21 Sister Sites
The short answer
21 is operated by LeoVegas Gaming PLC on Gambling Commission account 39198. The 21 sister sites — 5 other UK brands on that same licence — are BetMGM, BetUK, LeoVegas, Pink Casino and Slot Boss.
Licence family · LeoVegas Gaming PLC
Every 21 sister site on licence 39198
| Sister brand | Licence account | Network | Launched | |
|---|---|---|---|---|
 BetMGM | 39198 | LeoVegas Group | — | |
 BetUK | 39198 | — | — | |
 LeoVegas | 39198 | LeoVegas Group | — | |
 Pink Casino | 39198 | — | — | |
 Slot Boss | 39198 | LeoVegas Group | — |
How the group is structured
LeoVegas Gaming PLC holds account 39198 and trades under 6 names in the UK. 21 is one of them; BetMGM, BetUK, LeoVegas, Pink Casino and Slot Boss are the others. To the Gambling Commission that is one licensee with one set of licence conditions, however many separate websites the customer sees.
This matters in one practical way: a decision made about your account at one of these 6 brands is made by the same company that runs the rest. Verification checks, source-of-funds requests and account restrictions are commonly applied across a licence rather than per brand.
How 21 compares to its sister sites
All 6 brands on account 39198 answer to the same licensee, so the things set at licence level — complaints routing, funds protection, self-exclusion — are identical across them. What differs is set per brand: the welcome offer, the lobby, the payment methods on the cashier and the look of the site.
Is 21 safe?
21 holds a current Gambling Commission licence under account 39198. That is the part you can verify yourself, and it is the part that matters: a UK licence brings segregated customer funds, a named alternative dispute resolution route, mandatory age verification and GAMSTOP participation.
What a licence does not tell you is how the operator behaves — how fast withdrawals clear, how it handles a disputed bonus, how heavy the verification is. That is worth reading reviews for. What we publish here is the record, not a score.
To check it yourself: open the Gambling Commission public register, search LeoVegas Gaming PLC, and confirm account 39198 lists 21 as a trading name. It takes about thirty seconds and it is the only source that cannot be marketed at you.
Where the sister sites differ
All 6 brands answer to LeoVegas Gaming PLC, so the licence-level protections are identical. These are the ones with something of their own worth knowing.
BetMGM is listed under the LeoVegas Group network.
LeoVegas is listed under the LeoVegas Group network.
Slot Boss is listed under the LeoVegas Group network.
Sites like 21
The closest alternatives are not a hand-picked list — they are the brands that share 21's licence. Same operator, same licence conditions, same complaints route, different site.
GAMSTOP and self-exclusion
Because 21 is licensed by the Gambling Commission, a GAMSTOP self-exclusion blocks it. It also blocks every other brand on account 39198 — BetMGM, BetUK, LeoVegas, Pink Casino and Slot Boss — and every other UK-licensed gambling site, in one registration.
This is the reason the "sister site" question matters to people who have self-excluded. You cannot get round GAMSTOP by moving to a sibling brand, and any site advertising itself as outside GAMSTOP is not UK-licensed. We do not list those, and we do not link to them.
If gambling is causing you harm, the National Gambling Helpline is free on 0808 8020 133, 24 hours a day.
Questions about 21
Is this a 21 review?
Not in the usual sense. There is no score, no star rating and no ranking here, because we hold no data that would justify one. What this page is: the Gambling Commission licence record for 21, every other brand on the same account, and how to verify all of it yourself in about a minute. If you want an opinion on whether the games pay or the support is quick, read an actual review site — and check this page first to see which other brands that opinion quietly also applies to.
How many sister sites does 21 have?
5, on Gambling Commission account 39198: BetMGM, BetUK, LeoVegas, Pink Casino and Slot Boss.
Who owns 21?
21 is operated by LeoVegas Gaming PLC. The licensee is listed on Gambling Commission account 39198.
Is 21 licensed in the UK?
Yes — account 39198 on the Gambling Commission register. We recheck every account on this site monthly; this one was last confirmed in September 2026.
Does GAMSTOP cover 21 and its sister sites?
Yes. One GAMSTOP registration blocks 21 and all 5 sister brands, plus every other UK-licensed site.
Can I claim the welcome bonus at 21 and its sister sites?
Usually not. Operators normally write the welcome offer as one per customer across the whole licence, so claiming at several brands on account 39198 tends to breach the bonus terms rather than double your money.
If my account is closed at 21, can I use a sister site?
Often not. Account decisions are made by the licensee, not the brand, so a closure or restriction on account 39198 is commonly applied across every brand on it.
