If you're looking at the prediction-market category in 2026, you'll quickly run into three names: Polymarket, Kalshi, and Kuest. They get mentioned in the same breath, listed in the same articles, compared in the same operator pitches. That comparison is misleading because the three are not competing for the same shelf. Polymarket and Kalshi are venues — places traders go to take a view. Kuest is a protocol — infrastructure other operators use to run their own venues. Treating them as direct competitors leads to bad strategic decisions on both sides of the table.
This post is the honest, full-stack comparison we wish existed when we were trying to explain the distinction. It covers what each platform actually is, who they're built for, what their fee economics look like, where their regulatory positions sit, and how an operator should think about using them in combination rather than choosing among them.
If you're earlier in your evaluation, the prediction-market primer covers the basics, the market opportunity post covers why this category is worth entering, and the build-vs-license analysis covers the core decision underneath this entire comparison.
The three platforms in one paragraph each
Before going deep, the shortest possible introduction to each:
Polymarket is the largest on-chain prediction-market venue. It runs as a permissionless USDC-settled exchange on Polygon, uses UMA's Optimistic Oracle for resolution, and clears the majority of global event-contract volume in markets outside the regulated US perimeter. Most of its volume is retail; a growing share is professional desks trading from outside the US.
Kalshi is the first CFTC-regulated event-contract exchange in the United States. Markets are operated as binary contracts on a regulated US derivatives venue, with centralised resolution by Kalshi's market-integrity team using pre-published data sources. Kalshi is unavailable to non-US users and is the institutional on-ramp into the category for US-based desks.
Kuest is a protocol layer for prediction-market operators. It provides smart contracts, a matching engine, shared liquidity, and managed resolution rails so any operator — a regional brokerage, a crypto-native exchange, a media company, an institutional desk — can launch their own branded prediction-market venue without building the infrastructure. Kuest is not a venue; it is the layer underneath venues.
The distinction matters because a comparison of "Kuest vs Polymarket" or "Kuest vs Kalshi" is comparing a protocol to a venue, which is the same category mistake as comparing Stripe to a coffee shop.
What Polymarket actually is
Polymarket is a single venue, permissionless and on-chain. Users connect a self-custodial wallet, deposit USDC, and trade event contracts directly with other users through an order book deployed on Polygon. The protocol layer underneath Polymarket is custom — they built and operate their own contracts, their own matching engine, their own liquidity programme, and their own integration with UMA for resolution.
What works extremely well on Polymarket:
- Volume in the markets they host. Polymarket has the deepest on-chain books for political events, macro events, and crypto milestones. If you're a trader who wants to take a view in those categories, Polymarket is currently the best execution.
- Resolution credibility. The UMA-based optimistic oracle has resolved hundreds of thousands of markets with a 99.8%+ clean resolution rate. The dispute path is well-defined and has been battle-tested by adversarial volume. We covered the full mechanics in our resolution deep-dive.
- Permissionless access. Anyone with a wallet and USDC can trade on Polymarket. The platform doesn't gate access by jurisdiction through KYC; it operates outside the regulated US perimeter and relies on geo-blocking for compliance.
What Polymarket is not designed for:
- Hosting other operator brands. Polymarket is a single venue. You cannot run "your brokerage's Polymarket-powered prediction venue" — there is no operator API, no white-label deployment, no per-operator fee model. If you want a branded venue, Polymarket is not your infrastructure layer.
- US institutional flow. US-based traders cannot access Polymarket directly without a VPN, which professional desks won't do. The US institutional opportunity is on Kalshi, not on Polymarket.
- Non-crypto-native users. The Polymarket onboarding requires a wallet, USDC, and comfort with on-chain UX. For a regional retail brokerage's client base, that friction is fatal.
What Kalshi actually is
Kalshi is the regulated US event-contract exchange. It operates as a CFTC-registered Designated Contract Market (DCM), which means every market it hosts has been reviewed against the CFTC's framework for event contracts before going live. Settlement is in USD, custody is through a US-regulated banking partner, and resolution is performed by Kalshi's market-integrity team using pre-published data sources.
