Our methodology

How a network is established

A sister site, on this site, is a casino run by the same licensed company as another casino. We establish that from the UK Gambling Commission's public register, not from marketing copy or other review sites. The register lists every domain and trading name held under each licence account, with a status against each one.

• Active means the licensee runs the domain as its own brand. White Label means a partner owns the brand while the licensee holds the licence and handles complaints. Inactive means the domain is retired.
• Domains are not brands. One casino often holds several domains — a .com and a .co.uk, or separate sports and casino subdomains — and some domains are marketing pages with no casino behind them. Brand counts are checked by hand against the register and the trading-name list, and each network page shows how its count was reached.
• Coverage is always stated. Every network page and listing says how many of the operator's brands are reviewed here — "6 of 148", or "all 12". Where an operator is licensed outside Great Britain and no public domain register exists, we say that instead of guessing a total.

The network fingerprint

Before a brand page calls two casinos sister sites, we check a fixed set of signals. Each carries a weight; the matched weights add up to a fingerprint out of 100.

A fingerprint of 70 or more is recorded as confirmed, 40 to 69 as probable, and below 40 as disputed. A disputed page says so in plain words and describes the brands as licence-matched alternatives rather than verified sister sites.

Terms comparison. Where we can retrieve each brand's terms and conditions, we split every document into sentences and count how many are identical across brands. A shared legal author shows up as a high count. The number of documents compared is stated on each network page, because it varies: some operators block automated access to their terms, and a smaller sample honestly labelled is worth more than a larger one quietly implied.

What the similarity percentage means

Every sister site in a comparison table carries a similarity percentage. It is our estimate of how much of the same experience you get at that brand: shared licence, shared platform and shared bonus mechanics, less any real differences in product or offer. It is an editorial judgement, not a measurement.

A high similarity score is not an endorsement. A close copy of a weak casino is still a weak casino, which is why similarity and trust score are shown side by side and never combined.

Sister sites and alternatives are different choices

People searching for "sites like" a casino and people searching for its "alternatives" are often asking different questions, and the answer depends on why they are leaving.

• A sister site shares the operator. In Great Britain that means the same licensee handles complaints and dispute referrals, self-exclusion through GAMSTOP reaches every brand, and one welcome offer per customer across the group is the normal assumption unless the operator publishes a different rule.
• An alternative under a different operator gives you a genuinely separate company: a separate complaints process, separate identity checks and, usually, a separate welcome offer. If your problem is with the company rather than the product, this is the choice that changes something.

Brand pages list both: the sister sites on the same licence, and brands run by related but separate operators.

Claiming a welcome offer at more than one sister site

Brand pages show, sibling by sibling, whether a separate welcome offer is likely. Unless an operator publishes its own cross-brand rule — ProgressPlay, for example, states a five-brand limit in its terms — this is our reading of the brand's terms, not a result anyone has tested with multiple accounts, and the page says so.

The brand trust score

Each brand receives a trust score out of 100, the weighted sum of seven dimensions:

Every dimension is shown on the brand page with the note and evidence behind it. A dimension we have not measured scores zero and is shown as unscored rather than hidden, so a thinly researched brand never looks better than it is. Complaint records stay unscored until the regulator's published enforcement record for that licence has been read.

Network scores

The trust figure shown on a network card is the average of that network's individually scored brands, not a separate number, so it can never contradict the brand pages it summarises. Where the operator runs more brands than we review, the page states that the average covers only the reviewed ones.

How evidence is graded

• VERIFIED — Verified from primary source
• OBSERVED — Observed on site
• REPORTED — Reported by players
• TESTED — Tested with real money

Every evidence item on a brand page names its source and the date it was checked. Figures are read off screenshots captured from a GB connection wherever possible. When a cached copy of a page and a screenshot of it disagree, the screenshot wins: some casinos load their UK-specific terms below the first screen, where an automated fetch never reaches.

What our own team has tested

In August 2026 (recorded 2026-08-18) our team checked withdrawals and live chat across the brands then covered by this site. Withdrawals cleared in 5 to 15 minutes and live chat reached a person in 1 to 5 minutes. The result was recorded as a range across the portfolio, not as per-brand timings, so no brand is credited with a specific figure.

That is why payouts score 78 and support 75 rather than higher: speed was the only payout input recorded, and response time the only support input. No logged-in cashier has been opened for a method list, limits or fees, so payment tables on brand pages stay empty rather than being filled from a casino's own marketing.

One consequence is worth stating plainly, because it is the weakest part of this model and an external reviewer was right to press on it. The round produced a single range, so a brand's payout score reflects a result that covered it without being a measurement of it. Two brands with identical scores were not shown to withdraw at the same speed; they were both inside a range. Every brand page states this next to the score, and no brand is given a timing of its own anywhere on this site. Per-brand figures will replace the range when per-brand records exist, and not before.

What we do not do

• We never publish that a brand has no sister sites — only that none was found among those checked.
• We do not republish third-party review ratings as our own scores.
• Player complaint themes are paraphrased, never quoted, and each names its source.
• We do not host playable slot demos.

Editorial independence

SisterSitesHub earns commission from some operators we list (see our affiliate disclosure). That relationship has no influence on scores, ordering or what a page says a brand lacks.

Corrections

If any figure on this site is inaccurate, contact us through the contact page and we will check it against the source and correct it.