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 |
|---|---|
| Completed Match | 100% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Set 2 O/U 8.5 | 100% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Set Handicap +/-1.5 | 100% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Set 1 O/U 8.5 | 100% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Set 2 O/U 9.5 | 100% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Set 2 O/U 10.5 | 100% |
| National Bank Open: Jenson Brooksby vs Ben Shelton | 0% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Total Sets: O/U 2.5 | 0% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Set 1 Winner | 0% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Match O/U 21.5 | 0% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Set 2 Winner | 0% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Match O/U 22.5 | 0% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Set 1 O/U 9.5 | 0% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Match O/U 23.5 | 0% |
| National Bank Open: Jenson Brooksby vs Ben Shelton Set 1 O/U 10.5 | 0% |
Market context
Traders on decentralised prediction markets give 100% probability to national bank open: jenson brooksby vs ben shelton. This market refers to the tennis match between Jenson Brooksby and Ben Shelton in the National Bank Open, originally scheduled for August 6, 2026 at 10:00AM ET. This market will resolve to 'Jenson Br…
Methodology
We read National Bank Open: Jenson Brooksby vs Ben Shelton 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
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.
UK Frequently Asked Questions
- 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.
- 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.
- Polymarket vs Betfair Exchange: which is better for UK prediction trading?
- Betfair Exchange offers UKGC regulation, GBP settlement, and potentially tax-free winnings — but focuses on sports and politics only. Polymarket has deeper liquidity, 0% platform fee, global event coverage, and crypto/geopolitical markets Betfair doesn't offer. For UK traders: Betfair for regulated GBP sports markets; Polymarket for broader, global prediction events.
- Is Kalshi available in the UK?
- Kalshi is a US CFTC-regulated prediction exchange. UK residents can create accounts but must use USD and US payment methods. Kalshi's product range overlaps with Polymarket but with lower liquidity on most contracts. For UK traders, Polymarket typically offers better prices due to higher global volume.
Trade National Bank Open: Jenson Brooksby vs Ben Shelton on Kalshi Alternative UK
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