About, disclosures and privacy.
Short, because there isn't much to say. Nothing on this site is advice and nothing on it places orders.
What this is
VenueGap reads public market data from two prediction-market exchanges, Kalshi and Polymarket, finds the events both of them list, matches each outcome to its twin on the other venue, and shows where the two prices disagree. It refreshes every 45 seconds. It is not affiliated with, endorsed by, or connected to either exchange.
How the numbers are made
- Games are matched by league, team codes and date; multi-outcome markets (nominations, futures, Fed meetings) by outcome name. A match that cannot be made with confidence is dropped rather than guessed.
- Polymarket prices come from its live order book; Kalshi prices from its public API. Prices shown are mid-market unless labeled bid and ask.
- Prices are dollars on a contract that pays $1 if the outcome happens, so $0.62 is a 62% chance. The gap is the Kalshi price minus the Polymarket price.
- The edge is what would be left from $1 after buying one side on one venue and the other side on the other, both at the ask, minus each venue's published taker fee. It ignores order size, slippage, withdrawal costs and the time it takes to move money. Treat it as a description of prices, not an instruction.
- Markets with no two-sided book or a spread wider than $0.10, and favorites priced at $0.95 or more, are hidden by default because their gaps are rounding, not disagreement.
How the site makes money
Paid plans. Game Day, Trader, Desk and Server are monthly or yearly subscriptions billed by Stripe. Every plan renews automatically at the price you joined at until you cancel; you can cancel any time from your settings page and it ends at the end of the period you paid for. The price you join at does not change while you keep the subscription, even when the seat counter moves the price for new customers; if we ever change a price for existing subscribers we will email at least 30 days ahead and you can cancel before it applies. Prices shown exclude sales tax where Stripe is required to collect it.
Refunds. Email hello@venuegap.com within 7 days of your first charge on a new subscription and it is refunded in full, no questions. Renewals, plan changes and lifetime seats are not refundable after 7 days from that first charge; a plan change is prorated automatically. Founding Pro members who joined at $12 keep $12 and every Trader feature for as long as they stay.
Server licence. The Server plan licenses you to redistribute VenueGap alerts to a community you run (a Discord, Telegram or similar), with the "via VenueGap" line kept on each alert, for the term of the subscription. It does not license resale of the data, removal of the attribution line, or use in a product that competes with VenueGap. Other plans are for personal use in your own accounts and personal servers.
Nothing here is advice. Alerts, gaps, edges and sportsbook discounts describe prices; they are not recommendations to trade, and no plan promises any result. Past gaps and past scoreboard results do not predict future ones. You trade on Kalshi or Polymarket yourself, in your own accounts, under their terms; VenueGap never places, routes or holds anything.
Affiliate disclosure. Links from this site to Kalshi and Polymarket may be referral links. If you sign up or trade through one, the exchange may pay this site a referral fee or a share of trading fees. That never changes the prices shown, the order of anything on the page, or whether an event appears. Both exchanges' referral terms forbid us from referring ourselves, and we don't.
The site may also apply to the exchanges' builder or grant programs. It does not sell picks, signals, or access to anyone's trading account.
What we store about you
- No cookies, no tracking pixels, no third-party analytics. Your browser keeps your own preferences (theme, filters, watchlist) in its local storage; that data never leaves your device.
- Usage counts. The site records that a page was viewed, an event was expanded, or an outbound link was clicked, with the category and, for views, the referring site. No IP address, user id, or fingerprint is stored with these events.
- Email list. If you ask for the morning report, we store your email address, a random token used for your confirm and unsubscribe links, the status of your subscription, and timestamps. Nothing is sent until you click the confirmation link. Every email carries a one-click unsubscribe. An unsubscribed address is kept only as a suppression record so it is never emailed again. Emails are delivered through Resend, which processes the address to deliver the message.
- Rate limiting. To stop abuse, the server keeps a short-lived, in-memory count of requests per connection address. It is not written to disk.
- Where it lives. On the server that runs the site and in a daily backup. To have your address removed entirely rather than suppressed, email the address in the footer.
Data and reuse
Everything on the screener is available as JSON at /api, free, with attribution. The underlying prices belong to the exchanges and to the people trading on them; this site claims nothing but the matching and the arithmetic.
Contact
Corrections, a market that looks mis-matched, a league you want covered: hello@venuegap.com.
Last updated September 2026.