What works extremely well on Kalshi:
- US institutional access. Macro funds, hedge funds, and prop desks trade on Kalshi as a regulated venue inside the US perimeter. This is the cleanest institutional on-ramp into the asset class globally, and the volume reflects it — Kalshi's institutional share of volume passed 30% in 2025.
- Regulatory clarity. A trade on Kalshi is a regulated derivative trade with the same legal posture as a Treasury futures trade on CME. For an institutional allocator, this is the difference between "we can size into this" and "compliance won't approve it."
- Specific market types. Kalshi has been particularly strong on rates, CPI, and macro contracts — markets where regulated US desks have the largest natural appetite.
What Kalshi is not designed for:
- Non-US users. Kalshi is geo-restricted to US users. A trader in São Paulo, London, or Singapore cannot access Kalshi at all. This is regulatory, not technical, and is mirrored on the Polymarket side (Polymarket geo-blocks the US).
- Hosting other operator brands. Like Polymarket, Kalshi is a single venue. There is no operator API, no white-label, no per-operator fee model. The XP × Kalshi distribution agreement is a partnership, not a product — it does not generalise to other operators wanting to do the same thing.
- Long-tail markets. Kalshi's regulatory framework requires each market to be approved before launch. That works for a curated catalogue of macro and political markets; it doesn't scale to the 9,800+ markets per week that Polymarket runs across long-tail categories.
What Kuest actually is
Kuest is the protocol layer underneath any operator's prediction- market venue. The way to picture it is: instead of being a venue you trade on, Kuest is the infrastructure other venues run on. A regional brokerage, a media company, an institutional desk, or a creator-led community can deploy their own branded prediction-market venue using Kuest in fifteen minutes — and the venue runs on the same audited contracts, shared liquidity, and managed resolution that the protocol provides to every other operator.
The architecture has four layers and the operator inherits all four:
- Smart contracts. Derived from Polymarket's CLOB architecture, audited by OpenZeppelin, deployed on Polygon mainnet. Operator identity is encoded into the contract instances; operator fees accrue to the operator's settlement address.
- Matching engine. Production relayer architecture providing sub-millisecond ordering, no per-order gas costs for traders, and deterministic settlement.
- Shared liquidity. Order flow on every operator deploy contributes to and draws from a unified order book. New operators see real Day-1 depth from the moment they launch. We covered why this matters in the shared-liquidity post.
- Managed resolution. UMA-based optimistic oracle with explicit market rules, source metadata, and a public dispute process.
What Kuest is for:
- Any operator that wants its own venue without building infrastructure. Brokerages, crypto-native exchanges, media operators, institutional desks, sports books, creator communities — anyone with distribution who doesn't want to spend $3.4M–$7.2M and 8–14 months building infrastructure they don't need to own.
- Multi-jurisdiction deployments. A single operator can deploy per-jurisdiction overlays (access policy, fee setup, language bundles) without running multiple builds.
- Long-tail markets at scale. The protocol layer can host the long tail of markets that a single regulated venue can't approve one at a time.
What Kuest is not:
- A venue. You cannot trade on Kuest directly. The protocol is underneath operator venues; the venues are where traders go.
- A regulated US derivatives exchange. Kalshi is that. Operators who need US-regulated exchange status work with Kalshi's partnership channel, not with Kuest.
Side-by-side: fee economics
The three platforms have structurally different fee models because they're playing different positions in the stack.
| Dimension | Polymarket | Kalshi | Kuest (operator deploys) |
|---|---|---|---|
| Headline trader fee | ≈ 1.0% per side (split protocol/operator) | 0.0% (no per-trade fee) | Operator-set, typically 0.5–1.5% |
| Hidden costs | Spread (~30–60 bps) | Spread + market-data tier | Spread (~20–60 bps on shared book) |
| Maker rebate | No | No | No (shared book design) |
| Operator share | Not applicable (single venue) | Not applicable | 100% of operator fee |
| Protocol take | Polymarket retains its venue margin | Recovered through ecosystem revenue | Small protocol fee underneath operator fee |
| Per-jurisdiction overrides | No | No | Yes |
The most important line is the operator-share row. Polymarket and Kalshi run their own venue and keep their venue margin. Kuest's model is structurally different — the operator running the venue keeps nearly all of the operator fee, with a small protocol fee underneath to cover infrastructure. This is what makes Kuest's model operator-aligned rather than competitive with operators.
