During the World Cup, Kalshi's trading volume reached $54.338 billion, with Kalshi and Polymarket together accounting for over 95% of the market share.

According to Odaily Planet Daily, Kalshi's total transaction volume across all platforms reached $54.338 billion during the World Cup, approximately 2.6 times that of Polymarket's $20.988 billion. World Cup-related event transactions reached $13.591 billion, exceeding Polymarket's $10.356 billion by about 31%. In terms of user growth, the Kalshi app saw 5.368 million downloads, surpassing Polymarket's 2.136 million. Polymarket's website traffic reached 57.44 million visits. Other platforms saw significant growth: Predict.fun's total transaction volume was $1.092 billion, with World Cup-related transactions reaching $886 million; Opinion's total transaction volume was $1.137 billion, with approximately $561 million related to the World Cup; and Limitless's total transaction volume was $446 million, with approximately $220 million related to the World Cup. Kalshi and Polymarket together accounted for over 95% of the market share.