Polymarket, the crypto-native prediction market, has begun supporting instant Bitcoin deposits over the Lightning Network. The feature uses infrastructure from Spark, a Bitcoin protocol built for payments and stablecoins.
In a post on X, Spark told users they can deposit BTC to the platform with more speed and more privacy than the older method offered.
The move extends a funding push that started in October 2025, when Polymarket switched on standard on-chain Bitcoin deposits. Those deposits carried a wait: most on-chain Bitcoin transactions need three to six confirmations, a window of 10 to 60 minutes, before a platform credits an account.
The on-chain route carried a higher minimum deposit, a reflection of bridging costs. For a trader who wants a position on a live market, both the delay and the fee are a cost.
Lightning and Spark close the gap. Spark validates a Bitcoin transaction at the moment it broadcasts, checking for double-spend risk, fee adequacy, and replace-by-fee flags.
