- Sister casinos are brands run by the same operating company, usually on the same licence.
- A shared design or game library only shows a shared supplier. The company and licence in the footer show a real connection.
- Accounts, balances and verification stay separate, but welcome bonus rules often apply across every brand in a group.
"Sister sites" are casino brands connected through the company behind them. The label is used loosely, for anything from 2 brands run by one company on one licence to 2 unrelated sites that happen to use the same software, and those relationships have very different consequences for a player. This guide explains the difference, shows how to check a connection yourself, and uses the networks we have researched to show what a shared owner changes and what it does not.
The short version is that ownership sits in the footer, not in the design. A shared operator and licence reference is strong evidence of a real connection. A shared lobby, cashier or game library is evidence only of a shared supplier.
What are sister casinos?
Sister casinos are brands operated by the same company, usually on the same licence. The company holds the licence and your account, sets the terms and answers complaints. The brand is the name, design and marketing layered on top.
One company running several brands is ordinary. On the Gambling Commission's register, L&L Europe Limited holds a single remote casino licence and lists 8 active domains, including casinocasino.com, funcasino.com, hypercasino.com and pubcasino.co.uk. Offshore, our research found 5 brands, Velobet, Rolletto, Goldenbet, Cosmobet and Zizobet, all naming Santeda International B.V. and the same Curaçao licence in their company details in September 2026.
Four ways two casinos can be connected
The phrase "sister site" covers 4 different relationships. They are listed here from the strongest link to the weakest, with what each one means for your account.
| Connection | What is shared | Who answers for your account | What it tells you |
|---|---|---|---|
| Same operating company | Company, licence, terms, often the platform | The same company for every brand | A true sister site |
| White label | The licence holder's licence and usually its platform | The licence holder, not the brand owner | Legally linked, owned separately |
| Same platform supplier | Software, lobby design, cashier flow | Different companies | Looks linked, is not |
| Same game studios | Game titles | Different companies | No corporate link at all |
White labels deserve a closer look because they confuse the picture most. A licensed company runs the gambling for brands owned and marketed by other businesses. The Gambling Commission's position is that the licence holder is always the party offering the gambling, that the white-label partner is closer to a marketing partner, and that responsibility for every white-label site sits with the licence holder and cannot be transferred.
Platform suppliers sell the white-label model openly. ProgressPlay describes its package as including licensing, localisation, finance, player support and retention, and the Gambling Commission's register listed 95 domains tagged "White label" under ProgressPlay Limited's account when we checked on 28 September 2026. A supplier's white-label blog put it simply: the brand "operates under the provider's license".
What a shared owner changes
The operator, not the brand, sets the rules that follow you from site to site. Two of them matter more than any bonus figure.
Bonus eligibility. Groups commonly allow one welcome offer per household. The terms of Velobet, Rolletto, Cosmobet, Goldenbet and Zizobet allow no more than one of each bonus per user, IP address, device, family, residential address, telephone number, card, payment account and email address, and MyStake's terms use the same wording. If you have already taken the welcome at one brand, the recurring terms at the others are the fair comparison.
Complaints and account decisions. A complaint goes to the company named in the footer. MyStake and Donbet name GTW B.V., while the 5 brands above name Santeda, so a dispute with MyStake goes to a different company from one with Rolletto, even though the sites share a platform.
What stays separate
Shared ownership does not merge your accounts. In the networks we researched, each brand was a separate site with its own registration, balance and identity checks.
Logins. There is no shared login. Joining a sister site means registering again.
Balances. Money sits with each account and is not pooled across brands.
Verification. We could not establish whether documents accepted at one brand are recognised at another, so treat each site as a fresh check, and complete it before you need to withdraw.
Self-exclusion. An exclusion you set with one brand should not be assumed to reach the others. We found nothing in the offshore terms we read that extends it, and the only way to block every British-licensed site at once is GAMSTOP.
Why so many casinos look the same
Most casinos buy a complete platform rather than building one, so the same lobby grid, search, cashier and game catalogue appear across many brands. The 7 brands in our research all run on the Upgaming platform and share a catalogue of roughly 8,000 games, which is why affiliate lists often present them as one family.
The design test fails in both directions. MyStake and Donbet look like Velobet but are operated by a different company. A single company can equally run brands that look nothing alike, because a new theme is cheap to build and reaches a different audience. Cosmobet's space theme, for example, sits on the same operator, licence and platform as Velobet's lobby.
