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OffMarket hides the public wallet link between your funding identity and the wallet that places a Polymarket trade. It does not hide the trade itself. Once USDC reaches the fresh Polygon wallet used for a position, observers can inspect that wallet’s market, order, timing, amount, holdings and profit-or-loss history. OffMarket is therefore an unlinking layer, not an invisible-betting system.
What OffMarket is designed to hide
OffMarket uses Starknet zero-knowledge technology and a shared privacy pool to separate the address that funds an account from the wallet that trades on Polymarket. StarkWare announced the public launch after a limited August release, according to The Block on October 14, 2026. Orders still execute on Polymarket against the same markets and prices; the privacy feature concerns the path from funding identity to trading wallet, not the market data itself.
The service creates a mathematically derived Polygon wallet for each position. That design changes what a blockchain observer can connect with a simple address search. It does not make the resulting Polygon address private.
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How a deposit becomes a Polymarket position
- You deposit through the Starknet side. USDC enters an OffMarket smart contract rather than going directly from your familiar funding address to a Polymarket wallet.
- The privacy pool breaks the obvious address trail. The contract and pool process the deposit so a public viewer cannot simply read “Starknet depositor X funded Polygon wallet Y.”
- A fresh Polygon wallet is derived. Altcoin Buzz reported that the wallet is derived mathematically from the user’s signature and is created for the individual position.
- USDC is bridged to Polygon. The fresh wallet receives the funds needed to interact with Polymarket.
- The wallet places the order. The Polymarket transaction is made from that new Polygon address, with Polymarket’s normal market, pricing and order mechanics.
- Winnings remain associated with that wallet. The address continues to show the position and its later transfers until funds are withdrawn or moved.
Because every position receives its own wallet, several positions do not automatically appear as one address-based portfolio. That separation is useful for reducing straightforward attribution, but it also means every position creates another public activity record.
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What a public blockchain viewer cannot directly see
The funding address behind a particular Polymarket wallet
The main privacy boundary is the missing one-to-one public link between the original Starknet depositor and the fresh Polygon trading address. A block explorer can show the relevant transactions, but it is not supposed to expose a plain statement identifying which Starknet address funded that specific Polymarket wallet.
A simple public grouping of all your positions
With ordinary address-based tracking, an analyst can collect every market position sent from one wallet. OffMarket’s per-position wallets prevent that basic method from automatically grouping several trades as belonging to one person. The protection is against direct address grouping, not against every possible form of behavioral analysis.
Your spending authority from the service operator
The service is described as non-custodial. The Block reported that keys remain in users’ browsers, while positions are held in Polymarket contracts under wallets derived from the users’ signatures. In that design, the operator is not described as holding a general-purpose key that lets it spend your funds.
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Non-custody does not mean that nobody can observe activity. It describes who controls the signing authority, not whether transactions, positions or outcomes are public.
What remains visible after an OffMarket deposit
| Visible on public networks | What an observer can learn |
|---|---|
| Transfer from the Starknet privacy pool to a Polygon address | That a fresh Polygon address received funds associated with the service’s pool |
| Polygon transaction amounts and timestamps | When funding, orders, settlements and withdrawals occurred, and the size of each transaction |
| Polymarket orders and markets | Which prediction markets the wallet traded, including order activity and market exposure |
| Open and settled positions | The wallet’s holdings, outcomes and resulting profit or loss |
| The fresh wallet’s continuing history | Everything that address does after creation, including later transfers and interactions |
The Block put the limitation plainly: transaction size or timing can still identify a trader. Altcoin Buzz summarized the boundary as, “The bet stays public, the person behind it does not.” That is a useful description only if “person” means the direct on-chain identity link; it is not a promise that a determined analyst can never make an attribution.
Can blockchain analysts still trace OffMarket trades?
Yes, but the result is an inference rather than the simple wallet lookup that OffMarket is intended to defeat. Analysts can compare the pool-to-wallet transfer with activity on Polygon and Polymarket, looking for distinctive combinations of amount, timing and subsequent behavior.
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- Timing correlation: a deposit followed by an order at an unusually precise time can narrow the set of possible users, especially when an observer already knows when someone acted off-chain.
- Amount correlation: an uncommon funding amount, withdrawal amount or sequence of amounts can act like a fingerprint.
- Position behavior: repeated market choices, trading cadence and settlement patterns can connect separate fresh wallets statistically, even when no single transaction proves common ownership.
- External information: a trader who publicly announces a bet, reveals a position, or uses a known exchange account to fund or withdraw can create an additional correlation point.
A fresh wallet reduces direct attribution; it does not erase metadata. The more distinctive the timing and amounts, and the more information an observer has from outside the chain, the weaker the practical anonymity can become. Conversely, a generic amount and a busy period may provide less useful correlation evidence. Neither outcome changes the fact that the trade itself remains public.
Custody, wallet recovery and the viewing-key arrangement
Who controls the trading keys?
The Block’s description says OffMarket is fully non-custodial, with keys retained in users’ browsers. Positions are held in Polymarket contracts under wallets derived from user signatures. If the service goes offline, users are reported to be able to recover those wallets rather than losing access solely because the front end disappeared.
