Contact Us
If you have spotted something wrong in one of our reviews, want to query how we rank UK casino sites, or simply want to ask a question about high RTP slots before you sign up anywhere, this is the page to use. Online Casinos is an independent comparison site, not a casino operator — so what we can do for you is different from what an operator's support desk can do, and it helps to know which is which before you write.
What our inbox is for
We read everything that comes in. The messages we can actually act on tend to fall into a handful of categories:
- Corrections. A bonus percentage has changed, a headline offer has been withdrawn, wagering terms have been rewritten, or a brand no longer accepts UK players. Tell us which page and which detail, and we will check it against the operator's own terms.
- Questions about our method. Why one site outranks another, what an editorial rating does and does not mean, how we treat return-to-player figures on slots.
- Feedback on the content. Sections that are unclear, comparisons you would find more useful, brands you think deserve coverage.
- Commercial and partnership enquiries. Operators and affiliates are welcome to get in touch, on the understanding set out below.
- Press and research requests. Journalists, students and researchers writing about the UK online casino market.
To reach us, use the contact form on this page. Include the page title or URL you are referring to, the brand name if your message concerns a specific casino, and any screenshot or terms wording you are quoting. Vague messages take far longer to resolve than specific ones.
What we cannot help with — and who can
We do not hold player accounts, take deposits, process withdrawals or run promotions. If your issue is with money or an account at a casino, we are the wrong door. Contact the operator's own support team first, in writing, and keep a copy of the exchange. Every licensed casino has to give you a complaints procedure and, if you exhaust it without resolution, the details of an independent adjudication service you can escalate to free of charge.
If your message is about your own gambling rather than a specific dispute, please read our responsible gambling guidance, which sets out the deposit limits, time-outs and self-exclusion tools available at UK-licensed sites and the free, confidential support services you can reach at any hour. Nothing on this site is advice to gamble, and we will not help anyone work around a self-exclusion.
How we make money, in plain terms
Online Casinos earns commission when a reader follows a link to an operator and opens an account. That is the whole commercial model, and it is worth saying openly on the page where people write to ask about it. Commission does not buy a position in our tables, does not lift an editorial rating, and does not stop us listing a drawback. A brand that pays nothing can rank above one that does. If you believe a particular ranking looks bought, say so in your message and name the page — we would rather answer that question than have it hang in the air.
Operators asking to be added should expect us to look at licensing status, the full bonus terms rather than the headline number, withdrawal timescales, game range and the quality of the responsible gambling tools before anything goes live.
Queries about the brands we list
Most reader messages name one of the casinos in our tables, usually because a welcome offer reads differently on the operator's own site. Headline bonus figures move, and the conditions attached to them matter far more than the number. These are the three we are asked about most, with the limitation we would want you to weigh alongside the offer.
Betmica
Betmica sits top of our list and attracts the most correspondence, largely because of the size of its advertised package: 570% up to £5,700 plus 270 free spins for new accounts. Offers on that scale are almost always tiered across several deposits rather than paid in one go, and they carry wagering requirements, maximum bet caps while a bonus is live and expiry windows. For a slots-led player chasing volume on high-RTP titles, the spin allocation is the part that tends to matter more than the percentage. The limitation is straightforward: a headline that large will take a substantial commitment of your own money to reach in full, and most players will never see the top tier. Read the bonus terms in full before you deposit, and check which games contribute to wagering — many high-RTP slots contribute at a reduced rate or are excluded outright.
Kikibet
Kikibet is the brand readers most often compare against Betmica, since its 350% up to £5,555 with 300 free spins lands in similar territory but leans harder on the spins. That makes it easier to evaluate for anyone whose interest is slot sessions rather than table play. The trade-off is the same one that applies across the category: free spins usually come with a fixed stake value, a capped win amount and their own wagering multiplier, so 300 spins is not 300 unconstrained chances. Check the per-spin value and any winnings cap before treating the number as the headline.
Betninja
Betninja takes a different approach, with £1,000 bonus and 100 free spins to all new players — a flatter, simpler offer that is far easier to read at a glance than the percentage-stacked packages above it. If our contact form gets a message saying "I just want to know what I'm actually getting", this is usually the sort of structure we point to. Its limitation is the flip side of that clarity: the ceiling is lower and the spin count is smaller than the packages at the top of our table, so higher-volume players may find it runs out faster. As always, the qualifying deposit, wagering multiple and time limit decide whether the simplicity is worth the smaller number.
