Reference

These pages are not opinions and they are not predictions. Each one takes a question, states the current measurement, and shows the table it came from. They are refreshed on a schedule rather than written once, so the answer on the page is the answer as of the date beside it and not the answer from whenever it was first published.

Deliberately, no page here carries a book's name in its address or its title. Who is winning on price changes, and a URL that named today's leader would still be saying it years from now.

• Best-Price Leaderboard: Which sportsbook has the best odds?
  Novig posted the single best price most often over the last 30 completed days, on 53.3% of the 170,819 scanned prices where it quoted a side. DraftKings was second at 34.4% across 366,216 scans.
• Exchange and Prediction-Market Pricing, Measured: Do prediction markets have better odds than sportsbooks?
  Polymarket US posted the best price most often across 726 matched games over the last 30 days, on 28.4% of 51,051 matched price checks, ahead of FanDuel at 17.7%. So a prediction market can and does beat the sportsbooks on price on this set. An exchange is not automatically a better price and not automatically a worse one: the ranking moves by sport, by market and by week, so it has to be checked rather than assumed. Kalshi, priced at the executable ask with its taker fee applied rather than at the screen price, was best on 12.3% of the same checks.
• How Far Each Book Prices From The Market: Which sportsbooks are slow or off-market on price?
  On MLB moneylines 6 hours before the start, ProphetX priced closest to the rest of the market over 30 days, at 0.27 probability points of average distance across 357 quotes, and BetParx sat furthest at 0.77 points. Distance is not the same as being wrong: it says a book is doing its own thing, not that its own thing is worse.
• The price archive: the rows every figure on these pages is computed from, free and unauthenticated.