Recovery still depends on preserving the relevant signing material and following the service’s recovery process. A non-custodial architecture reduces operator control; it does not remove the user’s responsibility for browser security, backups or signing decisions.
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What can a compliance viewing key do?
The compliance model is separate from spending control. The Block reported that Financial Privacy Inc. keeps a master viewing key in a secure enclave, screens deposits against sanctions lists and reviews legally grounded requests. The key is described as a way to reconstruct covered transaction information, not as a key that authorizes spending.
Altcoin Buzz likewise described viewing-key escrow and quoted the contract’s public statement: “The contract is public and immutable. No administrator can access your funds or see your balance.” Read together, these claims define two different boundaries: administrators are not described as having direct fund access, while a legally scoped viewing process can disclose information covered by the arrangement. A viewing key is therefore not equivalent to absolute secrecy from the operator, compliance personnel or legally authorized investigators.
Operational limits reported at launch
| Item | Reported detail | Qualification |
|---|---|---|
| Early deposit cap | $1,000 USDC per account | Applied during the early release; later limits may differ |
| Private-order execution | Approximately one minute | The Block’s reported figure, not a guaranteed service-level time |
| Withdrawals | A few minutes | Reported estimate; network conditions and service status can change it |
| Trading fee | Polymarket’s normal taker fee | OffMarket was reported to add minimal network costs; current fee schedules should be checked before trading |
| Geographic eligibility | Geographic restrictions, including a U.S. ban | Eligibility is jurisdiction-dependent and can change |
| Relationship to Polymarket | Not a Polymarket product or formal partnership | It was reported as part of Polymarket’s verified builder program and subject to builder-code disablement |
These are launch-period details reported in October 2026, not permanent specifications. Check the service’s current terms, supported jurisdictions, deposit ceiling, fees and availability before sending funds.
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Numbers that should not be mistaken for OffMarket usage
The Block cited L2BEAT figures showing approximately $1.5 million across 17,000 deposits in Starknet’s shared privacy pool at the time of its report. That is a measurement of the pool, not a count or dollar total for OffMarket users. It cannot be used to estimate how much Polymarket activity OffMarket handles.
The same report listed combined Polymarket and Polymarket US volume of $14.7 billion in June, $12.9 billion in July, $8.4 billion in August and $13 billion in September 2026. Those figures describe the broader Polymarket businesses, not OffMarket volume. They provide market context only; they do not show that any particular amount was privately routed.
OffMarket compared with ordinary Polymarket wallet use
| Question | Ordinary wallet-based trading | OffMarket flow |
|---|---|---|
| Is the funding address directly tied to the trading address? | Usually yes when the same wallet funds and trades | The public one-to-one link is the feature intended to be removed |
| Are markets, orders and outcomes visible? | Yes | Yes, from the fresh Polygon wallet |
| Can timing and amount reveal patterns? | Yes | Yes; these remain correlation clues |
| Does the operator hold spending keys? | Depends on the wallet and service used | Described as non-custodial, with keys retained in users’ browsers |
| Can a compliance process disclose transaction information? | Depends on the service and jurisdiction | A viewing-key arrangement is reported for sanctions screening and legally grounded requests |
| Does the service change Polymarket’s market or price? | No special market is implied | Orders execute against the same Polymarket markets and prices |
What OffMarket is—and is not—for a privacy decision
It is useful when your concern is direct wallet attribution
OffMarket can make it substantially harder for a casual observer to start with a known funding address and list the Polymarket positions that belong to it. Separate wallets per position also prevent a basic explorer view from presenting your trades as one obvious public portfolio.
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The market, side, order activity, holdings, settlement and profit or loss remain inspectable from the Polygon trading wallet. Anyone who can identify that wallet can see the bet. The system does not turn a public Polymarket market into a confidential one.
It is not a guarantee against attribution
Do not treat a fresh address as proof that no one can connect activity to you. Distinctive amounts, timing, repeated behavior, public statements and off-chain records can all weaken the separation. The strongest accurate claim is narrower: OffMarket removes a straightforward public link between the funding identity and the trading wallet.
A practical privacy checklist before using it
- Confirm that your country or region is eligible; the reported launch restrictions included a U.S. ban.
- Check the current deposit cap instead of relying on the early-release $1,000 USDC limit.
- Assume every position has a public Polygon address and a publicly inspectable trade history.
- Understand that transaction size and timing can be compared with information outside the blockchain.
- Secure the browser-held signing material and learn the wallet-recovery procedure before depositing.
- Read the current viewing-key and compliance terms, including what information can be reconstructed and under what legal process.
- Budget for Polymarket’s normal taker fee and any network costs, and allow for execution or withdrawal times to vary.
- Verify that the service is available and supported at the moment you trade; builder-program status and builder-code access can affect availability.
The accurate bottom line
OffMarket changes the public question from “Which positions belong to this known funding wallet?” to “Who, if anyone, controls this newly created trading wallet?” That is a meaningful privacy improvement for identity-to-position unlinking. It does not conceal the wallet’s Polymarket bets, markets, amounts, timing, holdings or results, and it leaves analysts with correlation clues. Treat it as a non-custodial privacy layer with a defined compliance path—not as anonymous or untraceable trading.
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