Kwiff Sister Sites

Short answer: yes, Kwiff has a couple of related brands, and no, it is not the "unlicensed offshore casino" that some sister-site pages make it out to be. For players in Britain, Kwiff runs on a UK Gambling Commission licence held by its parent company, Eaton Gate Gaming Limited (account 44448). Kwiff does operate separate international versions under offshore licences, but those explicitly block UK players — so the version a UK resident can actually use is the regulated one.

That distinction matters, because a lot of affiliate "similar casino" lists lump Kwiff in with genuinely offshore brands. We went to the operator's own terms and the Commission's public register rather than repeating those lists, and the picture below is drawn from those primary sources.

Who actually runs Kwiff

The ownership sits in layers, so a flat "Kwiff is owned by X" would be misleading:

• The brand entity is Kwiff Ltd, a Malta-registered company, named as "Kwiff" throughout the operator's own terms and conditions.
• The UK operating company is its parent, Eaton Gate Gaming Limited — registered in England & Wales, company number 09526212, status active, incorporated in 2015.
• The UK licence is held by Eaton Gate Gaming, not by the Malta brand company. Its Commission account, 44448, shows a full set of active permissions: a remote casino licence (since December 2016), remote betting (since March 2016), gambling software, and virtual-event betting (added 2023). "kwiff" is the single registered trading name on that account.

So when you play Kwiff from the UK, you are using a service that answers to the Gambling Commission through Eaton Gate Gaming. That is a genuine consumer protection, and it is the opposite of an unregulated offshore set-up.

What is verifiable — and what isn't

We only print numbers we can stand up on the issuing register:

• Verified: the UKGC account (44448) on the Commission's register, and the parent company number (09526212) on Companies House. Both are linked above.
• Not independently verified: the reg numbers Kwiff quotes for its Malta, Curaçao and Isle of Man entities. These appear in Kwiff's own legal pages, but we have not confirmed them on the Maltese, Curaçao or Manx registers, so we describe those arms in words rather than repeating numbers we can't check. If a page tells you Kwiff's "real" licence number and it isn't 44448 on the UK register, treat it with caution.

Kwiff's international footprint is real but walled off from Britain. Its Rest-of-World terms put the operation under a Curaçao licence (through a company called EWW Gaming B.V.) and list the United Kingdom as a prohibited territory. A separate Isle of Man company, Worldwide Gaming Limited, covers other markets. None of these accept UK residents — the offshore Kwiff is simply not a route open to you, and trying to disguise your location to reach it breaches their own rules.

Kwiff's real sister brands

Under the same UK licence account (44448), the register lists more than one casino domain. That is the honest basis for calling something a Kwiff "sister" — shared operator, shared licence — rather than a marketing guess. The verifiable ones:

Note the register carries only one trading name ("kwiff"), so GRP Casino and Slotsking are related domains under one operator rather than a large branded network. If you see Kwiff described as part of a sprawling family of a dozen casinos, that is affiliate embellishment, not what the licence shows.

What a UK player should actually watch for

Because the UK Kwiff is licensed here, the usual "no protections at all" warnings that apply to offshore casinos don't apply to it. The honest risk list is different:

• Make sure you're on the UK-licensed site. The single biggest trap is landing on an international Kwiff (or an offshore look-alike) that isn't covered by the UK licence. Only the UK service gives you UK protections; the offshore versions don't — and they bar UK players anyway.
• You do get a UK complaints route. As a Commission licensee, Kwiff must offer alternative dispute resolution (ADR) if you can't settle a complaint directly — something a genuinely offshore casino cannot give a UK player.
• The national online self-exclusion scheme covers it. Because Kwiff is UKGC-licensed, registering with the national online self-exclusion scheme does block it, along with every other UK-licensed operator. (That is exactly what fails with a real offshore casino, which sits outside the scheme.)
• Deposit limits are per account. Any limit you set applies to your Kwiff account only; it does not automatically follow you to GRP Casino or any other brand. Set limits everywhere you play.
• Read the bonus terms on the day. Wagering requirements, game weightings and maximum-bet rules change, and UK rules cap incentive wagering; we don't quote a live offer here because promotions move — check the current terms before opting in.

On track record: the Commission's public register currently shows no active regulatory sanctions against Eaton Gate Gaming. Industry coverage has referred to an earlier settlement over anti-money-laundering and safer-gambling failings, but that entry is no longer on the live register and we could not re-verify its figures on a primary source, so we don't state any here.

Our verdict

Kwiff is an unusual case for a "sister sites" query: the version UK players can use is itself UK Gambling Commission-licensed, which already places it in the safer, regulated bracket rather than the offshore one. Its genuine siblings — GRP Casino and the apparently dormant Slotsking — sit under the same UK licence, so there is no hidden offshore network to worry about here. The one thing to avoid is a Kwiff page that isn't the UK-licensed service: an international or copycat version gives a UK player none of the above protections and shouldn't be used. Whichever UK-licensed site you choose, treat gambling as entertainment you can afford to lose, set your deposit and time limits up front, and if it stops being fun, step back. Free, confidential help is available from GamCare on the National Gambling Helpline, 0808 8020 133. 18+.