Moon.com vs Polymarket vs Kalshi: Three Different Products

Search for Moon.com and you will often find it filed alongside Polymarket and Kalshi. Worth knowing before you compare them: Moon.com has no sports markets and no politics markets, and it is not a prediction market. The three platforms share a surface resemblance — you put money on something and find out later whether you were right — and very little underneath it.

This page sets out the actual structural difference and compares all three side by side. If you came here to decide which to use, the short version is that the question is malformed: they are not substitutes for one another.

What a prediction market actually is#

Polymarket and Kalshi are prediction markets. The unit you trade is a contract on a defined future event — a candidate winning an election, a team winning a match, an inflation print coming in above a threshold. The contract has exactly two possible end states: the event happened, or it did not. At settlement it is worth its full face value or nothing.

Because of that binary payoff, the trading price in between is read as an implied probability. A contract changing hands at 62 cents on the dollar is the market saying roughly a 62 percent chance. You buy from and sell to other participants in an order book; the venue matches you rather than taking the other side. The contracts are bought outright rather than on margin, and your maximum loss is what you paid — though “no leverage in prediction markets” is no longer an absolute: the CFTC approved KalshiEX’s BTCPERP, a perpetual contract on the Bitcoin spot price, on 29 May 2026. You are also not locked in until the event resolves. Kalshi states plainly that you are not required to hold a position to settlement — you can sell back into the order book at any time.

What Moon.com actually is#

Moon.com is a leveraged directional bet on a live price. You pick a market, pick Up or Down, set a stake, and set leverage anywhere from 1× to 1000×. There is no event, no yes/no contract and no settlement date. The bet tracks the continuous price of the underlying asset and you close it whenever you want — a second later or a week later. If the price moves far enough against you, the position auto-liquidates at a bust price that is shown to you before you confirm the bet. That mechanism is worth understanding properly before you use it, and we cover it in how 1000× leverage works.

The counterparty is not another user. Moon’s own terms of service describe the operator as “the House” — the counterparty to every bet, with a disclosed financial interest in the outcome. There is no order book to trade against. Pricing comes from external data feeds (DXFeed, Pyth Network and the SEDA oracle for out-of-hours coverage), and the settlement price includes a spread in Moon’s favour under section 9.2 of its terms, on top of the published fees. That is a different business model from a matching venue: “Moon vs Polymarket” compares a house-model product with a peer-to-peer exchange.

Side by side#

Regulation: three separate categories, not three tiers#

This is where the “which is better” framing breaks down completely. Kalshi operates as a CFTC-regulated exchange in the United States — a federally supervised derivatives venue with the oversight and reporting obligations that come with it. Polymarket sits in a more complicated position: on 5 September 2025 Germany’s gambling regulator, the GGL, issued a public warning about it and it sits on the German blacklist — but that was a warning, not a formal decision or a court ruling, and calling Polymarket unregulated is no longer accurate either, since it re-entered the US market by acquiring QCEX, a CFTC-licensed exchange. Moon.com is a third thing again — a gaming operator licensed by the Offshore Finance Authority of the State of Anjouan.

Moon International Limited holds Anjouan licence ALSI-202601063-FI2, issued on 31 January 2026 and valid until 30 January 2027, and it verifies as valid in the Anjouan register. We go through the licence, the register check and the terms in detail in our full legitimacy review.

Availability#

Availability differs by country. Moon’s terms set access on two separate grounds under section 3.2: comprehensively sanctioned countries, and any country that requires a local licence Moon does not hold. The effective list is therefore larger than the 44 jurisdictions named on the site, and creating an account requires that you reside in a supported country. The full jurisdiction breakdown is in our blocked countries guide.

How Moon’s model differs in practice#

Being right about the category difference does not make Moon the better product. Its model works differently from an order-book venue in ways that are worth understanding before you use it.

• ▸The house spread. Moon quotes the settlement price, and its terms disclose that the price contains a spread in Moon’s favour, on top of every listed fee. On an order-book venue, the price is whatever other participants agree on. That is the structural difference between a house model and a matching venue.
• ▸Fee information sits in two places. The holding fee is charged for every 8 hours a position stays open, at a rate Moon calls dynamic, assessed on your wager and leverage, and the applicable rate is displayed inside the platform and folded into your position costs, while the public fee overview sets out the headline structure.
• ▸A short operating history. Moon.com has only been publicly accessible since August 2026, previously in invite-only beta, so there is far less of a public record than for a venue that has been running for years.
• ▸The displayed profit and loss is an estimate. It projects an estimated closing price including the liquidity adjustment, the performance fee and accrued holding fees — the house edge sits inside the price itself rather than being listed as a separate line.
• ▸Ownership is not publicly stated. Casino.org describes Moon as a Stake-affiliated brand; Moon does not state it anywhere on its own site. The verified operator of record is Moon International Limited.

Moon’s counter-argument is the fee geometry: the 1 percent opening fee is charged on your stake rather than on the leveraged exposure, which is what makes very high leverage economically possible at all. The full arithmetic, including the performance fee and the rakeback that offsets part of it, is in our fee breakdown.

Risk: this is not a hedging instrument#

Prediction markets are frequently defended as information tools — a way to aggregate opinion into a probability. Whatever you make of that argument, it does not transfer to Moon. Moon.com is high-risk entertainment. At high leverage a fraction of a percent of adverse movement wipes out the stake, and with a house spread inside every settlement plus three fees on top, the average bet is negative-expectation by construction. The design is honest about part of this: your loss is capped at your stake, the bust price is shown before you confirm, and there is no margin call or negative balance. That caps the size of a loss; it does not change how likely one is.

The platform is 18+, funded with BTC, ETH, SOL, USDT, USDC and many other cryptocurrencies — crypto can be bought directly by card through the third-party provider swapped.com — and it has a play-money mode with the full feature set. If you want to understand the mechanics, that mode costs nothing and is the sensible place to find out what your actual fee drag and hit rate look like. On verification, Moon's help centre reserves a KYC step before the first deposit — our own funded test in August 2026 was never asked for it, so treat the check as one that can be switched on at any time. Never stake money you need for something else.

So which one should you use?#

• ▸You want to trade the probability of an event — an election, a match, a data release: Polymarket or Kalshi. Moon does not offer this at all, at any price.
• ▸You are in the United States and want regulatory cover: Kalshi is the CFTC-registered option.
• ▸You want a directional bet on a price with leverage and the freedom to close whenever: that is Moon’s product, and event contracts do not do it.
• ▸You want low-cost, long-horizon exposure to an asset: none of the three. A spot exchange or broker is the right tool.
• ▸You are comparing Moon to something similar: the real comparison set is Rollbit and other leveraged up/down products, not event markets.

Moon’s actual point of difference within its own category is that it is a standalone leverage-betting product on a premium domain rather than a tab inside a casino. Whether that is worth anything to you is a preference question. Whether it is a Polymarket competitor is not — it is a different product.