StarkWare opened OffMarket to the public on October 14, allowing traders to use Polymarket without publicly linking their positions to their primary blockchain wallets. The service layers privacy technology over the prediction market while leaving its markets and prices unchanged, following a limited-access phase that began in August.

Polymarket is a prediction market where users trade on the outcomes of real-world events, and its trading activity is recorded on public blockchains, positions have normally been traceable back to the wallets that hold them. OffMarket operates independently of Polymarket and does not require users to open a Polymarket account.

Wallet Separation Through Starknet

OffMarket relies on Starknet's privacy pool and zero-knowledge proofs — cryptographic proofs that verify a statement without revealing the underlying data — to conceal how deposited funds connect to the wallets used for trading. Users sign in with Google or a crypto wallet, then deposit USDC through Polygon. The service creates a separate wallet for each position, and users control their keys through their browsers, with wallets recoverable via their signatures.

StarkWare said deposits currently carry a $1,000 USDC limit per account. Funds remain in an open-source pool rather than an account controlled by OffMarket.

Orders Tap Polymarket Liquidity

OffMarket sends orders to Polymarket's existing order books. Traders deal with the same buyers and sellers at the same prices, rather than joining a separate market with fewer orders. A company spokesperson said private orders take about one minute to execute.

The release comes as Polymarket faces questions about a possible token or public listing, though neither proposal forms part of OffMarket's trading service. StarkWare's product belongs to Polymarket's verified builder program, but the companies have no formal partnership.

Privacy Does Not Hide Every Transaction

Trades remain visible on Polygon, including their size, timing, and associated wallet addresses. OffMarket conceals the link to a user's original account, not the underlying activity, so observers may still identify traders from distinctive transactions. The platform's normal trading fees also apply to private orders, and the privacy design does not remove the records that Polymarket maintains.

Separately, US authorities are debating new rules for prediction market contracts, leaving the regulatory framework for those products still unsettled.

Access Restrictions and Compliance Remain

StarkWare says the shared Starknet privacy pool holds about $1.5 million across 17,000 deposits. A compliance company holds a viewing key for sanctions checks and properly authorized information requests.

OffMarket follows Polymarket's geographic restrictions, excluding users in the United States. Those limits remain in place amid a court dispute over prediction market oversight.

StarkWare has not released public trading volume figures for OffMarket's early trial, and the company says it may revise deposit limits as activity changes. The public launch makes the service available beyond its earlier invitation stages. From here, deposit-limit revisions, the pool's reported size, and the outcome of the US rulemaking debate and oversight dispute are the main publicly trackable indicators of how the service develops. Withdrawals usually take several minutes, the spokesperson said.

Source: CoinCentral