Linewhale is an odds comparison platform that helps sports bettors get the best price on every bet. It pulls real-time lines from top sportsbooks and prediction markets like Kalshi and Polymarket into one clean view, so you can see which book has the best number in seconds. Small differences in odds add up over a season, and Linewhale makes sure you're never leaving that value on the table. It's free to use, independent, and built for both casual and serious bettors.
Features
Free: Real-time odds comparison across major sportsbooks and prediction markets, with the best line highlighted. Per-sportsbook line movement charts, sportsbook rankings, and calculators for converting odds, building parlays, hedging bets and checking arbitrage. A free account adds 30-day multi-book line history, saved favorites, and the option to hide sportsbooks you don't use.
Premium ($25/month, or $20/month billed annually): Advanced tools for sharper bettors. The Arbitrage Finder spots guaranteed-profit price gaps between books. The Positive EV Finder flags bets priced in your favor against a no-vig market consensus. The Middle Finder surfaces spread and total gaps where both sides can win. Steam Moves alerts you to sharp, synchronized line moves as they happen.
Use Cases
- Line shopping: A casual bettor checks Linewhale before placing a bet and takes the best available price instead of settling for whatever their default app offers.
- Tracking the market: Bettors watch how a line has moved since it opened to see where the money is going before they commit.
- Sportsbooks vs. prediction markets: Traders compare Kalshi and Polymarket prices against sportsbook odds to find where the two disagree.
- Advantage betting: Sharper bettors use the premium finders to build a steady routine around arbitrage, +EV and middle opportunities.
- Managing bets: Bettors use the hedging and parlay calculators to lock in profit, cut losses, or check a payout before they bet.
Comments
I used to bet across several sportsbooks myself and kept running into the same annoying routine: open five apps, check the same game in each, and try to remember which book had the best number. The tools that solved this well cost well over $100/month, and the free odds sites felt cluttered or only covered a handful of books. I wanted something informative, fast, clean and affordable, so I built it.
Premium Products
Sponsors
Buy
Makers
Makers
Comments
I used to bet across several sportsbooks myself and kept running into the same annoying routine: open five apps, check the same game in each, and try to remember which book had the best number. The tools that solved this well cost well over $100/month, and the free odds sites felt cluttered or only covered a handful of books. I wanted something informative, fast, clean and affordable, so I built it.
Premium Products
New to Fazier?
Find your next favorite product or submit your own. Made by @FalakDigital.
Copyright ©2026. All Rights Reserved