How we rate sportsbooks and prediction markets

Rating methodology

We score every sportsbook and prediction-market platform against eight criteria. Each one is scored on the same five-point scale and carries a fixed weight, so two reviews are always comparable and no single review is graded on a curve. Where we can measure something directly — pricing, above all — the score comes from data, not impressions.

The scoring system

Each criterion is scored from 1 to 5. The overall rating is the weighted average of all eight scores — using the weights above — rounded to one decimal place. Pricing carries the most weight because the best available number is the most reliable edge any bettor has; responsible-gambling tools and support round out the score so a book can’t buy its way to the top on promos alone.

Where a live figure exists — such as a book’s best-price rate from our comparison data — that score is computed directly. Where a measure isn’t yet wired into live data, we use a documented editorial baseline and label the rating as illustrative until the feed is connected. We never present an estimate as a measurement.

Editorial independence

OddsGrab earns commissions when readers sign up with a platform through our links. Those commercial relationships never influence a rating, a ranking, or which price we highlight. The best price is the best price, regardless of whether the book pays us a referral fee — and our comparison tools surface it on the merits, every time.

Affiliate terms and editorial scoring are kept strictly separate. No operator can pay for a higher rating, a better placement, or a more favourable review, and we will rate a non-partner above a partner whenever the data says so. Every page that contains affiliate links discloses it plainly.

How often we update

We re-check every review at least once per quarter, and immediately when something material changes — a new welcome offer, a state launch, an app overhaul, or a clear shift in pricing. Every review page carries its own “Last verified” date so you can see exactly how current it is before you act on it.

Content standards

Reviews and guides are written and maintained by the OddsGrab editorial team and held to a single bar: a reader should be able to act on what we publish without second-guessing it. We write in plain English, explain the trade-offs rather than hide them, and avoid marketing language that we wouldn’t stand behind.

Fact-checking

Anything that can be measured is pulled from our own comparison data or from the operator’s published terms — not from memory or marketing copy. Promo terms, banking details, and legal availability are checked against primary sources before they go live, and re-checked on the quarterly cadence above.

Data sources and attribution

Odds and contract prices come from the sportsbooks and prediction markets we compare. Legal-status and licensing details come from state regulators and the operators’ own disclosures. We cite primary sources where we reference them, date anything time-sensitive, and never present another site’s figures as our own.

Corrections

When we get something wrong, we fix it as soon as we can and update the “Last verified” date. Odds and prices move fast, so always confirm the current number on the operator’s site before placing a wager.