Prediction Market Apps 2026
As of 2026-09-19. DeFi Rate week of 7–13 Sep 2026: Kalshi $12.98B 1st, Polymarket US $1.321B 2nd, Polymarket Global $1.12B 3rd.
As of 19 September 2026. The main table uses DeFi Rate contract volume for the week of 7–13 Sep 2026, updated 2026-09-16 after Polymarket US posted the missing daily reports. Kalshi is 1st at $12.98B, Polymarket US 2nd at $1.321B, Polymarket Global 3rd at $1.12B. Event contracts can go to zero. Licensing differs by place. This page does not tell anyone to trade.
Top three by that week’s volume
Kalshi and Polymarket Global together did $14.10B. The US venue is booked separately. As of 13 September, open interest was 677.18 million contracts on Kalshi, 321.34 million on Polymarket Global, and 167.22 million on Polymarket US. Those are contract counts, not dollars, so they stay off the volume table. League of Legends LPL playoff contracts appeared on Polymarket Global’s large-ticket list that week: Anyone’s Legend vs Invictus Gaming, $10.17 million.
| # | App | Week volume | Status |
|---|---|---|---|
| 1 | Kalshi | $12.98 B | CFTC DCM |
| 2 | Polymarket US | $1.321 B | CFTC DCM |
| 3 | Polymarket Global | $1.12 B | International |
How this list is ranked
As of 2026-09-19. The main table uses DeFi Rate contract volume for the week of 7–13 Sep 2026, updated 2026-09-16 after Polymarket US posted the missing daily reports. Event contracts can go to zero. Licensing differs by place. This page does not tell anyone to trade.
| Source | Snapshot | Scope | Weight |
|---|---|---|---|
| DeFi Rate: Prediction Markets Surge to $14.1B As NFL Season Kicks Off | week 7–13 Sep 2026; updated 2026-09-16 | Kalshi $12.98B, Polymarket US $1.321B, Polymarket Global $1.12B. Kalshi + Polymarket Global $14.10B combined; the US venue is counted separately | Primary |
| The Block: Kalshi, Polymarket volume in July | calendar month 2026-07 | Kalshi $37.7B, Polymarket international $7.9B, Polymarket US $5B; three venues $50.6B combined. Yahoo / Covers reprint the same set | Secondary (full month) |
| DeFi Rate Prediction Market Volume | 2026-09-19 live rolling | Kalshi 30-day $14.9B; Polymarket 30-day $3.1B (decentralized listing on that page) | Secondary (rolling window) |
| Pew Research Center on prediction-market volume | published 27 May 2026; figures through April 2026 | combined monthly Kalshi + Polymarket from under $5B in Sep 2025 to about $24B in Apr 2026. April: Polymarket US $1.3B, international $9B. Notional taker volume at $1 face | Secondary (earlier month) |
| DeFi Rate: prediction market apps in the US | page dated 11 Sep 2026 | eight live US venues. Names without a published week volume stay off the main table | Secondary (live roster) |
| The Block monthly volume dashboard | live chart | monthly series; use the prose figures when the chart does not print a cell | Secondary (dashboard) |
July 2026 calendar month
The Block printed Kalshi at $37.7B, Polymarket international at $7.9B, Polymarket US at $5B, $50.6B across the three. That month the international venue still beat the US venue. By the week of 7–13 Sep 2026, the US venue had moved ahead of Global.
| # | App | Month volume |
|---|---|---|
| 1 | Kalshi | $37.7 B |
| 2 | Polymarket Global | $7.9 B |
| 3 | Polymarket US | $5 B |
30-day rolling as of this page
DeFi Rate’s volume page live: Kalshi $14.9B over 30 days, Polymarket $3.1B over 30 days.
Live US venues
DeFi Rate’s 11 September 2026 page lists eight live venues. Names without a published week volume stay off the main table. Robinhood event contracts route to ForecastEx.
| App | Status | CFTC |
|---|---|---|
| Kalshi | Live | DCM, DCO |
| Polymarket US | Live | DCM, DCO |
| Gemini Predictions | Live | DCO, DCM |
| FanDuel Predicts | Live | Partner DCM / CME |
| DraftKings Predictions | Live | DCM, IB |
| OG Predictions | Live | Partner DCM / Crypto.com |
| Underdog Predict | Live | FCM |
| ForecastEx | Live | DCO, DCM; Robinhood order flow |
Related
Single-fund size: largest ETFs. Asset managers: global asset managers.
互动体验：拖拽排位《Prediction Market Apps 2026》
Prediction Market Apps 2026
想打造自己的个性化天梯图并开放给读者嵌入吗？