Casumo Sister Sites

What sister sites actually means when researching Casumo

When UK players search for Casumo sister sites, they are usually chasing one of two different answers. Some want to know whether Casumo shares an owner, a licence, or a platform with another casino, while others are simply hunting for a similar-feeling casino to try next. Both questions are reasonable, but they lead to very different answers.

A genuine sister site normally shares a corporate parent, the same UK Gambling Commission licensee, or an identical back-end platform as the original brand. That kind of link can mean shared account terms, overlapping bonus rules, or even a single self-exclusion record that covers both casinos automatically. A casino that simply looks or plays similarly, on the other hand, is a comparison-only brand rather than a true family member.

Mixing the two categories up matters more than it might first appear. If a player assumes a “sister site” shares protections, deposit limits, or loyalty status with Casumo when it actually doesn’t, they could end up making decisions based on a false sense of continuity. That’s why our sister-sites hub keeps confirmed operator links clearly separated from general recommendations across every brand we research, including Casumo.

Throughout this page we’ve applied the same standard: confirmed licensing and operator details come first, followed by casinos historically associated with Casumo’s wider corporate structure, and finally the brands that reviewers commonly suggest as comparison options simply because they suit a similar type of player. Where a connection can’t be verified from public information, we say so plainly rather than guessing.

It also helps to remember that casino “sister site” lists circulating online are often compiled from marketing associations or historical ownership rather than current UK licensing records, so a brand mentioned elsewhere as linked to Casumo may not actually be available to UK customers at all.

Whichever type of brand you’re comparing, the safer gambling principles that apply to Casumo apply equally elsewhere, and it’s worth understanding how we reach our conclusions before treating any “sister site” claim as fact. You can read more about our research approach on our about page.

Casumo’s operator, licensing structure and confirmed brand links

Casumo is operated by Casumo Services Limited, a Malta-registered company, and the brand holds licences from the Malta Gaming Authority and the UK Gambling Commission for its UK-facing operations. Some recent reviews reference a different UK licensee name for Casumo’s British operations, which suggests the underlying corporate structure may have changed at some point; anyone relying on this detail for a specific decision should check the licensee named in Casumo’s own footer against the UK Gambling Commission’s public register.

Casumo also sits beneath a wider holding structure, often referred to in industry commentary as Casumo Holding PLC, which is reported to be privately owned by a small group of shareholder entities. We can’t independently verify every detail of that ownership chain from public sources, so we’re presenting it here as reported background rather than a confirmed fact.

The table below summarises how Casumo and the brands most commonly mentioned alongside it compare on licensing, based on the research available at the time of writing.

Based on the research we reviewed, there is currently no other consumer-facing casino brand that shares Casumo’s specific UK Gambling Commission licence, which means there isn’t a confirmed direct UK sister site for Casumo at the time of writing. This differs from operators that run several UK brands under one licence, where a single account, self-exclusion record, or set of terms can genuinely apply across multiple sites.

Licensing structures do shift over time as companies restructure or launch new brands, so it’s worth checking back periodically rather than assuming today’s picture is permanent, particularly if you want to understand how claims like this get verified before treating any single review as final. You can read more about our research approach on our how we rate page.

Why UK players are told Casumo has no confirmed sister site

Several independent reviews reach the same conclusion: Casumo currently functions as a standalone brand for UK players rather than one of several casinos sharing a single UK licence. That’s different from many other well-known operators, where one licensee runs half a dozen or more consumer-facing brands under a single umbrella, meaning a single account or self-exclusion choice can cover every site in that family.

Some research even distinguishes between a genuine sister site and a white label arrangement, where a separate brand uses the same UK licence holder without sharing the parent company’s public identity. According to the sources we reviewed, no other consumer-facing casino currently sits under the same UK licensee as Casumo, so neither a direct sister site nor a white label version appears to exist for UK customers right now.

The brands most often mentioned alongside Casumo, including Dunder Casino, Kazoom Casino and CasinoSecret, are historically linked to the wider Casumo corporate group but appear to target other European markets such as Sweden rather than the UK. Because they aren’t confirmed to hold a UK Gambling Commission licence or accept UK customers, they can’t reasonably be described as UK sister sites, even though several casino directories list them that way.

