Venues / Polymarket

Is Polymarket legit?

The checklist

Custody: who holds your money

International docs say Polymarket is non-custodial, with positions held as ERC-1155 tokens on Polygon and pUSD as collateral; Magic Link and proxy-wallet users have a recovery path. Polymarket US is a fiat platform that holds funds in a dedicated customer account separate from operating funds and requires KYC including SSN.

Who backs Polymarket

• Founders Fund (lead), with Ribbit, Valor, Point72 Ventures, SV Angel, Coinbase and Dragonfly — $150,000,000 (2025) source
• Blockchain Capital (lead) — $55,000,000 (2024) source
• Intercontinental Exchange (NYSE parent), up to $2B at about $9B post-money — $2,000,000,000 (2025-10) source

Incidents

• 2022-01-03: CFTC order and $1.4M penalty. The CFTC ordered Blockratize, Inc. d/b/a Polymarket to pay a $1.4M civil penalty for offering off-exchange event-based binary options without registration. It also required Polymarket to wind down non-compliant markets and to cease and desist. source
• 2024-11-13: FBI raid on founder's home; French gaming regulator action. The FBI searched CEO Shayne Coplan's home amid a Justice Department inquiry into whether Polymarket let US users trade. The CFTC and DOJ ended their investigations in July 2025. In November 2024 France's gaming authority also said the site likely broke French law, and Polymarket geo-blocked France. source
• 2026-01: Nevada Gaming Control Board sues Polymarket US. Nevada regulators sued in Carson City state court over unlicensed wagering. A temporary restraining order followed in late January, and on 2026-05-29 the court granted a preliminary injunction against QCX LLC, which operates Polymarket US. source
• 2026-07-03: Traders sue over Strategy bitcoin market resolution. Two traders sued in New York state court after a market on whether Strategy would sell bitcoin by May 31 resolved No by UMA token vote, because the sale was disclosed after the deadline. The suit alleges breach of contract and deceptive practices; these are allegations, not findings. source

Real downsides

• Taker fees peak at 2% to 3.5% of trade value at 50c prices, depending on category.
• The international site is close-only in the UK, France, Germany, Italy and several other countries, and blocks US trading.
• The CFTC fined Polymarket $1.4M in January 2022 for offering unregistered event contracts.
• A Nevada court enjoined Polymarket US in May 2026, and international referral rewards stop after 30 days per referee.

Can you use it where you live?

polymarket.com blocks trading from the United States and redirects US users to Polymarket US, a CFTC-regulated DCM/DCO operated by QCX LLC. State-by-state availability of Polymarket US was not found in its docs. On the international site the UK is close-only (no new positions). In the EU, France, Germany, Italy, Belgium, Poland and Slovakia are close-only on frontend and API, and Ireland and the Netherlands are close-only on the frontend. Australia, Singapore, Taiwan, Thailand, Brazil and four Canadian provinces are also close-only. OFAC-sanctioned regions are fully blocked. Nevada's state court enjoined Polymarket US in 2026, and Polymarket US's docs do not publish a state-by-state list. (source)

We report what the venue's own terms say. Don't use a VPN to get around restrictions; venues can freeze accounts that do.

How to use Polymarket without getting scammed

• Only open polymarket.com — fake lookalike sites and "support" DMs are the most common way people lose funds on any trading venue.
• Never share a seed phrase or private key. No real support agent will ask for one.
• A referral code only changes your fee and who gets a share of it. It never needs your keys.
• Treat every new memecoin as able to go to zero. A legit venue does not make the coins on it safe.

Comparing options? See the full Polymarket sheet or Kalshi.