About PredictionMarkets
Prediction-market prices from the venues themselves, side by side, with the records nobody else keeps: where each venue is open, which outcomes were disputed and how accurate the prices turned out.
Where the prices come from
Open markets and their prices are read from Polymarket’s and Kalshi’s public market data. A price is what traders pay for “Yes” at the time shown, an implied probability. It is not a forecast by this site. Polymarket’s volume is in US dollars; Kalshi’s is in contracts, and the two are never added together.
Our own record
Price lines, the accuracy charts and the dispute list are built from snapshots we take ourselves, starting on the day the site began recording. Nothing is backfilled or estimated: a chart with too few points says so instead of drawing a guess.
Countries and tools
Whether a venue is open in a country is read from the venue’s own terms or a regulator’s notice, kept with that page and the day it was checked. Tools are listed only after we reviewed them; a submission alone does not list anything.
What it does not do
- It does not take bets, hold money or tell you what to trade.
- It does not say a venue is legal where you live. Check your local rules.
- It is not betting or financial advice.
Independent
Not affiliated with Polymarket, Kalshi or any venue or tool named on the site. Links marked “Ad” are paid or affiliate links; they never change a price, a status or a listing.