How to check a connection
- Read the footer or company details page
Record the legal company name, its registration number and the licence reference. A British licensee must show its Gambling Commission account number and a link to its register entry on every gambling screen. - Compare the two brands
The same company and the same licence reference mean one licensee answers for both. Different ones mean they do not, whatever else they share. - Check the regulator's register
For a British licence, search the Commission's register and read the domain names tab, which lists every site the licensee has declared, including white labels. For Curaçao, check the authority's licence registry and the seal, which must link to cert.cga.cw and show the exact domain you are on. Our licence guide covers both in detail. - Note the date
Brands change hands and footers change. A connection that held last year may not hold today, so record when you checked.
This test confirms a shared licensee. It does not map everything above it: holding companies, shared directors and group ownership do not appear in a footer, and a shared licensee can mean common ownership or a white label. Read a match as strong evidence of a direct link, not a complete picture of who owns what.
A worked example: the Santeda and GTW brands
The offshore network behind Velobet shows why the footer test matters. The table below summarises what we found in September 2026; each brand has its own guide with the full terms.
| Brand | Operator in the footer | Licence | Welcome, as published |
|---|---|---|---|
| Velobet | Santeda International B.V. | OGL/2024/1798/1048 | 3 deposits, 30x deposit plus bonus, 30 days |
| Rolletto | Santeda International B.V. | OGL/2024/1798/1048 | Up to €5,500, 40x deposit plus bonus, 5 days |
| Cosmobet | Santeda International B.V. | OGL/2024/1798/1048 | 4 x 100% up to €500, 30x deposit plus bonus, 7 days |
| Zizobet | Santeda International B.V. | OGL/2024/1798/1048 | 550% up to €5,300, wagering not documented |
| Goldenbet | Santeda International B.V. | OGL/2024/1798/1048 | No casino welcome listed; 10% cashback up to €500 |
| MyStake | GTW B.V. | OGL/2024/250/0115 | 300% up to €1,500, 30x deposit plus bonus, 30 days |
| Donbet | GTW B.V. | OGL/2024/250/0115 | 150% up to €750, wagering not established |
The shared terms are as telling as the shared licence. Velobet, Rolletto, Cosmobet and Zizobet all cap withdrawable winnings from a deposit bonus at 10 times the qualifying deposit, and the published terms of the Santeda brands and MyStake set the same €7,500 weekly and €15,000 monthly withdrawal limits. Affiliate material that presents these as separate casinos is describing one company's terms several times.
The same example shows the limits of a footer. In the Curaçao Gaming Authority's registry dated 21 September 2026, both licences show an expiry date of 24 December 2025 and a status of "Assessment in progress". In May 2026, trade press reported that both Santeda International B.V. and GTW B.V. had been dissolved, while the sites kept trading. None of the 7 holds a Gambling Commission licence, so none is authorised to take bets from people in Great Britain.
Sister sites and self-exclusion
Self-exclusion works at 2 levels. An exclusion set with an operator covers that operator, and the Gambling Commission requires a British licensee to close the self-excluded customer's accounts and return the money in them. Its guidance also encourages operators to suggest extending the exclusion to other operators the customer uses.
GAMSTOP covers every online operator licensed in Great Britain, since participation became a licence condition on 31 March 2020. It offers exclusions of 6 months, 1 year or 5 years, and it cannot be ended early. It does not reach sites licensed only elsewhere, including every brand in the example above.
Worth remembering
If you have excluded yourself through GAMSTOP, an offshore sister site sits outside the protection you chose, and the exclusion exists for a reason. Free, confidential support is available from GamCare and the National Gambling Helpline on 0808 8020 133, and our safer play page lists more.
Common questions
What is a casino sister site?
Usually a brand run by the same company, on the same licence, as another brand. The term is also used loosely for sites that only share software, which is a much weaker link.
How do I find out if two casinos are sister sites?
Compare the company name and licence reference in each site's footer or company details page. The same company and licence mean one licensee answers for both.
Can I use one login across sister casinos?
No, in the networks we researched. Each brand had its own registration, balance and identity checks.
Can I claim a welcome bonus at every sister site?
Usually not. The groups we researched limit bonuses to one per household, IP address, device and payment method across their brands.
What is a white-label casino?
A brand owned by one business but run under another company's licence. The licence holder remains responsible for the site and the gambling on it.
Why do so many casinos look identical?
Most buy a complete platform from a small number of suppliers. A shared design points to a shared supplier, not necessarily a shared owner.
Does self-exclusion on one brand cover its sister sites?
Do not assume so. The reliable way to block every British-licensed site at once is GAMSTOP, which does not cover offshore sites.
Are sister sites of a licensed casino also licensed?
Only if the licence covers them. Check each domain on the regulator's register, because a similar brand can sit under a different company and licence.