Monster Casino Sister Sites

Short answer: yes, Monster Casino has a large family of sister sites, and they all trace back to one company, ProgressPlay Limited. But the premise behind most write-ups framing Monster as outside the national online self-exclusion scheme is wrong: Monster is not an offshore, unlicensed casino. Its operator holds a live UK Gambling Commission licence, and monstercasino.com is listed on the Commission’s own public register. Monster is a white-label brand running on ProgressPlay’s UK and Malta licences, which changes what “sister site” means here, and who you are really trusting.

We flag this plainly because you may have arrived expecting an offshore, no-UK-protection story. On the evidence, that framing does not hold for this brand, so this page corrects the record rather than repeating it.

Who actually runs Monster Casino

The name on the licence, and in Monster’s own footer, is ProgressPlay Limited, a Malta-registered company with a head office in Limassol, Cyprus. It has held a UK Gambling Commission licence since its casino permission went live on 1 November 2014, under account number 39335, later adding general betting (2018) and bingo (2024). ProgressPlay also states a Malta Gaming Authority licence on its footer.

The nuance that matters: Monster does not hold its own licence. It is one of roughly 190 brands on ProgressPlay’s account, and monstercasino.com sits specifically in the white-label section of the Commission’s domain list. In plain terms, a partner runs the Monster shopfront while ProgressPlay holds the licence, the platform and, crucially, your account and your money. So “is Monster safe?” is really “do you trust ProgressPlay?” On what is actually verifiable: the UK licence is real and current on the register; the Malta licence number we could see only on Monster’s own footer, not independently on the MGA register, so treat that one as “check it yourself” rather than a confirmed fact.

Monster’s real sister sites

Because every ProgressPlay brand runs on the same licence and platform, its stablemates are genuine sisters, same operator, same terms engine, same account rules, not the loose “similar casino” lists that affiliate pages pad with. Every brand below appears under account 39335 on the Gambling Commission’s register:

That is a sample, not the full list: the register carries well over a hundred live and inactive domains under this single account. The point is not the individual names but the shape of it. Move between any of these and you have changed the logo, the colours and the welcome page, but not the operator behind the counter.

What a ProgressPlay white-label means for you

One operator, one welcome

ProgressPlay’s terms restrict claiming a fresh welcome offer across its brands, so registering at Monster and then Glimmer or Yoko does not reset the new-player perks the way two unrelated casinos would. Read each brand’s current bonus terms rather than assuming the next sister is a clean slate. We are deliberately not quoting a headline bonus figure here, because offers on these brands change often and a stale number is worse than none.

The operator’s compliance record

This is the due-diligence point that outweighs any promotion. In August 2025 the Gambling Commission imposed a £1,000,000 penalty on ProgressPlay, with a formal warning and a licence condition requiring an independent third-party audit, after finding anti-money-laundering and social-responsibility failings dating from 2021 to 2024. It was the operator’s second action; it paid £175,718 in 2022 for similar issues. Read that for what it is, a point-in-time regulatory finding with agreed remediation, not a verdict on how the site treats you today, but a real signal about the company standing behind all these brands. The action is recorded on its register entry and was widely reported (details here).

Self-exclusion and limits

Because Monster runs on a UK licence, it sits inside the national online self-exclusion scheme: registering with that scheme blocks every UK-licensed operator at once, ProgressPlay’s brands included. And because these brands share one operator account system, a limit or exclusion set with ProgressPlay generally reaches across the family rather than stopping at one logo, though you should confirm the exact scope in the current terms. Deposit limits themselves are set per account.

The honest verdict

Monster is a legitimate, UK-licensed casino, not the offshore, protection-free option some lists imply. That licence is the thing that counts: it gives you the UK complaints and independent dispute-resolution route, the Commission’s rules on how customer funds are handled, and coverage by the national self-exclusion scheme. So the real decision is not “offshore versus safe.” It is whether you are comfortable being one of around 190 near-identical brands on a single operator’s licence, an operator with a recent and sizeable enforcement record, knowing a new welcome offer will not stack across the family. If you would rather not put your money behind a large multi-brand white-label network, a genuine standalone UK casino, or one run by a different operator with a cleaner recent record, is the more conservative choice. Either way, judge it on the operator, ProgressPlay, not on the monster mascot.

18+ · Play responsibly. If gambling stops being fun, the National Gambling Helpline is free and confidential on 0808 8020 133 (GamCare). The national online self-exclusion scheme lets you block every UK-licensed operator in one step.