Kwiff Sister Sites

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Kwiff is a UK-licensed sportsbook and casino operated by Eaton Gate Gaming Limited. It holds a UKGC licence under account 44448. Evidence confirms one true sister site — GRP Casino — under the same operator licence. This guide covers that confirmed brand and a curated selection of comparable UK-licensed alternatives for players seeking similar experiences.

Operated by Eaton Gate Gaming Limited (parent company); Kwiff Limited (operating agent) · Last reviewed: 2026-08-01

Kwiff is a UK-licensed sportsbook and casino operated by Eaton Gate Gaming Limited. It holds a UKGC licence under account 44448. Evidence confirms one true sister site — GRP Casino — under the same operator licence. This guide covers that confirmed brand and a curated selection of comparable UK-licensed alternatives for players seeking similar experiences.

Compare related sister sites and operator networks

Start with genuine operator and sister-brand relationships where SisterIndex has them, then continue through clearly labelled comparison pages. A comparison link is a research route and does not automatically mean two brands share the same operator.

Confirmed Kwiff sister sites and related brands

Site NameLicenceVisit
BoyleSports Dual Visit BoyleSports
GRP Casino UKGC Visit GRP Casino
Betfred UKGC Visit Betfred
10bet UKGC Visit 10bet
Unibet UKGC Visit Unibet

How We Identify Sister Sites

We identified the operator behind Kwiff by cross-referencing multiple independent review platforms (including GamCheck, SisterSitesGuru, TheSisterSite, BettingLounge, Racing Post, and Football Ground Guide), all of which confirm Eaton Gate Gaming Limited as the parent operator and UKGC account 44448 as the relevant licence. We then searched specifically for other brands operating under the same Eaton Gate Gaming UKGC licence. Multiple independent sources, including thesistersite.co.uk and sistersitesguru.co.uk, confirm GRP Casino (grpcasino.com) as the only currently active brand sharing account 44448 with Kwiff, making it the sole true sister site. Alternative sites were included based on consistent citation by UK comparison platforms as comparable experiences for Kwiff users. No licence numbers were stated without primary-source verification. The £588,000 UKGC regulatory fine issued in 2022 was noted in evidence.

About the author

Jonathan Ridehalgh, Senior Casino Analyst at SisterIndex. Jonathan reviews operator networks, licence structures, sister-site evidence, and account-level details that help readers understand whether casino brands are genuinely connected.

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Frequently Asked Questions

Yes, but only one. GRP Casino (grpcasino.com) is the sole confirmed sister site of Kwiff as of mid-2026. It operates under the same Eaton Gate Gaming Limited UKGC licence account (44448) and is a casino-only brand. Several other sites are sometimes listed as Kwiff sister sites by third-party pages, but those brands are operated by entirely different companies and are more accurately described as alternatives rather than true sister sites.

Kwiff is operated by Kwiff Limited, which is a wholly-owned subsidiary of Eaton Gate Gaming Limited. The UKGC licence sits with Eaton Gate Gaming under account number 44448, with Kwiff Limited acting as the named agent authorised to provide gambling facilities under that licence. Kwiff Limited's registered office is located in Malta. Eaton Gate Gaming Limited is registered in England and Wales.

Yes. Kwiff holds a full licence from the UK Gambling Commission under account 44448, which covers remote casino games, sports betting, and betting software. The platform uses SSL encryption to protect player data and is independently audited for fairness by eCOGRA. It also integrates with GamStop, the national self-exclusion scheme. Players should be aware that Kwiff received a UKGC regulatory fine of £588,000 in 2022 for social responsibility and anti-money laundering failings, which is a matter of public record.

As of mid-2026, Kwiff's casino welcome offer requires new players to wager £20 in cash on slots within five days of their first deposit to receive 200 free spins on Book of Dead. Each free spin is worth £0.10, giving a maximum spin value of £20. Winnings from the free spins carry no wagering requirements, but a maximum withdrawal cap of £250 applies to bonus winnings. E-wallets and virtual cards are excluded from qualifying for the offer. Always verify current terms directly on Kwiff's website before depositing, as promotional terms are subject to change.

If you self-exclude via GamStop — the UK national self-exclusion scheme — that exclusion applies to all UKGC-licensed gambling sites, including both Kwiff and GRP Casino. If you use Kwiff's own site-level self-exclusion tool, you should contact GRP Casino separately or use GamStop to ensure your exclusion covers all Eaton Gate Gaming brands. GamStop is the most comprehensive option for UK players wishing to self-exclude across multiple sites simultaneously. You can register at gamstop.co.uk free of charge.