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 |
|---|---|
| O/U 0.5 | 100% |
| O/U 1.5 | 100% |
| Both Teams to Score | 100% |
| St. Louis City SC O/U 0.5 | 100% |
| Real Salt Lake 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% |
| St. Louis City SC 2nd Half O/U 0.5 | 100% |
| Real Salt Lake 2nd Half O/U 0.5 | 100% |
| St. Louis City SC (-1.5) | 0% |
| Real Salt Lake (-1.5) | 0% |
| St. Louis City SC (-2.5) | 0% |
| Real Salt Lake (-2.5) | 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 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% |
| St. Louis City SC O/U 1.5 | 0% |
| St. Louis City SC O/U 2.5 | 0% |
| Real Salt Lake O/U 1.5 | 0% |
| Real Salt Lake O/U 2.5 | 0% |
| St. Louis City SC 1st Half O/U 0.5 | 0% |
| St. Louis City SC 1st Half O/U 1.5 | 0% |
| Real Salt Lake 1st Half O/U 0.5 | 0% |
| Real Salt Lake 1st Half O/U 1.5 | 0% |
| 2nd Half O/U 2.5 | 0% |
| St. Louis City SC 2nd Half O/U 1.5 | 0% |
| Real Salt Lake 2nd Half O/U 1.5 | 0% |
Market context
St. Louis City SC and Real Salt Lake are the real-world teams behind this “more markets” MLS contract, with kick-off scheduled for 8:30 pm ET on 1 August. On the mainstream books, St. Louis is generally priced as a slight favourite rather than an overwhelming one: recent moneyline ranges cluster around St. Louis at roughly +110 to +120 and Real Salt Lake at about +185 to +220, while correct-score and goal markets point to a moderately open game rather than a tight low-scoring one.[7][11][16]
That makes the current **0% YES** crowd price on the “more markets” side stand out as more of a platform-specific wrinkle than a clean read-through from match odds. By comparison, Kalshi markets show this fixture’s first-team-to-score contract trading at 74¢ for a “yes” outcome for St. Louis, with the opposite side far higher than zero, which underlines how different contracts on the same match can imply very different probabilities depending on the question being asked.[18] Polymarket, meanwhile, lists a separate MLS market for the fixture, while traditional books quote decimal odds with built-in margin; Kalshi and Polymarket use contract prices that map directly to implied probability, but fees, liquidity, and KYC access can differ materially by venue.[18][19]
For traders, the key catalysts are line-up and late team-news releases, plus any last-minute market re-pricing around expected goals, both-teams-to-score, and correct-score positions. Because the settlement window runs shortly after kick-off, any confirmed absences, rotation signals, or changes to the matchday squad can matter more than early previews, especially on a “more markets” contract that may depend on whether additional derivative markets are posted before lock. Books such as FanDuel, Sportsbet, and others are already showing the usual spread of prices across 1x2, totals, and correct-score markets, so cross-platform moves in the final hours are likely to reflect execution differences as much as pure opinion.[3][11]
Methodology
This page compares St. Louis City SC vs. Real Salt Lake - More Markets 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 Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.
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 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. Kalshi Alternative UK has a different geo footprint and routes to Polymarket's order book at 0% fees.
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