In this guide
Kalshi in the UK: The Problem
Kalshi operates as a US-based prediction market under CFTC regulation. The platform restricts access to United States residents exclusively — individuals in the UK face geographical blocking and cannot establish accounts. For those seeking a comparable Kalshi substitute that operates within the UK, PolyGram delivers an equivalent experience alongside an expanded range of available markets.
PolyGram vs Kalshi: Direct Comparison
| Feature | Kalshi | PolyGram (via Polymarket) |
|---|---|---|
| UK availability | ❌ US only | ✅ Full UK access |
| Regulation | CFTC-licensed | On-chain / UMA oracle |
| Settlement | USD | USDC (Polygon) |
| Trading fee | Up to 2.5% | 0% on PolyGram |
| Market volume | Moderate | $10B+ lifetime (Polymarket) |
| Market types | Politics, economics | Politics, sports, crypto, world events |
| API access | Yes (US) | Yes (CLOB API) |
| Mobile app | iOS/Android | PWA (iOS/Android) |
Other Kalshi Alternatives
- Manifold Markets — Prediction market using play money, without genuine financial exposure
- Metaculus — Forecasting service, trading with real capital unavailable
- Betfair Exchange — Wagering exchange operating under UK licence, featuring political outcome markets
Among genuine-money prediction markets accessible to UK participants, PolyGram/Polymarket stands out for its exceptional trading depth and comprehensive catalogue of available markets across all competing UK-authorised venues.
Verdict
For UK-based traders in 2026, PolyGram represents the superior Kalshi substitute — boasting more extensive market offerings, no trading charges, and unrestricted geographical access.