Given how often unverified “sister site” lists circulate online, it’s worth treating any claim about Casumo’s family of brands with some scepticism until you’ve checked the operator’s own licensing footer or the UK Gambling Commission’s public register yourself. Our casino guides explain how to read licensing information properly if you want to verify a brand independently rather than relying on a secondhand list.

In practice, this means a search for “Casumo sister sites” from a UK player is less about finding a hidden family of casinos and more about finding well-matched comparison options, which is exactly what the rest of this page focuses on.

Casumo Holding brands compared with genuine UK sister sites

Several casino directories describe Dunder Casino, Kazoom Casino and CasinoSecret as Casumo’s sister sites, based on a reported shared ownership structure under the wider Casumo corporate group. It’s worth being clear about what that actually means for a UK player: a historical corporate link is not the same as a confirmed UK licence, and none of these three brands appear on the same UK Gambling Commission footprint as Casumo itself.

Dunder Casino

Dunder is frequently named alongside Casumo because both brands emerged from a similar Scandinavian gaming background and reportedly sat under the same holding structure at various points. Where Casumo leans into playful, story-driven branding, Dunder is generally described as a simpler, more stripped-back experience built around the game library itself. We haven’t found confirmation that Dunder currently holds a UK Gambling Commission licence, so UK players shouldn’t treat it as an available or verified comparison option without checking directly first.

Kazoom Casino

Kazoom is another brand commonly mentioned in the same breath as Casumo, with some sources describing a fast, no-frills registration process as its main distinguishing feature. As with Dunder, the material available to us doesn’t confirm a current UK licence or UK market availability for Kazoom, so it sits in the same “historically linked, not confirmed for UK” category rather than being a verified sister site.

CasinoSecret rounds out the trio most often cited in these lists, and again the pattern repeats: a reported connection to the wider Casumo corporate group, but no confirmed UK licensing detail in the sources we reviewed. Rather than assume any of these three brands are open to UK customers on the same terms as Casumo, treat them as background information about Casumo’s corporate history until you’ve verified availability yourself.

If you’re trying to understand how genuine shared-licence casino families work elsewhere in the market, our operator networks page breaks down how some UK-facing groups do run multiple confirmed sister brands under one licence, which is a useful comparison point against Casumo’s more standalone UK setup.

Comparable comparison options to Casumo for UK players

Because there isn’t a confirmed UK sister site for Casumo at the time of writing, most of the value in a search like this comes from finding well-matched comparison options instead. Reviewers tend to group these brands by look and feel: a similarly large game library, a comparable live casino section, and a mobile experience that suits players who enjoyed Casumo’s app-first approach.

None of the casinos below are confirmed to share an owner or a UK licence with Casumo. They’re grouped together purely because independent reviews repeatedly mention them as comparable experiences, not because of any verified corporate connection.

• LeoVegas – a long-established, mobile-first casino with a broad slot and live dealer selection that regularly comes up as the closest match to Casumo’s overall feel.
• Unibet – combines a sizeable casino with sports betting under one account, appealing to players who want more than slots and table games.
• PlayOJO – known for a transparent, low-wagering approach to spins and promotions, often suggested to players who found Casumo’s own bonus terms restrictive.
• 888 Casino – a long-running UK brand with a wide game catalogue and a straightforward, less gamified layout than Casumo.
• Kwiff – a newer entrant often mentioned for its playful odds-boost style promotions, drawing a similar type of player to Casumo’s gamified rewards.
• Bwin – a sportsbook-led brand with a solid casino section, useful for players who split their time between sports and slots.
• LuckyMate – a smaller, slots-focused brand sometimes suggested as a lighter-touch comparison option to Casumo’s larger library.

Every brand on this list operates under its own UK licence and terms, so signing up at one doesn’t carry over anything from your Casumo account, including deposit limits, self-exclusion status, or loyalty progress. Treat each one as a fresh decision rather than an extension of Casumo itself.

None of this list should be read as an endorsement over another; it simply reflects what independent reviewers most commonly compare against Casumo when a confirmed sister site isn’t available.

Bonus eligibility and features across Casumo and comparable brands

Bonus eligibility is one of the most misunderstood parts of any “sister sites” search. Casumo’s own welcome offer is only available to new customers opening a fresh Casumo account, and it can’t be transferred, combined with, or claimed again through a different brand, even one that’s genuinely part of the same corporate family elsewhere in the market.

