What is Locks.bet?

The OddsChecker for prediction markets. One search, all exchanges, real prices.

What Are Prediction Markets?

Prediction markets let people buy and sell contracts that pay out based on the outcome of real-world events. If you think the probability of an event is higher than the current market price, you buy. If you think it's lower, you sell. The market price represents the crowd's collective estimate of the probability.

For example, a contract that pays $1 if "X wins the election" trading at 65¢ implies the market believes there's a 65% chance X wins.

What Exchanges Exist?

K

Kalshi

US-regulated, CFTC-licensed exchange. Prices in cents (1–99¢). Known for political and economic markets. Accessible to US residents with standard KYC.

P

Polymarket

Decentralized, blockchain-based exchange on Polygon. Prices as decimals (0–1). Generally higher liquidity on political markets. Some markets are fee-free; fee-enabled markets charge taker fees.

Why Do Prices Differ Across Exchanges?

The same real-world event often has active markets on multiple exchanges, and those markets frequently price the same question differently. This happens because:

  • •Different user bases — Each exchange has its own community with different beliefs and information.
  • •Different fee structures — Fees shift the effective price you pay. Kalshi charges taker fees, and some Polymarket markets do too.
  • •Different liquidity — Thin order books distort quoted prices. A market with low liquidity may show misleading prices.
  • •Subtle contract differences — Even markets about the "same" event may have different resolution criteria or close dates.

What Locks.bet Does

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Universal Search

Search once, find markets across all exchanges. Our AI-powered matching groups the same market across venues so you see one result, not duplicates.

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Fee-Adjusted Prices

Every price includes fees by default. You see what you'll actually pay, not the raw price that hides costs.

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Cross-Exchange Comparison

When the same market exists on multiple exchanges, we show you side-by-side with the best price highlighted. Like Google Flights for prediction markets.

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Liquidity Signals

We show whether a market has deep, moderate, or thin liquidity so you know if the quoted price is actually achievable.

How to Use Locks.bet

  1. 1Search for any topic — elections, Fed decisions, AI milestones, sports outcomes, anything with a prediction market.
  2. 2Compare prices across exchanges. See which exchange has the best price after fees and how deep the liquidity is.
  3. 3Trade on the exchange of your choice. Click the trade link to go directly to the contract on Kalshi or Polymarket.

Ready to find the best odds?

Start searching prediction markets across all exchanges.

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