Polymarket$3.30BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$381.46MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$27.64MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.Compare Counter-Strike: Natus Vincere vs B8 (BO3) - BLAST Open Rotterdam Group A prediction market odds side by side across Polymarket, Kalshi. Platforms show similar odds, with an average spread of just 0.0pp. Close agreement often signals strong market consensus. With $1.06M in combined trading volume across 3 outcomes, this is one of the most actively traded cross-platform prediction markets.
| Outcome | Polymarket | Kalshi | Spread |
|---|---|---|---|
 Yes | 100%+1.0 | - | - |
N Natus Vincere | - | 99%+23.0 | - |
B |
| - |
1%-23.0 |
| - |
