Priced after fees
Kalshi's taker fee can erase a 1–2% edge. We show the edge you keep, for taking or for resting an order.
For Kalshi, Polymarket & the new sports exchanges
Only take the bets the math likes.
Plusline compares every prediction-market price to the sharpest sportsbook lines, after fees and at the size you can actually fill, then pings you when a contract is underpriced.
NFL · Ravens vs Cowboys · Sun 4:25pm
Ravens to win: +4.0% on Kalshi, after fees
- Kalshi ask
- 45¢
- Fair (sharp, no-vig)
- 48.6¢
- Taker fee
- 1.7¢
- Fillable at this price
- $620
✓ Settlement rules checked · Re-verified 3s ago
Why prediction markets
Sportsbooks limit you the moment you start winning. Exchanges like Kalshi don't. The catch: thin order books, fees that eat small edges, and "identical" markets that settle differently. Most +EV tools were built for sportsbooks and treat exchanges as just another book.
Plusline is exchange-first
Every alert is priced the way an exchange actually fills: against the live order book, with the venue's real fee schedule, at a size you can get. If it isn't still there when we check again, you never see it.
What you get in every alert
Real size, not top-of-book
We walk the order book and tell you how many dollars are available before the edge disappears.
Rules-checked
Ties, postponements, overtime: we flag markets whose settlement rules don't match the sharp line.
No stale edges
Lines move. Every edge is re-verified against fresh prices before it reaches your phone.
How it works
- We watch the markets. Kalshi and the other US exchanges, next to sharp sportsbook lines, around the clock.
- We find the mispricing. Remove the bookmaker's cut from the sharp line to get a fair price, then compare it to what the exchange is selling.
- You get a ping. Telegram, Discord or text, with the edge, the size and a link. You decide whether to trade.
Questions
Do I win every bet?
No. +EV means the price is better than the true odds, so you come out ahead over many bets, not every bet. Expect losing days. That's how the math works.
Which markets will you cover?
We're starting with Kalshi game-winner markets for the NFL, college football, MLB, NBA, NHL and WNBA, priced against sharp sportsbook lines. Polymarket US, Novig and ProphetX are next.
Is Plusline a sportsbook or betting advice?
Neither. Plusline is an information tool. We never hold your money or place trades, and every decision is yours. Access to each exchange depends on your state.
When does it launch, and what does it cost?
Founding members get access first, later this year. The planned price is $49/month. Founding members lock in $29/month for as long as they stay subscribed.