Where a UK operator does run several confirmed sister brands under one licence, it’s standard practice to restrict new-customer bonuses to one per person, household or verified payment method, checked through the same identity and address verification used for standard KYC. Since Casumo currently has no confirmed UK sister site, this specific restriction is less relevant to Casumo itself, but it’s worth understanding because several of the comparison-only brands below do operate as part of larger, confirmed licence groups.

The table below sets out how Casumo compares with the comparison options most commonly suggested in place of a genuine sister site.

Wagering requirements, game weighting rules and maximum bet limits vary between every brand in that table, including the ones with no confirmed link to Casumo at all, so it’s never safe to assume one operator’s terms mirror another’s. Our bonus terms guide explains the common conditions attached to UK casino welcome offers in more detail, which is worth reading before opting into any promotion, Casumo’s included.

If a confirmed sister site for Casumo does emerge in future, expect the same principle to apply: one welcome bonus per verified customer, with the rest of the family’s promotions available separately once you’ve completed any KYC checks that specific brand requires.

Account checks, KYC and safer gambling controls when comparing casinos

Because Casumo doesn’t currently share a confirmed UK licence with another brand, opening an account at any of the comparison options listed above means starting from scratch with a completely separate set of checks. Expect to submit fresh identity documents, proof of address, and payment verification, exactly as you would have done when you first joined Casumo.

It’s important to be clear that self-exclusion doesn’t work the way some “sister site” myths suggest. UK-wide self-exclusion scheme, the UK’s national self-exclusion scheme, covers every operator licensed by the UK Gambling Commission, not just a single brand or its confirmed family members. If you’ve self-excluded, that exclusion applies across Casumo, every comparison option mentioned on this page, and any other UKGC-licensed casino, with no way to bypass it by moving to a similarly branded site.

Deposit limits, time-outs and reality checks are typically set per account rather than shared across brands, even within genuine sister-site families in other parts of the market. That means adjusting your limits at Casumo has no effect on an account you open elsewhere, and each brand’s tools need to be configured individually if you want consistent protection across every site you use.

Before comparing Casumo against any comparison option, it’s worth working through a short checklist so you’re not caught out by account requirements partway through signing up.

• Confirm the comparison option brand’s current UK Gambling Commission licence status rather than assuming it from a review site.
• Check that your UK-wide self-exclusion registration, if applicable, is active and understood before attempting to register anywhere new.
• Have photo ID and a recent proof of address ready, since most UK operators verify these within days of signing up.
• Review each brand’s deposit limit and time-out settings separately, rather than assuming your Casumo preferences carry over.
• Read the affordability check policy for any brand you’re considering, particularly if you plan to deposit larger amounts.

Our responsible gambling page goes into more detail on how these tools work across UK-licensed operators generally, and it’s worth reading alongside our bonus terms guide if you’re planning to claim a welcome offer at a new brand at the same time as setting up your account.

A step-by-step way to compare Casumo with its listed comparison options

Given that Casumo doesn’t have a confirmed UK sister site at the moment, a structured comparison process is more useful than searching for a family of brands that may not exist yet. The steps below reflect how we’d approach the decision ourselves, working from confirmed facts outward rather than starting with assumptions.

1. Verify Casumo’s current licence details directly against the UK Gambling Commission’s public register, rather than relying on any single review site, including this one.
2. Decide whether you’re specifically looking for a confirmed sister brand or are open to a well-matched comparison-only brand, since those two searches lead to different results and different expectations.
3. Shortlist two or three comparison options from the brands covered earlier in this guide, based on whichever feature matters most to you, such as live casino depth, mobile app quality, or bonus structure.
4. Read the bonus terms for each shortlisted brand carefully before opting in anywhere, paying close attention to wagering requirements, game weighting and expiry windows.
5. Check each brand’s responsible gambling tools individually, and confirm your self-exclusion status is what you expect it to be before registering somewhere new.
6. Compare independent ratings and research rather than relying purely on marketing claims from the casino itself.
7. Make your final decision based on confirmed facts rather than unverified “sister site” claims, and keep a note of which licensee you actually signed up with in case you need it later.

Casino ownership structures do change, sometimes quickly, so it’s worth treating today’s picture as a snapshot rather than a permanent state of affairs. If Casumo’s UK licensing arrangement changes in future, or a genuine sister brand does launch here, that’s the kind of update we’d expect to reflect on our homepage and across the wider site as soon as it’s confirmed.