About Us

Sites Not On Gamstop exists to give UK players clear, honest information about online casinos that operate outside the Gamstop self-exclusion scheme. This page explains who we are, how we work, and what you can expect from every review and ranking you find here.

Who We Are

We are an independent comparison and review team based in the UK. Our focus is researching non-Gamstop casino sites — their game libraries, bonuses, payment options, licensing, and overall player experience — so that readers can make informed decisions before they sign up or deposit.

We have no affiliation with any of the casinos we cover. Our editorial positions are formed through research and verification, not through commercial pressure. Some links on this site are affiliate links, which means we may earn a commission if you visit a casino through one of them. That commercial relationship does not influence how we rank or score any site — a casino cannot buy a higher position.

What We Cover and Why

Our primary focus is casinos and betting sites that accept UK players but are not registered with Gamstop. These sites are typically licensed in other jurisdictions — such as Curaçao, Malta, or Gibraltar — and are not bound by the Gamstop exclusion database. They are a legal option for adults aged 18 and over in the UK who wish to play at internationally licensed sites.

We also cover the topics that matter most when choosing one of these sites: welcome bonuses and their real conditions, the games on offer (slots, table games, live dealer), payment methods available to UK players in GBP, and the responsible gambling tools each site provides even outside the UKGC framework.

For a full rundown of our top-rated picks, see our Non Gamstop Casinos UK 2026 – Top Rated Sites Reviewed page.

How We Research and Rate Sites

Every site we feature is reviewed against a consistent set of criteria. We do not claim to have deposited or played at each casino ourselves — our process is research and verification-based. Here is what we assess:

• Licensing and legal standing — which jurisdiction licences the operator, what that means for player protections, and whether the licence is verifiable.
• Return to player (RTP) — we prioritise sites whose game catalogues include transparently labelled RTP figures, since higher and published RTPs are a meaningful indicator of fairness.
• Bonus value and conditions — headline offer size, wagering requirements, eligible games, time limits, and maximum withdrawal caps are all checked. A large bonus with punishing terms scores lower than a modest one with fair conditions.
• Game variety and software quality — the breadth of slots, table games, and live dealer options, and the reputation of the studios behind them.
• Payment methods for UK players — availability of GBP accounts, speed of withdrawals, and whether common UK methods (cards, e-wallets, bank transfer) are supported.
• Responsible gambling tools — deposit limits, session reminders, self-exclusion options at site level, and signposting to support organisations.
• Customer support — availability, response channels, and quality of assistance as reported through publicly available player feedback.

Scores are assigned editorially on a scale up to 10. Commercial relationships do not buy position — the ranking reflects our assessment, and every recommendation on this site carries at least one genuine limitation alongside its strengths.

The Sites We Currently Recommend

The casinos ranked and reviewed on Sites Not On Gamstop were selected because they meet our minimum standards across licensing, game quality, and payment reliability. Here is a brief overview of our current top-rated options:

Smash Casino — Rated 9.9

Smash Casino sits at the top of our rankings primarily because of the depth and quality of its slot catalogue and the transparency of its RTP data across games. Its headline welcome offer — a 600% match up to €10,000 on slots — is one of the more generous structures we have reviewed, though the percentage and cap mean players should read the associated wagering terms carefully before depositing. As with any large-percentage bonus, the turnover requirement attached to it is the figure that really determines value. The site's limitation worth noting is that the bonus is slots-specific, so players who prefer table games or live dealer will find the welcome package less relevant to their play style.

Betninja — Rated 9.7

Betninja earns its second-place position through a combination of a straightforward welcome offer — £1,000 bonus plus 100 free spins for new players — and a broadly accessible game library. The GBP-denominated bonus is a practical advantage for UK players who prefer to avoid currency conversion costs. Betninja also covers sports betting alongside its casino product, making it a genuine option for players who want both under one login. Its limitation is that the free spins are tied to specific titles, so the full value of the offer depends on whether those games appeal to you.

WinnerIsland — Rated 9.6

WinnerIsland places third on the strength of its live dealer offering and a welcome bonus of up to €1,000 plus 100 free spins that applies across a wider range of game types than some competitors. For players whose priority is RTP transparency, WinnerIsland's approach to displaying game information is a positive. The limitation here is that the site's payment processing times for withdrawals can vary depending on the method chosen, so it is worth checking the terms for your preferred option before committing.

Zombillion — Rated 9.5

Zombillion stands out for its welcome pack structure — 250% up to £4,000 plus 200 free spins — which is denominated in GBP, a straightforward advantage for UK players. The free spin allocation is among the higher counts we have seen at this rating tier. Its limitation is that the 250% match, while substantial, requires players to review the maximum bet per spin during bonus play, as exceeding it can void the bonus entirely — a common condition worth understanding before playing.

Gambiva — Rated 9.3

Gambiva's 800% up to €10,000 welcome offer is the highest percentage match in our current rankings. That figure makes it appealing on paper, but percentage-led bonuses of this scale almost always come with the most demanding wagering requirements — readers should treat the 800% as an attention-getter and focus their evaluation on the actual playthrough conditions. Gambiva earns its place in our top five for RTP-labelled game availability and a broad software provider selection, but it is better suited to experienced players who understand bonus mechanics than to newcomers.

Our Position on Responsible Gambling

We recognise that the readers of this site include people who have previously self-excluded through Gamstop. We provide information; we do not pressure anyone to sign up to any site. Every casino we recommend should offer its own deposit limits, cooling-off periods, and self-exclusion tools, independent of Gamstop. We encourage all players to use those tools if they need them.

For further information on managing your gambling, visit our Responsible Gambling page, which lists UK support organisations and explains the options available to you.

Legal Position for UK Players

Playing at an internationally licensed casino that is not registered with Gamstop is not illegal for UK adults aged 18 and over. These sites operate under licences issued by overseas regulators. They are not covered by the UK Gambling Commission's consumer protection framework, which means the complaints process, dispute resolution rights, and player fund protections that apply to UKGC-licensed sites do not automatically extend to them. Players should be aware of this distinction and review each site's own terms regarding disputes and fund protection before depositing.

Transparency and Corrections

We review and update our content regularly. Bonus offers, terms, and site features change frequently in this industry, and we aim to keep our information current. If you believe something on this site is inaccurate or out of date, we want to know. You can reach us through our Contact Us page.

Our Terms and Conditions set out the full basis on which this site operates, including the scope of our liability and the nature of the affiliate relationships we hold.

Who This Site Is For

Sites Not On Gamstop is written for adults aged 18 and over in the UK who are looking for factual, unspun information about casinos that sit outside the Gamstop network. If you are researching options, comparing bonuses, or trying to understand how these sites differ from UKGC-licensed operators, this is the resource we have built for you. If you are in a period of self-exclusion and are finding it difficult, please visit our responsible gambling page before proceeding.