Polymarket · The Block
StarkWare launches OffMarket to let Polymarket users trade more privately
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★ Tier-1 Source
StarkWare has launched OffMarket, a privacy service that lets users trade on Polymarket without publicly linking their positions to their accounts.
Key facts
- Polymarket and its U.S. platform generated a record combined $14.7 billion in trading volume in June amid FIFA World Cup fever, 's data, subsequently dropping to $12.9 billion in July, $8.4 billion
- More recently, identifying at least 34,000 trades flagged as possible insider activity between August 2025 and June 2026
- OffMarket shares Starknet's existing privacy pool, which has around $1.5 million and 17,000 deposits, according to L2BEAT figures cited by StarkWare
- Deposits are currently capped at $1,000 USDC per account, with StarkWare planning to adjust the limit according to demand and usage, a spokesperson told The Block
Summary
Polymarket records trades publicly on Polygon, allowing anyone to examine accounts' positions, order sizes, and trading histories. OffMarket uses zero-knowledge technology on Starknet and has been available in a limited release since August. OffMarket is fully non-custodial, with users retaining control of their keys in their browsers, the spokesperson said. Starknet has previously introduced privacy features for other onchain assets.