Purrdict vs Polymarket vs Kalshi: Complete Prediction Market Comparison (2026)

Three platforms, three approaches to prediction markets

Purrdict, Polymarket, and Kalshi are the three most prominent prediction market platforms in 2026, and each takes a fundamentally different approach to the same problem: letting people trade on the outcomes of real-world events.

Purrdict is built on Hyperliquid’s HIP-4 protocol, with fully on-chain order matching and settlement. Shared margin with perps and spot. Sub-second finality.

Polymarket is the volume leader, running an off-chain orderbook with on-chain settlement on Polygon. It became a household name during the 2024 US presidential election.

Kalshi is the CFTC-regulated option. A centralized exchange with USD deposits, KYC requirements, and legal clarity for US-based traders.

This comparison covers every dimension that matters for choosing between them.

Full comparison table

Fees: a detailed breakdown

Fees are the single biggest differentiator for active traders, and the gap between these platforms is significant.

Purrdict runs on Hyperliquid’s HIP-4 protocol with on-chain settlement and shared margin across perps and spot.

Polymarket charges up to 2% on taker orders. Maker orders are free. For a trader doing $100,000 in annual taker volume, that is $2,000 in fees per year.

Kalshi’s fees are variable and opaque, ranging from roughly 1% to 7% depending on the market and contract. On some markets, fees are embedded in the spread rather than charged explicitly. A trader doing $100,000 in annual volume on Kalshi could pay anywhere from $1,000 to $7,000 in fees.

Over a year of active trading, the fee differences compound substantially:

For more on how on-chain prediction markets work, read our guide on prediction markets on Hyperliquid.

Settlement and speed

How trades settle is a critical difference that affects both trust and capital efficiency.

Purrdict (HIP-4 on Hyperliquid)

Fully on-chain, atomic settlement. When a market resolves, winning shares pay $1 and your balance updates in the same block — under one second. No claim process. No waiting period. Your USDC is immediately available for new trades.

This speed matters for capital efficiency: your money is never locked in a settlement queue.

Polymarket (Polygon + UMA Oracle)

Settlement happens on Polygon (~2 second block times). Order matching is off-chain, meaning you trust Polymarket’s servers to match orders fairly before settling on-chain.

Market resolution uses UMA’s Optimistic Oracle, which has a challenge window. In practice, most markets resolve smoothly, but disputed resolutions can take hours or days. You also need to manually claim winnings after resolution.

Kalshi (Centralized)

Everything happens internally. Settlement is typically same-day after the event outcome is determined. It is fast and reliable, but you cannot independently verify anything. You trust Kalshi’s internal systems completely.

Custody and self-sovereignty

Purrdict

True self-custody. Your wallet interacts directly with Hyperliquid’s on-chain order book. No intermediary ever holds your funds. Your keys, your funds, verifiable on-chain.

Polymarket

Proxy wallet system. You deposit to a smart contract that Polymarket manages. It is technically non-custodial (the smart contract code is public), but the off-chain matching layer introduces a centralization point. If Polymarket’s servers go down, you cannot trade — though you can still withdraw from the smart contract.

Kalshi

Fully custodial. You deposit USD via bank transfer to Kalshi’s account. Your funds are held by the company, similar to depositing at a stock broker. Regulated and insured, but you are trusting a company to safeguard your money.

Market types and selection

Purrdict

Supports binary, multi-outcome, and recurring markets. Recurring markets are a unique HIP-4 feature — automatically rotating price-based markets that resolve daily and reopen with updated strike prices. No other platform has this.

Market selection is growing. Strong initial coverage of crypto price markets, community events, and cultural markets. The testnet has active markets including “BTC > $95k” (recurring daily), “What will Hypurr eat?” (multi-outcome), and “HL 100 meter dash” (binary).

Polymarket

The widest market selection of any platform. Covers elections, crypto, sports, entertainment, world events, economics, and more. Polymarket’s market catalog is its strongest competitive advantage.

Supports binary and multi-outcome markets, but no recurring markets — each market must be created individually.

Kalshi

Specializes in economic and regulatory markets: Fed rate decisions, CPI prints, GDP numbers, weather events, and selected political events. Binary markets only — no multi-outcome markets.

Kalshi’s market types are constrained by CFTC approval. The regulator blocked election contracts for years before allowing them in 2024. New market types require regulatory approval.

Margin model and capital efficiency

This is where the architecture truly separates Purrdict from both competitors.

Purrdict (shared margin): Your USDC collateral backs prediction market positions, perpetual futures positions, and spot positions simultaneously. A single $100,000 deposit could back a BTC perp position, an ETH prediction market bet, and a spot holding — all at the same time. This is cross-margin across asset classes.

