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Point of Focus
- Kalshi led a 30-day prediction-market volume with roughly $12 billion.
- Polymarket generated nearly $50 million in recorded fees.
- Smaller platforms remain far behind, indicating an increasingly concentrated two-player market.
The prediction-market industry is developing into a two-platform contest, but the available data shows Kalshi and Polymarket leading on very different measures.
DefiLlama data places Kalshi comfortably ahead in 30-day trading volume, while Polymarket dominates both recorded fees and total value locked.
The divergence suggests there is no single undisputed market leader: Kalshi is processing more trades, but Polymarket appears to control the sector’s largest pool of onchain capital and fee generation.
The remaining prediction platforms trail the pair by a wide margin, pointing to growing concentration at the top of the market.
Kalshi builds a commanding volume lead
Kalshi generated approximately $12 billion in volume over the measured 30-day period, according to the DefiLlama chart.
Polymarket ranked second with roughly $4.8 billion, giving Kalshi more than twice its rival’s trading activity.
InsightX, OPINION and Predict Fun occupied the next positions, but their volumes were only a fraction of the totals reported for the two leaders. That gap indicates that scale, liquidity and user recognition are increasingly concentrated around Kalshi and Polymarket.
Kalshi’s lead may reflect a high-turnover trading environment and strong demand for its contracts. Volume alone, however, does not reveal how effectively that activity is being monetized.
Polymarket dominates fees and locked capital
The ranking reverses sharply when measured by fees. Polymarket generated close to $50 million during the 30-day period, while Kalshi showed little or no fee revenue in the dataset.
Polymarket also overwhelmingly led the total-value-locked category. This points to a deeper pool of capital committed to its markets, even though its reported trading volume remained well below Kalshi’s.
The contrast may reflect differences in fee structures, reporting methods and platform architecture. It would therefore be premature to treat the fee chart as a direct profitability comparison.
Still, the data indicates that Polymarket’s onchain model is capturing considerably more measurable economic value.
Polymarket’s growth extends beyond elections
Dune data provides further evidence of Polymarket’s expansion. Monthly volume surged during the 2024 US election period, reaching roughly $2.5 billion before retreating in early 2025.
Activity then accelerated dramatically later in 2025, climbing from around $1 billion in August to nearly $3 billion in October. Monthly volume peaked near $9.5 billion in March 2026 before easing to approximately $7.6 billion in April.
That trajectory suggests Polymarket has moved beyond dependence on a single election cycle. Sports, cryptocurrency and other event contracts appear to be supporting broader activity.
The competitive picture is therefore split: Kalshi currently wins on turnover, while Polymarket leads on fees, locked capital and visible onchain momentum. For smaller rivals, the widening gap raises a difficult question: whether the market still has room for a meaningful third contender.
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