Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi Alternative UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| AS Roma (-1.5) | 100% |
| AS Roma (-2.5) | 100% |
| O/U 0.5 | 100% |
| O/U 1.5 | 100% |
| O/U 2.5 | 100% |
| O/U 3.5 | 100% |
| O/U 4.5 | 100% |
| Both Teams to Score | 100% |
| 1st Half O/U 0.5 | 100% |
| Newport County O/U 0.5 | 100% |
| AS Roma O/U 0.5 | 100% |
| AS Roma O/U 1.5 | 100% |
| AS Roma O/U 2.5 | 100% |
| AS Roma 1st Half O/U 0.5 | 100% |
| Both Teams to Score in Second Half | 100% |
| 2nd Half O/U 0.5 | 100% |
| 2nd Half O/U 1.5 | 100% |
| 2nd Half O/U 2.5 | 100% |
| Newport County 2nd Half O/U 0.5 | 100% |
| AS Roma 2nd Half O/U 0.5 | 100% |
| AS Roma 2nd Half O/U 1.5 | 100% |
| Newport County (-1.5) | 0% |
| Newport County (-2.5) | 0% |
| O/U 5.5 | 0% |
| Both Teams to Score in First Half | 0% |
| 1st Half O/U 1.5 | 0% |
| 1st Half O/U 2.5 | 0% |
| Newport County O/U 1.5 | 0% |
| Newport County O/U 2.5 | 0% |
| Newport County 1st Half O/U 0.5 | 0% |
| Newport County 1st Half O/U 1.5 | 0% |
| AS Roma 1st Half O/U 1.5 | 0% |
| Newport County 2nd Half O/U 1.5 | 0% |
Market context
Newport County are due to host AS Roma in a club friendly at Rodney Parade, and the market is effectively asking how much weight to give a big-name away side against lower-league opposition. Third-party previews lean towards Roma, but not uniformly: Sports Mole prices a Roma win at 51.78%, with 24.67% for the draw and 23.55% for Newport, while other models still leave room for a tighter, lower-scoring game than a mismatch narrative implies.[11][1][3]
For a market sitting at **0% YES** on Polymarket, that matters because the platform is quoting a binary event, whereas Kalshi-style and book-based references are usually easier to compare through implied probability or decimal odds. A Roma-heavy price is broadly consistent with the consensus, but it can still diverge from Betfair or Smarkets once commission is added, and the effective price for a winner market may move more than the headline line suggests because of thinner liquidity and the different fee structure on each venue. Robinhood’s live market on the same fixture has already shown Roma at 86¢, Tie at 9¢ and Newport at 8¢, which underlines how far a platform can skew towards the favourite even when external previews still assign non-trivial draw or upset chances.[6][11]
The main catalysts are team-news, whether the fixture remains on the published schedule, and any late adjustment to format or venue. The match has been listed for 4 August with kickoff around 18:00 GMT / 7:00 pm local time, and there has been no widely reported disruption in the search results, so traders will be watching line-ups and late squad rotation more than macro news.[5][19][18] In practice, a pre-season friendly can move quickly if either club announces a weakened XI, because that changes how comparable the price is across Polymarket, Kalshi, Betfair and Smarkets, especially for ancillary markets tied to goals, halves or correct score rather than the straight result.
Methodology
We read Newport County vs. AS Roma - 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
- Polymarket vs Kalshi — which is better?
- Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.
- 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. Kalshi Alternative UK has a different geo footprint and routes to Polymarket's order book at 0% fees.
- 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 UK 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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