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OddsGuard

Real-Time Sports Betting Odds Comparison

Compare odds from 75+ sportsbooks across 17 sports and 559 leagues. The free OddsGuard browser extension overlays better prices directly on the betting site you already use.

Available in United States, United Kingdom, Australia, Canada, Ireland, New Zealand

What is OddsGuard?

OddsGuard is a free browser extension that overlays real-time odds from 75 sportsbooks directly on the betting site you're already using. No extra tabs, no subscription, no account required.

How it works

  1. 1Install the free extension (10 seconds)
  2. 2Open any supported sportsbook (DraftKings, Bet365, FanDuel, etc.)
  3. 3See better prices highlighted automatically on every bet
Also onSafari·Edge·Windows·Mac
Free forever No registration Privacy first
sportsbook.com/futures
Super Bowl Winner
Chiefs+450
+$12
Eagles+600
+2.1% EV
Bills+800
👍
Lions+900
👍
49ers+1000
+$8
Ravens+1100
👍
Bengals+1400
+0.8% EV
Cowboys+1600
+$12

OddsGuard overlay — badges appear automatically on your sportsbook

Choose Your Country

United States flag

United States

Compare odds from top United States bookmakers across 17 sports

View United States odds →
United Kingdom flag

United Kingdom

Compare odds from top United Kingdom bookmakers across 17 sports

View United Kingdom odds →
Australia flag

Australia

Compare odds from top Australia bookmakers across 17 sports

View Australia odds →
Canada flag

Canada

Compare odds from top Canada bookmakers across 17 sports

View Canada odds →
Ireland flag

Ireland

Compare odds from top Ireland bookmakers across 17 sports

View Ireland odds →
New Zealand flag

New Zealand

Compare odds from top New Zealand bookmakers across 17 sports

View New Zealand odds →
🎁 Bonus Tracker

Never Miss a Bonus Again

Every active promo from every sportsbook — deposit bonuses, free bets, odds boosts — organized in one tab inside OddsGuard. Geo-filtered to your state. Updated in real time.

30+ active promotionsacross all major sportsbooks
Also onSafari·Edge·Windows·Mac
BetMGMFree Bet
Up to $1,500
Claim Bonus
DraftKingsBonus Bets
$200 Bonus Bets
Claim Bonus
FanDuelBonus Bets
$150 Bonus Bets
Claim Bonus
CaesarsCash Bonus
Up to $1,000
Claim Bonus
BetRiversFree Bet
2nd Chance $500
Claim Bonus
PointsBetBonus Bets
5x $50 Bonus Bets
Claim Bonus
BetMGMFree Bet
Up to $1,500
Claim Bonus
DraftKingsBonus Bets
$200 Bonus Bets
Claim Bonus
FanDuelBonus Bets
$150 Bonus Bets
Claim Bonus
CaesarsCash Bonus
Up to $1,000
Claim Bonus
BetRiversFree Bet
2nd Chance $500
Claim Bonus
PointsBetBonus Bets
5x $50 Bonus Bets
Claim Bonus

17 Sports Categories · 559 Leagues

American Football
American Football
8 leagues
Basketball
Basketball
48 leagues
Soccer
Soccer
165 leagues
Tennis
Tennis
128 leagues
Baseball
Baseball
11 leagues
Golf
Golf
65 leagues
MMA
MMA
8 leagues
Boxing
Boxing
1 league
Aussie Rules
Aussie Rules
3 leagues
Cricket
Cricket
47 leagues
Ice Hockey
Ice Hockey
25 leagues
Lacrosse
Lacrosse
2 leagues
Politics
Politics
1 league
Rugby League
Rugby League
4 leagues
Rugby Union
Rugby Union
11 leagues
Handball
Handball
24 leagues
Disc Golf
8 leagues

Frequently Asked Questions

What is OddsGuard?
OddsGuard is a free real-time sports odds comparison service. Whenever you view a market on a supported sportsbook, OddsGuard shows you the same selection's price across our feed of 75+ price comparison sources so you can weigh prices and promotions side-by-side before you bet. We do not take bets — we only compare prices.
How does OddsGuard work?
When you land on a supported sportsbook, OddsGuard reads the odds already visible on the page and cross-checks them against our live feed from other sportsbooks. If a better price exists elsewhere, you see it right on the page via an inline overlay next to the original odds. The extension doesn't log in to your sportsbook account, touch your balance, or place bets.
Is OddsGuard free to use?
Yes. The browser extension, the Safari app for iPhone / iPad / Mac, and the embeddable widget are free. Core odds comparison, bookmaker recommendations, basic notifications, and price data from our 75+ sources are all included at no cost.
Which browsers and devices are supported?
OddsGuard ships as: (1) a browser extension for Chrome, Brave, Edge, and other Chromium browsers, (2) a Firefox add-on, (3) a Safari extension via our iOS app (iPhone / iPad) and our macOS app, and (4) a Windows desktop app for users who want it to run alongside any browser. An embeddable widget is also available for website owners.
Which sportsbooks does OddsGuard compare?

Two answers, because the two numbers are different:

  • Extension overlay: The browser / Safari extension’s on-page overlay activates on 39 specific sportsbook sites today — those are the pages where OddsGuard reads the odds you’re looking at and injects a comparison right next to them. See the full list with logos in Supported Sportsbooks.
  • Price comparison feed: The prices we compare those odds against come from a broader feed of 75+ sources, including major US books (DraftKings, FanDuel, BetMGM, Caesars, BetRivers, theScore Bet, Bovada, BetOnline), UK / European books (Bet365, William Hill, Betfair, Paddy Power, Ladbrokes, Coral, Sky Bet, Betfred, BoyleSports, Unibet, 888sport, LeoVegas, Casumo, Betsson, BetVictor, Betway, Grosvenor, and more), and exchanges / sharp books (Pinnacle, Smarkets, Novig, ProphetX, Kalshi). See the full list with logos in Comparison Sources.

Wondering which books are available where you live? See the Odds by Country directory in the footer.

Which sports and leagues are covered?
OddsGuard covers the major sports worldwide: American Football (NFL, NCAAF, CFL, UFL), Basketball (NBA, NCAAB, WNBA, Euroleague), Soccer (EPL, La Liga, Bundesliga, Serie A, Ligue 1, Champions League, MLS, and 100+ other leagues), Baseball (MLB, NCAAB, NPB, KBO), Ice Hockey (NHL, SHL, KHL), Tennis (ATP, WTA, Grand Slams), Cricket (IPL, Test, T20, ODI), Golf (Masters, PGA, European Tour, LIV), MMA, Boxing, Rugby League & Union, Aussie Rules, Lacrosse, Darts, Snooker, Cycling, and more. The exact leagues active each day are shown in the app.

Stop Leaving Money on the Table

Same Bets. Better Prices. Found Instantly.

The same 4-leg parlay can pay $10,000s more at a different sportsbook. OddsGuard finds the best price across 75 books in real time — replacing tools that charge $200–$600/month.

Also onSafari·Edge·Windows·Mac
Free foreverNo registrationNo credit cardUninstall anytime

Best Pricing in Your Region

Best PriceKalshi
Return: $6,359
+6259
Pinnacle
Return: $4,729
+4629
BetOnline
Return: $4,485
+4384
BetUS
Return: $4,136
+4036
Same 4-leg parlay · $2,223 difference

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