In this guide
Kalshi in the UK: The Problem
Kalshi operates as a US-regulated prediction market under CFTC licensing. The platform restricts access exclusively to United States residents — users based in the UK face geographical blocking and cannot establish accounts. For those seeking a Kalshi substitute that functions within the UK, PolyGram stands out as the most comparable option, delivering a broader 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 virtual currency, no genuine financial exposure
- Metaculus — Crowd forecasting service, no actual money involved
- Betfair Exchange — Licensed UK betting exchange featuring political prediction markets
When considering genuine-money prediction markets accessible from the UK, PolyGram and Polymarket provide unmatched trading depth and the most comprehensive catalogue of markets among all UK-compliant platforms.
Verdict
PolyGram represents the superior Kalshi alternative for UK-based traders throughout 2026 — it offers substantially larger markets, eliminates trading fees entirely, and imposes no geographical restrictions.