How the headline offers compare
| Casino | Headline welcome offer | Editorial rating |
|---|---|---|
| Betmica | 570% up to £5,700 + 270 free spins | 10.0 |
| Kikibet | 350% up to £5,555 + 300 free spins | 9.9 |
| Betninja | £1,000 bonus + 100 free spins | 9.9 |
| WinnerIsland | Up to €1,000 + 100 free spins | 9.8 |
| Zombillion | 250% up to £4,000 + 200 free spins | 9.8 |
| Smash Casino | 600% up to €10,000 slots welcome package | 9.8 |
| Nightluck | €6,400 + 280 free spins + 805% | 9.8 |
| Rivo | 1000% up to €10,000 + 25% cashback | 9.6 |
| Daytonaspin | 255% up to £4,500 + 255 free spins | 9.6 |
| CoinPoker | 150% up to $2,000 | 9.6 |
Ratings are our own editorial scores, not customer review averages. All offers are new-player promotions subject to the operator's terms, minimum deposits, wagering requirements and time limits, and several are advertised in euros or dollars rather than GBP — if you deposit in pounds, currency conversion may apply. Offers change without notice; if you find one of these out of date, that is exactly the sort of message we want.
Money questions we are asked repeatedly
Using Online Casinos costs nothing. There is no membership, no paywall and no fee for reading a review — our income comes entirely from the affiliate arrangements described above. What costs money is playing, and those figures sit with the operator, not with us.
- Minimum deposits. Set by each casino and usually the qualifying threshold for a welcome package. A bonus percentage is worthless if you deposit below the qualifying amount.
- Payment methods. UK players typically see debit cards, bank transfer and e-wallets; credit cards cannot be used for gambling in Great Britain. Some brands, such as CoinPoker, are built around cryptocurrency instead. Available methods differ by operator and can differ between deposit and withdrawal.
- Withdrawal timings and limits. Processing times, daily and monthly caps and any fees are published in each casino's terms. Expect a verification step before your first payout.
- Currency. Where an offer is quoted in euros or dollars, check whether your account can be held in GBP and what conversion costs apply.
We publish what operators state. We do not process payments, cannot chase one, and cannot see your account.
What these sites actually offer
Because our focus is high-RTP slots, that is where most of our coverage sits — but the brands above are full casinos, and it helps to know the shape of the catalogue before you write in with a question about it. Broadly you will find slot machines of every stripe, from classic three-reel titles to modern video slots with bonus-buy features and progressive jackpots; RNG table games including blackjack, roulette, baccarat and casino poker variants; and live dealer rooms streamed from studios with human croupiers and real-time betting. Some also run instant-win and crash-style games alongside the main lobby.
Return to player is a long-run theoretical figure published per game, not a promise about your session. Where we discuss it, we are comparing the published rates, and we would encourage you to check the figure in the game's own information panel, since the same title can be deployed at different RTP settings by different operators.
Beyond the casino lobby
Several of the operators we list run other product lines under the same account. Sports betting is the most common, with fixed-odds markets and in-play betting that behave nothing like slots — different margins, different bonus structures and different wagering rules. Poker is its own vertical again, with CoinPoker being the clearest example of a poker-first brand among the ones above; cash games and tournaments compete against other players rather than the house, so the maths and the bonus mechanics differ completely. Virtual sports and bingo appear at some sites too. A casino welcome bonus will not usually carry across to these sections, and stakes placed there often do not count towards casino wagering. Check which product a promotion applies to before you use it.
Who can play, and what protection you have
Gambling in Great Britain is restricted to those aged 18 or over, and any operator offering remote gambling to British consumers must be licensed by the Gambling Commission. A licensed site is required to verify your identity and age, to offer deposit limits, reality checks and self-exclusion, to participate in the national self-exclusion scheme, and to give you access to free independent dispute resolution if a complaint cannot be settled.
Some brands operate outside that framework and are not covered by those protections; we cover that distinction separately on our page about casinos not on GamStop so you can see what you would be giving up. Before registering anywhere, check the licensing statement in the site footer, read the terms you are agreeing to, and confirm the operator accepts players resident in the UK. Responsibility for verifying that sits with you as well as with the operator.
Our own obligations to you as a reader are set out in the terms of use, and there is more on the team and the editorial approach on our about page.
How we assess the sites we list
We research and verify rather than test. We do not claim to have deposited, played or withdrawn at these casinos, and we will never present an advertised withdrawal speed as a measured one. Rankings are built from the licensing position, the full published bonus terms rather than the headline figure, the breadth of the slot and live catalogue, the published RTP range where operators disclose it, payment options relevant to UK players, and the quality of the responsible gambling tools. Ratings are reviewed when offers change or when a reader tells us something no longer matches. The fact-check date shown at the top of the page is when we last did that.
Response times and what happens next
We answer messages in the order they arrive, and factual corrections jump the queue because they affect other readers. If your enquiry needs us to re-verify a brand's terms it will take longer, and if it concerns an account or a payment we will point you back to the operator rather than sit on it. We do not have a phone line, and we will never ask you for account passwords, card details or copies of identity documents — no legitimate comparison site needs them.
If your question is really "which of these should I choose", the honest answer is that it depends on how you play: bigger percentage packages suit players prepared to deposit across several tiers, flatter offers suit anyone who wants to know the cost upfront, and spin-heavy bonuses suit slot sessions rather than table play. Read the terms on the operator's own site, set a deposit limit before you start, and write to us if the terms and our page disagree.