Slot Boss Sister Sites
The short answer
Slot Boss is operated by LeoVegas Gaming PLC on Gambling Commission account 39198. The Slot Boss sister sites — 5 other UK brands on that same licence — are 21, BetMGM, BetUK, LeoVegas and Pink Casino.
Verified licence record
39198
LeoVegas Gaming PLC · LeoVegas Group network
Check on the public registerLicence family · LeoVegas Gaming PLC
Every Slot Boss sister site on licence 39198
| Sister brand | Licence account | Network | Launched | |
|---|---|---|---|---|
| 39198 | LeoVegas Group | — | ||
| 39198 | LeoVegas Group | — | ||
| 39198 | LeoVegas Group | — | ||
| 39198 | LeoVegas Group | — | ||
| 39198 | LeoVegas Group | — |
How the group is structured
LeoVegas Gaming PLC holds account 39198 and trades under 6 names in the UK. Slot Boss is one of them; 21, BetMGM, BetUK, LeoVegas and Pink Casino are the others. To the Gambling Commission that is one licensee with one set of licence conditions, however many separate websites the customer sees.
Commercially the group sits inside the LeoVegas Group network, so you will often see these brands described together in industry coverage even where the licence record is what actually ties them.
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.
What Slot Boss actually looks like
What follows is Slot Boss as it was when we captured it, in September 2026. Operators redesign and rewrite offers constantly, so treat every figure below as dated evidence rather than a current price list — the licence record above is the part that does not move.

Slot Boss on a phone
Worth its own look, because it is how most people will actually see the site. The mobile build is not a shrunken desktop: the top navigation collapses to a hamburger and an icon rail takes its place, which changes what gets promoted. Anything the operator chooses to keep in that rail is what it most wants a phone user to tap.

The detail worth checking on any mobile build is whether the offer terms survive the squeeze. On a phone the qualifying line is the first thing a designer is tempted to push behind a tap, and once it is behind a tap most people never read it.
How Slot Boss 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 Slot Boss safe?
Slot Boss 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 Slot Boss as a trading name. It takes about thirty seconds and it is the only source that cannot be marketed at you.


How uniform is this group?
Unusually so. All 6 brands on account 39198 share a single registration — none of them holds a separate licence account, and none is listed under a different network. For a player that means the licence-level protections, the complaints route and the self-exclusion all behave identically whichever of the 6 you sign up to. What still differs is set per brand: the lobby, the welcome offer and the cashier.
Sites like Slot Boss
The closest alternatives are not a hand-picked list — they are the brands that share Slot Boss's licence. Same operator, same licence conditions, same complaints route, different site.
GAMSTOP and self-exclusion
Because Slot Boss is licensed by the Gambling Commission, a GAMSTOP self-exclusion blocks it. It also blocks every other brand on account 39198 — 21, BetMGM, BetUK, LeoVegas and Pink Casino — 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 Slot Boss
Is this a Slot Boss 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 Slot Boss, every other brand on the same account, and what the site itself looked like when we captured it in September 2026. 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 Slot Boss have?
5, on Gambling Commission account 39198: 21, BetMGM, BetUK, LeoVegas and Pink Casino.
Who owns Slot Boss?
Slot Boss is operated by LeoVegas Gaming PLC, part of the LeoVegas Group network. The licensee is listed on Gambling Commission account 39198.
Is Slot Boss 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 Slot Boss and its sister sites?
Yes. One GAMSTOP registration blocks Slot Boss and all 5 sister brands, plus every other UK-licensed site.
Can I claim the welcome bonus at Slot Boss 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 Slot Boss, 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.
