Compare prediction market platforms, side by side

A comparison is only useful if it weighs the things that actually decide your experience: who regulates the venue, how you fund and withdraw, what the fees really cost, and whether it is open to you where you live.

What a fair comparison weighs

It is easy to compare platforms on the wrong things. A long market list or a slick app feels important, but neither tells you what a trade will cost or whether your money is safe and reachable. The comparisons on this site are built around four axes that decide the real experience, and we keep them in the same order on every page so you can read across without being steered.

The first axis, regulation and standing, asks who oversees the venue and how your money is held. A platform registered with the Commodity Futures Trading Commission as a designated contract market operates under federal oversight, with contract terms filed in advance. A decentralized protocol settled by an oracle is a very different proposition, governed by code and token holders rather than a regulator. Neither is automatically better for you, but they carry different risks, and an honest comparison names which kind of venue each one is.

The second axis, funding and withdrawal, is the one readers underrate most. How you put money in, how long it takes to get it out, and whether there are holding periods or caps all shape the real experience. A venue with low fees but a slow or restricted withdrawal can be worse in practice than one that costs slightly more to trade. The third axis, fees and the spread, is the one readers overrate and misread, which is why we built a dedicated dataset for it. The fourth axis, availability, is the gate. We never point a reader toward a platform they cannot legally use, so on every comparison the availability question comes before any suggestion to act.

Fees take different shapes

The single most confusing axis is fees, because platforms do not charge in the same way and a headline number rarely tells the whole story. Some charge a small amount per contract that depends on the price. Some charge nothing to trade but pass on network or conversion costs. Some take a percentage of your profit when you cash out. Comparing a per contract fee against a percentage of profit by eye is close to meaningless, which is why our cross platform dataset converts them onto comparable ground.

A price scaled fee, the shape Kalshi uses, is largest on a 50 cent contract and shrinks toward the penny ends, so a confident trade near 5 cents or 95 cents costs very little. A flat per contract fee costs the same regardless of price. A percentage of profit fee, such as the one PredictIt applies, costs nothing on a losing trade but takes a slice of every win, which can add up for an active trader. The point of comparing is not to crown the cheapest in the abstract, but to see which shape suits how you actually trade.

A cross platform fee snapshot

The table below puts the fee and funding basics of several major venues next to each other, each figure dated and sourced. It is a snapshot of the headline structure, not the full picture. For trading fees, spreads, and withdrawal terms across all 16 platforms, see the flagship dataset at prediction market fees compared, which we refresh on a weekly cycle.

Method: compiled from each platform's published fee schedule and terms. Sources and dates: Kalshi fee schedule effective February 2026; Polymarket documentation, June 2026; Robinhood support pages, June 2026; ForecastEx LLC rulebook dated February 2026; PredictIt fee terms, June 2026; Limitless fee documentation, June 2026. PredictIt operates under contested regulatory standing, and Limitless restricts access in some regions. Fees and availability change often. Confirm the current terms on each platform before trading.

Two models, not one market

The deepest difference between platforms is not their fees or their app, it is what kind of thing they are. Most venues fall into one of two models, and reading a comparison is far easier once you can tell them apart. The first model is the regulated exchange. Kalshi and ForecastEx are registered with the Commodity Futures Trading Commission as designated contract markets, which means a federal regulator oversees them, contract terms are filed in advance, and the venue operates within a defined rulebook. Robinhood sits adjacent to this model, offering brokerage access to event contracts that trade on a regulated exchange rather than running its own.

The second model is the decentralized protocol. Polymarket and Limitless settle on a blockchain, with outcomes confirmed by an oracle and funds held in stablecoins rather than a brokerage account. There is no central regulator in the same sense, and the rules are enforced by code and, when a result is disputed, by token holders. This model can offer a wider range of markets and global reach, but it places more of the responsibility on you to understand custody, network costs, and how disputes resolve. Our guide on how regulated exchanges differ from offshore venues goes deeper on the distinction.

Neither model is automatically safer or better. A regulated exchange offers oversight and clear recourse, but a narrower set of markets and stricter eligibility. A decentralized protocol offers breadth and openness, but asks you to trust a different set of mechanisms and to manage your own keys and conversions. The point of comparing is to match the model to what you value, which is why every head to head page on this site names the model first and weighs the trade offs honestly rather than pretending the two are interchangeable.

Funding and withdrawal, the axis readers underrate

Ask most people what separates two platforms and they will mention fees or market choice. Far fewer mention how money actually moves, yet this is often what shapes the day to day experience most. A venue can advertise low trading costs and still be frustrating if deposits are slow, withdrawals carry a holding period, or there is a cap on how much you can put behind a single position. The cost of a trade is paid once. The friction of getting your money in and out is paid every time.