Polymarket (siloed): Your prediction market capital is completely separate from everything else. If you have $50,000 on Polymarket, that money does one thing: back prediction market positions. It cannot earn yield, back perp trades, or do anything else until the market resolves.

Kalshi (siloed): Same as Polymarket. Your USD deposit is locked to Kalshi’s platform.

For any trader managing more than $50,000, shared margin is a meaningful advantage. It reduces the total capital needed to maintain the same set of positions, which directly improves returns.

For a deeper explanation of how cross-margin works on Hyperliquid, see our guide on shared margin.

KYC and access

Kalshi’s KYC requirement is a direct consequence of CFTC regulation. For US traders who want regulatory protection, this is a feature. For international traders or those who value privacy, it is a barrier.

Polymarket geo-blocks US users, which means the largest retail trading market in the world cannot access the largest prediction market platform. This creates a significant gap that platforms like Purrdict and Kalshi fill from opposite directions.

Regulation

Kalshi is the only CFTC-regulated prediction market exchange. This means it operates under the same regulatory framework as CME and CBOE. Traders get legal protection, FDIC-insured deposits (up to limits), and regulatory recourse for disputes. The trade-off is KYC requirements, slower market creation, and geographic restrictions.

Polymarket operates outside US jurisdiction. It is not regulated by any US authority and explicitly blocks US users. This gives it more flexibility in market creation but no regulatory protection for users.

Purrdict operates on-chain through Hyperliquid, a permissionless blockchain. There is no central entity to regulate. This provides maximum access and censorship resistance but no regulatory safety net. Users are responsible for understanding their local regulatory environment.

Performance and reliability

Hyperliquid’s matching engine processes over 200,000 orders per second — capacity built for handling $200B+/month in perp volume. Prediction markets use the same engine, so they benefit from the same performance and reliability.

Who should use each platform?

Choose Purrdict if:

• You are crypto-native and comfortable with Web3 wallets
• You want sub-second on-chain settlement
• You value fully on-chain transparency and self-custody
• You already trade on Hyperliquid and want shared margin across perps, spot, and prediction markets
• You want access to recurring markets (unique to HIP-4)
• You do not want KYC requirements

Choose Polymarket if:

• You want the widest market selection and deepest liquidity available today
• You are outside the US
• You are comfortable with off-chain matching
• You prioritize market variety over technical architecture
• You want UMA’s dispute resolution for contentious outcomes

Choose Kalshi if:

• You are a US trader and want CFTC regulatory protection
• You prefer USD bank deposits and withdrawals
• You want economic, weather, and policy markets
• You are not comfortable with crypto wallets or self-custody
• You value regulated dispute resolution

Frequently asked questions

Which prediction market platform has the lowest fees?

Fee structures vary across platforms and may change over time. Polymarket charges up to 2% on taker orders (makers trade free). Kalshi charges variable fees ranging from 1% to 7% depending on the market. Check each platform for current rates.

Is Polymarket available in the US?

No. Polymarket geo-blocks US-based users and is not regulated by any US authority. US traders can use Kalshi (CFTC-regulated with KYC) or Purrdict (permissionless wallet access via Hyperliquid). The regulatory landscape is evolving, and Polymarket may seek US access in the future, but as of early 2026 it remains unavailable to US residents.

What is shared margin and why does it matter?

Shared margin means your collateral backs positions across multiple asset classes simultaneously. On Purrdict via Hyperliquid, your USDC balance backs prediction market positions, perpetual futures, and spot holdings at the same time. On Polymarket and Kalshi, prediction market capital is siloed — it can only back prediction market positions. Shared margin improves capital efficiency and lets traders do more with less.

Which platform is safest?

It depends on your definition of safety. Kalshi is the safest from a regulatory perspective — CFTC-regulated with deposit protections. Purrdict is the safest from a custody perspective — fully self-custodial with on-chain settlement, meaning no company holds your funds. Polymarket sits between the two: smart-contract custody but with an off-chain matching layer. Each model has different risk profiles.

Can I trade prediction markets and perpetual futures on the same platform?

Only on Purrdict, via Hyperliquid. Because HIP-4 prediction markets run on the same matching engine as Hyperliquid’s perps and spot markets, you can trade all three asset types from one account with shared collateral. No other prediction market platform offers this.

Which platform has the most markets?

Polymarket has the most active markets, covering politics, crypto, sports, entertainment, economics, and current events. Kalshi has a narrower selection focused on economic indicators, weather, and policy — constrained by CFTC approval requirements. Purrdict is growing its market catalog, with strong initial coverage of crypto price markets, community events, and the unique recurring market format that no other platform offers.

Read more: How prediction markets work · Prediction markets on Hyperliquid · Purrdict vs Polymarket · Purrdict vs Kalshi