7,667 open markets tracked
Spot the best prediction market opportunities
See every market in one place, track whale activity, and discover opportunities using cross-platform data and trader analytics.
Free — bookmark markets, follow traders and join the discussion.
Compare Polymarket vs Kalshi →Explore Lobbies
23 lobbies tracked
Markets are moving. Join the room.
Compare the markets
We are tracking 7,667 open markets across Polymarket (2,896 markets, $6.3B volume) and Kalshi (4,771 markets, $1.9B volume). The same question often trades at a different price on each — these are the free tools for finding out where. Updated October 12, 2026.
Browsing is free and needs no account. A free account lets you bookmark the markets you are watching and follow the traders moving them. We never hold funds or place trades.Create a free account →
Polymarket vs Kalshi
Fees, US legality, deposits and the latest synced price gaps on questions both exchanges list — side by side.
- Polymarket
- 2,896 open markets
- Kalshi
- 4,771 open markets
Odds converter
Turn American, decimal and fractional odds into the implied probability a prediction market quotes.
Fee calculator
Work out what a Kalshi trade actually costs, and whether a cheaper sticker price survives the fee.
Breakeven calculator
See the probability a price demands once the trading fee is added, on Kalshi and on Polymarket.
New This Week
Latest News
3 new this weekBreaking down what's moving the markets.





































