In this guide
Kalshi in the UK: The Problem
Kalshi operates under CFTC regulation as a US-based prediction market but restricts access exclusively to American residents through geographic blocking. British and other international users cannot establish accounts on the platform. For those in the UK seeking a comparable prediction market with wider accessibility, PolyGram stands out as the strongest substitute, offering a substantially broader range of tradeable outcomes.
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 — Virtual-currency forecasting venue without genuine monetary exposure
- Metaculus — Crowd-sourced forecasting tool, trading with play money only
- Betfair Exchange — Peer-to-peer wagering platform holding UK licensing, includes political betting options
Among genuine-money outcome markets accessible to UK residents, PolyGram and Polymarket command the strongest order books and most comprehensive event coverage of any authorised venue.
Verdict
PolyGram emerges as the superior Kalshi replacement for British traders in 2026 — boasting richer liquidity pools, no transaction costs, and unrestricted geographic access.