture postponements due to logistical issues or player availability have occurred in previous summer cycles, making settlement clarity essential before committing capital.
Methodology
We read Inter Milano vs. Real Betis Seville - More Markets 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.
- 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. 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.
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