What Are Prediction Markets?
A prediction market lets people buy and sell shares tied to the outcome of a real-world event, an election, a sports result, a Fed rate decision, or even where a specific cryptocurrency’s price will land by a certain date. Each share is priced between $0 and $1, and that price reflects the market’s collective estimate of how likely the outcome is. If the event happens, shares that predicted it resolve to $1; if it doesn’t, they resolve to $0.
Unlike a traditional bet against a bookmaker, prediction market prices move continuously as new information arrives and traders buy or sell, similar to how a stock price moves. This has made prediction markets attractive not just to traders looking for profit, but to journalists, analysts, and even policymakers who use market prices as a real-time gauge of public expectation, sometimes described as a “wisdom of the crowd” indicator.
The sector has grown rapidly: on-chain prediction market volume reached an estimated $36 billion in the first quarter of 2026 alone, according to blockchain analytics firm TRM Labs, a figure that reportedly surpassed on-chain casino gambling volume for the first time. Two platforms dominate the space, Polymarket and Kalshi, and they take very different approaches to how they operate.
How Prediction Markets Differ From Casino Betting
The biggest structural difference is where the odds come from. At a casino or sportsbook, the operator sets the odds and builds in a house edge, meaning the math is designed to favor the house over time regardless of the outcome. On a prediction market, prices are set entirely by other traders buying and selling shares, closer to how an exchange like Betfair or a stock market works than to how a slot machine or roulette wheel works.
This also changes what “winning” looks like. A casino game’s outcome is generated by a random number generator, verified through licensing and, on some crypto casino Originals, through provably fair cryptographic proof. A prediction market’s outcome is a real, independently verifiable event, an election result, a game score, an economic data release, resolved by an official source rather than generated by the platform itself.
Fees also work differently. Rather than a built-in house edge on every wager, prediction market platforms typically charge trading fees on top of a market price that reflects genuine supply and demand between traders, which can mean better long-run value for a skilled trader than a fixed-house-edge casino game, though it also means no guaranteed payout structure the way a slot’s RTP provides.
Polymarket vs Kalshi Compared
| Feature | Polymarket | Kalshi |
|---|---|---|
| Regulatory status | Crypto-native; gained a US regulated path via its 2025 acquisition of QCX/QC Clearing | CFTC-regulated designated contract market |
| Access | Global | US-only |
| Funding | Crypto-first (USDC on Polygon); fiat on-ramps via card/MoonPay available | Fiat (bank transfer, debit card); some crypto options |
| Identity verification | Minimal for many markets | Required (KYC, linked US bank/SSN) |
| Market variety | Broader – crypto, geopolitics, culture, global sports and niche events | Narrower but expanding – finance, weather, politics, and growing sports coverage |
| Reported May 2026 volume | ~$7.08 billion (down from a March peak) | ~$17.91 billion (ninth consecutive monthly record) |
The practical difference for a user is straightforward: Kalshi feels closer to a regulated sportsbook or brokerage, dollar funding, KYC, and a federally supervised legal status, while Polymarket feels closer to a crypto-native exchange, wallet-based funding, broader global market access, and fewer identity requirements. Both have faced regulatory friction: Kalshi was temporarily banned in Nevada and challenged in Arizona over sports-related contracts, while Polymarket received a cease-and-desist from Tennessee and settled with the CFTC for $1.4 million over unregistered binary options offered to US persons before its regulatory restructuring.
Are Prediction Markets Gambling?
This is a genuinely unresolved legal question, and it’s the central tension driving most of the regulatory activity around both platforms. Federally, Kalshi operates as a designated contract market under the Commodity Exchange Act, the same legal category as traditional derivatives and futures exchanges, and it has won federal court rulings affirming its right to list certain election-related contracts nationwide.
At the state level, several gambling regulators disagree, at least when it comes to sports-outcome contracts specifically. Nevada and Arizona have both taken action against Kalshi, arguing that betting on a game’s outcome is functionally sports betting regardless of the legal label attached to the product, which would place it under state gambling law rather than federal commodities law. Polymarket has faced a similar version of this fight, including a cease-and-desist from Tennessee.
For everyday users, the practical takeaway is that prediction markets sit in a genuine legal gray zone that varies by state and by market type, particularly for sports contracts. Neither platform markets itself as a casino, and neither offers the kind of provably fair game mechanics discussed elsewhere on this site, but the “is this gambling” debate is very much live and worth being aware of before treating either platform as fully equivalent to a regulated exchange or a regulated sportsbook.
Prediction Markets and Crypto Casinos
The line between prediction markets and crypto casinos has started to blur in 2026. In May, Roobet became the first major crypto casino to add prediction markets alongside its existing casino and sportsbook offering, letting players trade on real-world event outcomes from the same account and crypto balance they use for slots and Originals.
The overlap makes sense given the shared audience and infrastructure. Crypto casino players are already comfortable funding accounts with cryptocurrency and, in many cases, using platforms with lighter identity requirements, exactly the profile that Polymarket’s crypto-native model also targets. It’s reasonable to expect more crossover between the two categories as prediction market volume continues to grow.
That said, prediction markets and casino games remain fundamentally different products. A casino’s RTP and volatility are published, tested, and in some cases provably fair verifiable per round. A prediction market has no RTP at all, your outcome depends entirely on whether your view of a real-world event turns out to be right, and on the price you paid relative to other traders, not on a fixed house edge.
FAQ – Prediction Markets
A prediction market lets users buy and sell shares tied to the outcome of a real-world event, with share prices between $0 and $1 reflecting the market’s collective estimate of that outcome’s likelihood.
Polymarket is a crypto-native platform with global access and minimal identity requirements for many markets, while Kalshi is a CFTC-regulated exchange available only to US users, funded in dollars, and requiring identity verification.
Kalshi operates as a federally regulated designated contract market, but several states, including Nevada and Arizona, have challenged whether sports-related contracts specifically should instead be classified as gambling under state law. The legal picture varies by state and market type.
Polymarket historically operated outside US regulatory oversight for many markets, but gained a regulated US path in 2025 through its acquisition of QCX and QC Clearing. It also settled with the CFTC for $1.4 million over past unregistered binary options offered to US persons.
Prices are set by supply and demand between traders, similar to a stock market, rather than by a house-set fixed odds line. A share priced at $0.65 implies the market currently estimates roughly a 65% chance of that outcome occurring.
Yes. In May 2026, Roobet became the first major crypto casino to add prediction markets alongside its casino and sportsbook, letting players trade on real-world events using the same account and crypto balance.
They’re related but not identical. Sports betting uses house-set fixed odds, while prediction markets use trader-driven pricing with no built-in house edge on the outcome itself, though this overlap is exactly what’s driving state-level gambling regulators to scrutinize sports-related prediction contracts specifically.
Max Ledger
Casino and gaming expert
Max Ledger is a crypto and online casino specialist who has personally reviewed 20+ crypto casinos on this site, covering blockchain gambling platforms, bonus structures, and provably fair gaming.