Moon.com vs Polymarket vs Kalshi: Three Different Products

Search for Moon.com and you will find it filed alongside Polymarket and Kalshi on more than one large comparison site, sometimes with a paragraph about its sports and politics markets. That paragraph is wrong. Moon.com has no sports markets and no politics markets, and it is not a prediction market at all. The three platforms share a vague surface resemblance — you put money on something and find out later whether you were right — and almost nothing underneath it.

This page sets out the actual structural difference, compares all three side by side, and is honest about where each one is weak. 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. There is no leverage in the product itself, and your maximum loss is what you paid for the contract. Your position resolves when the real-world event resolves, and not before.

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, and it is not hidden — but it does mean “Moon vs Polymarket” compares a bookmaker-style 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 contested position: in September 2025 Germany’s gambling regulator, the GGL, classified it as illegal gambling. Moon.com is a third thing again — a gaming operator licensed by the Anjouan Gaming Board.

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. The full jurisdiction breakdown is in our blocked countries guide.

Where Moon.com is genuinely weaker

Being right about the category difference does not make Moon the better product. It has real disadvantages that a prediction market does not share, and some of them are structural rather than fixable.

• ▸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. You cannot audit Moon’s spread from outside.
• ▸The holding fee is unpublished. It is charged every 8 hours a position stays open and moves with volatility, liquidity and funding — but no fixed rate is published, so you cannot calculate carrying cost in advance. Our fee breakdown covers what is and is not disclosed.
• ▸Almost no track record. Moon.com launched publicly on 17 August 2026. There are no independent user reports, no complaint history and no confirmed payout experiences — not a bad record, but no record at all. Judge it accordingly.
• ▸No independent audit. We found no third-party audit and no provably-fair mechanism. Moon states that it does not create or manipulate asset prices; that is the operator’s own statement, not a verified finding.
• ▸Adverse terms on failure. A bust caused by a faulty price or a platform error stays final under section 7.3(b), settlement can occur at a worse price than last displayed, and liability is capped at the greater of three months of fees or USD 100.
• ▸Ownership is unclear. Industry reports from several gambling publications describe Moon as a Stake-affiliated brand; this is officially unconfirmed and Moon does not state it. Treat it as an open question, not a fact.

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 $100,000 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. 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 prediction markets 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, BC.Game Futures, Metawin and DuelBet — 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 simply is not one.