Manifold Markets review

Manifold’s main markets are denominated in mana, which is play money. The site states plainly that mana “cannot be converted to cash” and that every user starts with M1000 for free. Signing in is a Google or Apple account and takes under a minute; verifying a phone number is an optional bonus quest rather than a requirement.

That single fact governs everything else on this page. A price difference between a Manifold market and a real-money venue is not an arbitrage, because no trade converts mana into dollars. Our comparison pages report such differences and never present them as an opportunity.

Pricing comes from an automated market maker rather than an order book, so a binary market publishes one probability and the NO side is its complement. The two sum to exactly one, which means the spread is zero — honest, but not the same as costless. The real cost is slippage: moving the price is what you pay, and it grows with the size of your position against the depth of the pool.

It is the best place in this category to learn how the instrument behaves, precisely because being wrong costs nothing. The mechanics of buying a probability, watching it move against you and settling are identical to the real-money venues; only the consequence differs.

It is also the widest market set, because anyone can create a market. That is its strength and its weakness in the same breath: the questions cover far more ground than any regulated exchange lists, and the resolution criteria are whatever one user typed into a description box.

That last point is not a small caveat. On a regulated venue the settlement rules are drafted to be enforceable; here they are drafted by the person who asked the question, and they are resolved by that same person. It is why we fetch each Manifold market individually rather than from the list endpoint — the list omits the description, and a market whose criteria nobody has read cannot take part in a published comparison.

Manifold also runs a Prize Drawing, and prizes there are paid in USDC. Its Official Rules, last updated 3 February 2026, state that Prize Drawings are “VOID” in Delaware, Idaho, Massachusetts, Michigan, Nevada, New York, Washington and Washington, D.C., and that residents of those territories “are not eligible to enter or win”.

So the venue is not purely play-money, and the boundary matters when reading anything about it — including this page. Play-money trading itself is not restricted in those jurisdictions by any Manifold document we could read; it is the prize mechanism that is. Whether claiming a prize requires identity verification is not stated anywhere we found, which is why our KYC field for this venue is empty rather than set to “no”.

A Manifold market reports itself resolved only once its creator settles it, and on a venue where questions are settled by the people who asked them that can lag the close by weeks, or never happen. A market that stopped trading in February can still describe itself as open.

Our board therefore judges a market on its close time as well as its own flag, which is how two settled contracts stopped appearing as live. If you trade here, apply the same test: check when it closes, not only whether it says it is open.