Polymarket operates two distinct platforms under one brand: an international decentralized finance (DeFi) application on the Polygon blockchain with no identity checks, and a federally regulated US exchange requiring full identity verification and government approval. Most traders don't realize they're on different platforms, but the distinction matters enormously for custody, settlement, product access, and what happens if a market resolves unexpectedly.

What's the Difference Between Polymarket's Two Venues?

The original Polymarket is a blockchain-based application where users connect a cryptocurrency wallet, hold positions as tokens on the Polygon network, and settle trades in stablecoins (a type of cryptocurrency pegged to the US dollar). There's no account creation, no identity verification, and no intermediary holding your funds. Access is gated by internet address, not by who you are.

Polymarket US is something entirely different. The company acquired a federally licensed exchange in 2025 for a reported $112 million and received regulatory approval from the Commodity Futures Trading Commission (CFTC) in late November 2025. This venue launched on December 2, 2025, and operates as a designated contract market, meaning it's subject to federal derivatives law, clears through a registered clearing organization, and requires users to upload government identification, provide a Social Security number, prove residency, and submit a live selfie before trading.

The practical marker is simple: if you connected a wallet, you're on the international platform. If you uploaded an ID and took a selfie, you're on the US exchange. These are not two doors into one building; they are two separate buildings with different legal frameworks.

How Do Custody, Settlement, and Identity Verification Differ?

The structural differences between the two venues create real consequences for how you trade and what protections apply:

• Custody Model: On the international platform, you hold positions as tokens in a wallet you control, meaning you bear the risks and benefits of self-custody; nobody can freeze your position, but you also can't recover access if you lose your private keys. On the US exchange, funds sit within a regulated system with customer protections, but the venue can restrict, suspend, or close your account under its rulebook.
• Settlement Asset: The international venue settles in stablecoins on Polygon, while the US exchange settles in US dollars through approved intermediaries. This difference affects how you fund your account, how long withdrawals take, and what your tax records look like at year-end.
• Identity Requirements: The international platform has no identity verification; access is gated only by network address. The US exchange requires full verification including government identification, Social Security number, proof of residence, and a liveness check. Identity verification is what enables the US exchange's surveillance apparatus, because regulatory screening lists only work against names.

The US exchange removed its invite-only waitlist in May 2026 and currently reaches users through an iOS application, with other platforms not yet launched. The international platform remains geoblocked from US addresses under a 2022 CFTC settlement that carried a $1.4 million penalty, and is separately blocked in more than twenty other countries.

What Markets Can You Trade on Each Platform?

The product scope differs sharply between the two venues, and the difference is not a business decision but a legal one. A designated contract market like Polymarket US lists contracts under federal derivatives law and must comply with review provisions that constrain what it may offer. The international venue, operating outside that regulatory perimeter, can list markets the regulated exchange cannot, including contracts tied to armed conflict, leadership changes, and other sensitive developments.

This means two users on what looks like the same platform see materially different universes of tradable questions. A trader on the international platform might find markets unavailable on the US exchange, and vice versa. The difference is not a product strategy but a regulatory boundary.

How Do Resolution and Dispute Handling Work?

International markets resolve through a decentralized optimistic oracle process, with proposals, a challenge window, and token-holder voting on disputes. The regulated US exchange resolves under its rulebook, with the accountability and recourse that a licensed venue's procedures carry. The resolution risk that attaches to every event contract is therefore differently shaped on each side, and it is the risk most often underestimated by traders.

Surveillance and monitoring also differ fundamentally. The US exchange runs layered monitoring including a real-time control desk and a regulatory services agreement with the National Futures Association for trade practice surveillance and sanctions screening. The international platform relies on the transparency of public settlement, where every holder in a contract is visible on the blockchain, supplemented by third-party monitoring.

Steps to Determine Which Polymarket You're Using

• Check Your Login Method: If you connected a self-custodial wallet (MetaMask, Coinbase Wallet, or similar), you're on the international DeFi platform. If you uploaded government identification and took a selfie, you're on Polymarket US.
• Review Your Settlement Asset: If your positions settle in stablecoins on the Polygon blockchain, you're on the international venue. If you fund and withdraw in US dollars through approved intermediaries, you're on the regulated US exchange.
• Understand Your Custody: If you hold positions as tokens in a wallet you control, you're on the international platform. If your positions are claims within a regulated clearing system, you're on the US exchange.
• Check Your Geographic Access: If you're in the United States and can access the platform, you're likely on Polymarket US. If you're using a virtual private network to access from a restricted jurisdiction, you're on the international platform, which violates its terms of service.

The company published harmonized integrity rules across both platforms in March 2026 and has asked the CFTC for permission to let US users reach the global exchange, meaning the two-track structure may not be permanent. However, as of now, knowing which platform you're using is the first thing any participant should settle, and the interface will not tell you automatically.