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Prediction market operators

Compare backend-reported active markets, traded volume, open interest, detected categories, and freshness across every prediction market venue currently tracked by AllTop Markets.

Operators tracked
3
Backend provider profiles
24h volume
$441.6M
Provider rollup
Highest active market count
Polymarket
164,144 active markets
Open interest
$1.1B
Provider-reported liquidity
01 · Operator coverageClick any operator for its live provider profile and market list
K
Kalshi
Last tick 6h ago · stale
$374.5M
24h volume

Kalshi prediction-market exchange catalog, trades, state, orderbook, and OI ingestion.

Active markets
80,081
Open interest
$492.2M
Categories
23
80,081 active marketsOpen profile →
P
Polymarket
Last tick 6h ago · stale
$67.0M
24h volume

Polymarket global Gamma discovery plus CLOB market-data ingestion.

Active markets
164,144
Open interest
$496.1M
Categories
23
164,144 active marketsOpen profile →
US
Polymarket US
Last tick 6h ago · stale
$29K
24h volume

Polymarket US gateway search, BBO, book, cumulative notional, and OI ingestion.

Active markets
4,981
Open interest
$62.1M
Categories
14
4,981 active marketsOpen profile →
02 · ComparisonKey metrics across all tracked venues
OperatorSurfaceActive markets24h volumeOpen interestCategoriesFreshness
KKalshiExchange80,081$374.5M$492.2MSports, Uncategorized, Politics, Culture +19Last tick 6h ago · stale
PPolymarketGamma Clob164,144$67.0M$496.1MSports, Crypto, Midterms, Politics +19Last tick 6h ago · stale
USPolymarket USGateway4,981$29K$62.1MSports, Culture, Politics, Win Totals +10Last tick 6h ago · stale
Prediction market operators