For a deeper breakdown of how to set the operator fee on a Kuest deploy, see the fee models post.
Side-by-side: feature matrix
A more granular comparison across the dimensions operators usually care about:
| Feature | Polymarket | Kalshi | Kuest |
|---|---|---|---|
| Settlement asset | USDC on-chain | USD bank custody | USDC on-chain (operator may layer fiat) |
| Resolution model | UMA Optimistic Oracle | Centralised market-integrity team | UMA-based with explicit rules and public dispute process |
| Geographic availability | Global except US | US only | Configurable per operator |
| KYC requirement | None (wallet-only) | Full US-regulated KYC | Operator-defined (wallet-only or external KYC layer) |
| Market creation | Permissionless (admin curation) | Pre-approved by exchange | Operator-managed within protocol limits |
| Custody model | Self-custody | Regulated banking partner | Configurable: self or regulated |
| Order-book depth on launch | Existing (mature venue) | Existing (mature venue) | Shared (Day-1 deep for new operators) |
| Operator branding | Polymarket only | Kalshi only | Per operator deploy |
| Ecosystem fit | On-chain native | Regulated US institutional | Operator-side (any jurisdiction, any audience) |
The deciding columns for most operators are "geographic availability" and "operator branding." If you're an operator with audience outside the US, Polymarket can't host your audience under your brand and Kalshi can't host them at all. Kuest is the path.
Audience fit, in plain language
The cleanest way to think about which platform is right for which audience is to ask "who's the audience and where are they?"
A US-based macro hedge fund wants to take a view on the next Fed decision. They need a regulated US venue. Kalshi is the answer. Kuest is irrelevant for them — they're not running a venue, they're trading on one.
A crypto-native trader anywhere outside the US wants to take a view on a political or macro event. They want depth, low fees, and a permissionless onboarding. Polymarket is the answer. Kuest is irrelevant for them — they're not running a venue.
A regional retail brokerage with 80,000 clients in São Paulo wants to offer prediction markets to their existing client base under their own brand, with local language, local fee structure, and the regulated banking partner their clients already trust. Polymarket can't host them. Kalshi can't host them. Kuest is the answer.
A crypto-native exchange (Kraken, Bitget, etc.) wants to add prediction markets as an SKU within their existing exchange UI. They need an operator API, white-label branding, and integration with their existing user accounts. Kuest is the answer.
A creator-led community (newsletter, Twitch, X) wants to host markets specific to their audience's interests. They need operator-controlled market creation, branded surfaces, and a fee flow they own. Polymarket and Kalshi can't host this; Kuest can.
A US-based sports book wants to run prediction-market overlays for their existing client base. They need US-regulated status and audience-specific market design. The right path is a partnership with Kalshi (regulated US venue) or a custom build under their own DCM application — not Kuest, which is structurally operator-side rather than US-regulated venue-side.
The protocol-vs-venue distinction explained
The cleanest analogy we've found is payments. Visa and Mastercard are payment networks; Stripe is a payment infrastructure layer; the coffee shop is the operator-merchant. None of these compete with each other in any meaningful way. They occupy different positions in the same value chain.
Prediction markets are at the same point in their evolution that payments was in around 2010, when a generation of merchants started realizing they could host payments without building card-processing networks themselves. The merchants that figured this out fastest won their categories. The same thing is happening in prediction markets now.
Polymarket and Kalshi are venues — they own the customer relationship for trades that happen on them, and they capture the venue margin. Kuest is infrastructure — it lets thousands of operator brands own the customer relationship for trades that happen on each of their venues, with the venue margin flowing to the operator and a small protocol fee underneath.
