Top pick for UK-regulated alternative: Smarkets (UKGC, 2% commission, strong politics). Top pick for market breadth: Polymarket via PolyGram remains best-in-class — so if you want a true alternative, Betfair Exchange is the closest like-for-like in the UK. Kalshi is US-only as of 2026.
Looking for a Polymarket alternative in the UK? Whether you want UKGC regulation, GBP deposits, or a different market selection, this guide covers every viable option for British prediction market traders in 2026.
Why UK Traders Look for Polymarket Alternatives
The most common reasons UK traders seek Polymarket alternatives:
- Regulatory comfort: Want UKGC protection and dispute resolution
- GBP simplicity: Want to avoid crypto conversion friction
- Gambling tax treatment: UKGC-licensed winnings are clearly tax-free; Polymarket winnings are ambiguous
- Bank compatibility: Some UK banks restrict crypto purchases
- Specific market types: Sports betting exchanges have deeper sports liquidity for UK events
1. Betfair Exchange — Best UKGC-Regulated Alternative
Betfair Exchange is the UK's dominant prediction market for regulated trading:
- UKGC licensed — full consumer protection
- GBP deposits/withdrawals — Faster Payments, debit cards, PayPal
- Tax-free winnings — treated as gambling under UK law
- 5% commission on wins — higher than Polymarket but lower than traditional bookmakers
- ~500 markets — deep sports liquidity, reasonable politics coverage
- In-play trading on sports events
vs Polymarket: Better regulated, GBP-native, tax-free. But far fewer markets (500 vs 8,400+) and higher fees (5% vs ~1%).
2. Smarkets — Best for UK Politics Markets
Smarkets is a UKGC-licensed prediction exchange particularly strong in political markets:
- 2% commission — half of Betfair, comparable to Polymarket's fees
- UKGC licensed — winnings clearly tax-free
- Strong UK political coverage — elections, leadership contests, by-elections
- GBP deposits — Visa/Mastercard, Faster Payments
- ~200 markets — thinner than Betfair, much thinner than Polymarket
Best for: UK political prediction trading where you want UKGC protection and low commission.
3. Kalshi — Future UK Expansion Watch
Kalshi is the closest philosophical competitor to Polymarket — CFTC-regulated event contracts in the USA:
- US only as of June 2026 — UK residents cannot open accounts
- ~500 markets covering politics, economics, weather, sports
- ~1% effective fees — similar to Polymarket
- USD-denominated — no GBP option
Kalshi has indicated interest in international expansion. If they launch UK operations, they would likely require UKGC licensing — which could take 12–24 months from announcement.
4. Manifold Markets — Best Free-to-Play Alternative
Manifold Markets is a prediction market that uses play-money ("Mana") rather than real money:
- No real money — risk-free practice
- 50,000+ markets — most active community platform by market count
- Great for learning — understand prediction market mechanics before risking real money
- Limited usefulness for serious traders — no financial incentive means less accurate pricing
5. Polymarket via PolyGram — Not an Alternative but Worth Repeating
If the reason you're looking for alternatives is friction with direct Polymarket access, PolyGram solves most of them:
- UK debit card deposits (Visa/Mastercard) — no crypto exchange account needed
- Klarna buy-now-pay-later available
- Email-based login — no MetaMask or crypto wallet setup
- Full Polymarket catalogue — 8,400+ markets vs 200–500 on UK alternatives
Side-by-Side Comparison
| Platform | UKGC | GBP | Tax-Free? | Commission | Markets |
|---|---|---|---|---|---|
| Betfair Exchange | ✅ | ✅ | ✅ | 5% | ~500 |
| Smarkets | ✅ | ✅ | ✅ | 2% | ~200 |
| Betdaq | ✅ | ✅ | ✅ | 2% | ~150 |
| Kalshi | ❌ US only | ❌ | N/A | ~1% | ~500 |
| Metaculus | ❌ | N/A | N/A (no $) | Free | 5,000+ |
| Polymarket (PolyGram) | ❌ | Via crypto | Uncertain | ~1% | 8,400+ |
FAQ — Polymarket Alternative UK
- Is there a UK-regulated version of Polymarket?
- Not yet. Polymarket is an on-chain protocol and does not have a UKGC-licensed entity. The closest UK-regulated alternatives with a similar model are Smarkets (2% commission) and Betfair Exchange (5% commission).
- Can I use Betfair as a Polymarket alternative for crypto markets?
- No — Betfair does not offer crypto price prediction markets. For crypto event markets (e.g. "Will Bitcoin hit £200,000?"), Polymarket via PolyGram is the only liquid venue accessible to UK traders.