The models differ sharply here too. On a regulated exchange you typically fund in dollars from a bank or card and withdraw back to the same place, with timing set by banking rails and the venue's own checks. On a decentralized protocol you fund with a stablecoin on a blockchain, which means you are responsible for holding the asset, paying network costs, and sometimes converting in and out of dollars yourself. PredictIt adds its own wrinkle, with a holding period after a deposit before you can withdraw and a fee on the way out. None of these is a flaw in itself, but each changes how quickly and cheaply you can actually use your money, which is exactly the kind of thing a comparison should surface. Our guide to funding and withdrawing safely covers the practical checks.

Verification matters here as well. Regulated venues run identity checks before you can fund or trade, which protects the system but adds a step and can exclude some users. Decentralized venues may ask less at the door but place more of the custody risk on you. When you compare, look past the headline and ask the plain questions: how do I get money in, how long until I can take it out, what does the exit cost, and what happens if I need it quickly. The answers often matter more than a fraction of a cent in trading fees.

What a comparison cannot tell you

An honest comparison is clear about its limits. It can line up the structure of two venues, the kind of regulation, the funding path, the fee shape, and the availability picture, all dated and sourced. What it cannot do is predict an outcome, promise you a profit, or tell you that one platform is right for everyone. A price on any of these venues is an implied probability, not a forecast you can bank, and the exchange itself takes no position for or against you. Comparing platforms helps you choose where to trade, not whether you will win.

A comparison also ages. Fees are changed, regions are opened or closed, and a venue's regulatory standing can shift after a single action. We date every figure and review these pages on a cycle precisely because the ground moves, but the only fully current source is the platform itself on the day you act. Read the comparison to understand the shape of the choice, then confirm the live detail before you commit. And remember that the right comparison for you depends on your own situation, which no page can know in full.

Finally, a comparison is not a recommendation to trade at all. Plenty of readers arrive curious about how these markets work and leave having decided that none of them suits them, which is a perfectly good outcome. We rate and explain so that you can make an informed choice, including the choice to walk away. If you do decide to participate, do it with money you can afford to lose and with the rules in front of you, not from a headline.

How to read a head to head page

Each comparison on this site follows the same spine, so once you have read one you can read any of them quickly. We state what kind of venue each one is, then walk the four axes in order, then give a balanced verdict that names what each platform suits rather than declaring a single winner. A venue that is excellent for a confident political trader can be a poor fit for someone who wants instant withdrawals, and a fair comparison says so plainly instead of pretending one size fits all.

The verdict is deliberately even handed. We do not rate a platform higher because it pays a referral, and no platform pays for its place or its score. Where a comparison does suggest opening an account, that suggestion appears only after the information and only for a platform that is genuinely legal and available to the reader in question. If neither venue in a pairing is available where you are, the honest answer is that the comparison is academic for you, and we would rather say that than send you somewhere you cannot go.

Two starting points are worth more than the rest because they anchor the whole set. The most asked pairing is Kalshi versus Polymarket, which sets a regulated US exchange against a decentralized global protocol and shows the two main models in one view. From there you can branch to any platform hub on the platforms page, confirm your own situation on the legality page, or learn the underlying mechanics in our guides on how prediction markets work and fees and how they affect returns.

Availability comes before everything

It is worth repeating, because it is the rule that overrides the others. A platform you cannot legally use is not a cheaper or a pricier option, it is not an option at all. Regulation, funding, and fees only start to matter once a venue is genuinely open to you, so the practical order of a comparison is to settle availability first and then weigh the rest. This is why every comparison links to the legality page for the places involved, and why no part of this site points a reader toward a venue they cannot lawfully access.

Availability also shifts. A platform open to you today might restrict your region tomorrow, or a contested venue might change how it operates after a regulatory action. That is why the dates on these pages matter as much as the figures. When you read a comparison, check the last reviewed date, then confirm the current position on the platform itself and on the legality page before you act. Treat the comparison as the starting map, not the final word.

The pairings readers ask about most

Some comparisons are searched far more than others, usually because they pit the two main models against each other or set a familiar name beside a newer one. A handful are worth flagging as good entry points. Kalshi versus Polymarket is the anchor of the whole set, a regulated US exchange beside a decentralized global protocol. Kalshi versus Robinhood matters because Robinhood offers brokerage access to contracts that trade on a regulated exchange, so the two are closer than they first appear and the difference is mostly the wrapper and the fees.

For readers drawn to the decentralized side, Polymarket versus Limitless sets the largest on chain venue against a newer one and shows how two protocols can still differ on funding network, fee shape, and regional access. And Kalshi versus PredictIt is useful for the politics minded reader, because it contrasts a broad regulated exchange with a research focused venue whose standing has been contested and whose fees work very differently. Whichever you start with, read it the same way: model first, then the four axes, then a verdict that names who each venue suits. The full list of head to head pages sits at the foot of this page.