The strategic question for an operator is not "which venue do I trade against?" — that's a trader question. It's "do I want to build infrastructure or run a venue?" If the answer is "run a venue" (which is the case for almost every operator with distribution), then Kuest is the path because Polymarket and Kalshi are not in the operator-infrastructure business.
Use cases that fit each combination
Operators don't have to choose one. The most sophisticated operator strategies in 2026 use combinations.
Combination 1: Kuest deploy + Kalshi institutional partnership. A US-headquartered operator can run a Kuest-powered international deploy for non-US audiences while pursuing a Kalshi distribution arrangement (similar to XP × Kalshi) for US institutional flow. This was the pattern XP themselves followed: they're a Kalshi distribution partner for institutional flow into the US venue, and separately they're evaluating Kuest infrastructure for the Brazilian retail audience that Kalshi can't serve.
Combination 2: Kuest deploy + Polymarket liquidity mirror. A Kuest operator deploy can mirror Polymarket markets where the underlying questions are the same. Order flow on the operator's deploy contributes to and draws from a shared book that includes Polymarket-aligned depth. The operator gets Polymarket-grade liquidity under their own brand, in their own jurisdiction.
Combination 3: Kuest deploy + custom market creation. A media operator with a niche audience can run mostly long-tail markets specific to their niche, with the option to also host mainstream mirrored markets. The mainstream markets get shared liquidity; the long-tail markets bootstrap from the operator's audience.
The operators who'll define this category over the next 24 months are not operators who choose one platform; they're operators who combine platforms to fit their audience and their position.
What we expect to change in the next 12 months
The category is moving fast enough that any honest comparison has a 12-month half-life. Three shifts are visible from where we sit, and they should factor into a long-horizon decision.
Polymarket is moving up-market into institutional access. The 2025 fundraise put Polymarket on a path toward more sophisticated institutional onboarding — block-trade rails, OTC desks, and reporting infrastructure that meets the needs of professional allocators in jurisdictions that already permit on-chain participation. The expectation is that within a year, the gap between trading on Polymarket and trading on a regulated US venue will narrow meaningfully for non-US institutional flow.
Kalshi is moving down-market into retail and into long-tail contracts. The recent additions of sports-event contracts and the partnership track exemplified by XP suggest Kalshi will expand both the breadth of contracts and the breadth of access. Expect Kalshi-powered retail experiences in more US distribution channels, and expect the catalogue of approved contracts to widen faster than it has historically.
The Kuest protocol layer is densifying. As more operators deploy on the same shared liquidity, the depth of the unified book grows multiplicatively. We expect the Day-1 spreads on a Kuest operator deploy to tighten by another 30–40% over the next year as more operator brands contribute order flow to the shared book. That widens the gap between the trader-execution quality on a Kuest-powered venue and the alternatives.
The operator strategy that ages best across all three of these shifts is the one that owns audience and inherits infrastructure. Polymarket and Kalshi are evolving as venues; Kuest is evolving as a protocol; the operators that compound across the changes are the ones whose own brand sits in front of an evolving stack they're not personally maintaining.
How to think about the decision
A short framework for getting to the right answer:
- Are you a trader? Use Polymarket if you're outside the US, Kalshi if you're inside the US. Kuest is not your platform — you trade on operator venues built on Kuest.
- Are you a US-headquartered institution wanting regulated exposure? Kalshi, possibly with a Kuest deploy for non-US audiences alongside.
- Are you any other operator with distribution? Brokerage, crypto-native exchange, media, creator, sports book, fintech. Kuest, almost certainly.
- Are you trying to be the next Polymarket or Kalshi? Build your own venue infrastructure. The protocol path won't help you; you need to own every layer because your moat is the venue itself.
For the overwhelming majority of operators we work with, the answer is option 3: they have distribution, they don't want to be a venue-owning competitor of Polymarket and Kalshi, and they want infrastructure that lets them serve their audience under their own brand. That's the protocol-layer thesis, and it's the position Kuest occupies.