Tracked bookmakers · prediction market

Gemini Exchange review: who runs it, and are the odds any good?

Prediction market. Prices on Gemini Exchange are set by traders on an order book, not by a bookmaker. The figure below is the typical two-sided spread across its markets — measured exactly as we measure a bookmaker's margin, but it means something different: nobody set it as a fee, and Gemini Exchange's own charges (where it has any) are billed separately rather than built into the price. It is reported here, and deliberately not ranked against sportsbooks.

Across 119 markets observed in the last 7 days (1 sports, 1 leagues), Gemini Exchange's median spread was 4.44%. Where at least five books priced the same market, Gemini Exchange had the single best price 0.4% of the time.

How Gemini Exchange's prices compare

Price only — fees not verified. The figure above is what Gemini Exchange's prices imply, before any commission or fee it charges. Omenizer has not verified Gemini Exchange's fee schedule, so it cannot be compared like-for-like with a venue whose costs we know, and it is left out of our cost comparison for the same reason. A low price with unknown fees is not the same as a low total cost.

Gemini Exchange spread by sport

Only sports with 50+ observed Gemini Exchange markets in the last 7 days are shown — a median over less is noise.

Who runs Gemini Exchange

Availability: licensed in AU, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US, US. (reported — verification in progress)

On an order book, the spread is what it costs to cross it: the gap between the best price to buy and the best price to sell. A 4.44% spread means the two sides of a typical Gemini Exchange market together imply about 104.44% — the cost of trading in and straight back out. It is set by whoever is quoting at that moment, not by Gemini Exchange, and it moves with liquidity.

FAQ

Is Gemini Exchange legit?

Omenizer has not yet verified which company operates Gemini Exchange or what licence it holds — a gap in our research rather than a finding against the book. Independently of that, Omenizer has measured 119 Gemini Exchange markets in the last 7 days against the rest of the market, so its prices are observable rather than taken on trust. We publish the checks we can evidence and flag the ones we cannot — we do not certify bookmakers.

Who owns Gemini Exchange?

Omenizer has not yet verified the company behind Gemini Exchange. We record an operator only when we have read it on the operator's own site or a regulator's register, so this is an unfilled gap rather than a guess we declined to make.

Is Gemini Exchange licensed?

Not established — we have not confirmed a licence for Gemini Exchange.

What is Gemini Exchange's typical spread?

Measured across 119 markets in the last 7 days, Gemini Exchange's median two-sided spread was 4.44%. Lower is better for bettors.

How often does Gemini Exchange have the best odds?

Where at least five tracked books priced the same market, Gemini Exchange posted the single best price 0.4% of the time over the last 7 days.

How is Gemini Exchange's spread measured?

Omenizer records every price on every tracked market, converts them to implied probabilities, and sums each market's sides; the amount over 100% is the bookmaker's margin. The figure here is the median across all of the book's observed markets — measured, not quoted from marketing material.

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