Casino Kings sister sites in a nutshell
Casino Kings is a UK-licensed casino and sportsbook run by ProgressPlay Limited on Gambling Commission account 39335, and that licence is one of the busiest in British gambling: 179 domains sit on it, 101 of them white-label brands like Casino Kings itself, 19 run by ProgressPlay as its own, and 59 now inactive. The sister sites worth knowing include Casimpo, Casino Palace, UK Slots, Yoko Casino and Fruity King, all live on the same licence and the same platform.
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At a glance
Brand reviewed
Casino Kings (casinokings.com)
Operator
ProgressPlay Limited (Malta, C58305)
UKGC licence
39335 (also Malta MGA licensed)
Network
179 domains on the licence: 101 white-labels, 19 own-brand, 59 inactive
Product
Casino, live casino and sportsbook, plus an iOS app
Welcome offer
Deposit £20, get 100 free spins (10x, £30 cap)
Funds protection
Not protected (basic tier, segregated accounts)
Last checked
10 July 2026
The Casino Kings sister sites
Every brand below shares Casino Kings’s machinery, and the tells are hiding in plain sight. Each site’s lobby runs on ProgressPlay’s platform, the support email at every brand is the same shared instantgamesupport.com address, and the small print carries an identical line: the welcome offer is “limited to 5 brands within the network”. That last one matters more than it looks, because with 101 white-label brands live on this licence, a bonus hunter can’t graze across the family; five claims and the door shuts. What separates the brands is the front end: the size and shape of the welcome, the domain on the door, and how much personality the skin bothers with. The five below are my picks from the list, chosen to show the operator’s range; the other ninety-odd live white-labels are variations on these themes, and I’d assess any of them by exactly the same checklist.
Casimpo
- The spins specialist: Its welcome leads with 125 free spins, the biggest spin count in this comparison, opening with 50 on Book of Dead.
- Status: A white-label on the ProgressPlay licence, the same arrangement as Casino Kings itself.
- On the front page: A live jackpot ticker running into eight figures, which gives the lobby a pulse.
- Same fine print: The five-brand welcome limit and the shared cashier apply here exactly as at Casino Kings.
- Who it suits: A player who counts a welcome in spins rather than match percentage.
Casino Palace
- The royal cousin: Where Casino Kings wears the crown, Casino Palace claims the throne room, and it backs the branding with a 100% match up to £200.
- Richer promo shelf: Deposit-code free spins and a separate 75-spin offer sit alongside the match, more variety than Casino Kings’s single spins deal.
- Status: Another white-label on licence 39335, on the identical platform.
- Worth knowing: Its promotions carry the same real-balance-first wagering structure, so read the route to cashing out before chasing the bigger number.
- Who it suits: Anyone who wants a proper deposit match rather than Casino Kings’s spins-only start.
UK Slots
- The house brand: One of the 19 domains ProgressPlay runs as its own rather than renting out, sitting on the kind of exact-match domain money can’t usually buy.
- Welcome: A 100% match up to £200 plus 25 free spins on Book of Dead.
- Identity: Does what the domain says, a slots-first room with no pretence of a theme.
- Network position: A core brand of the estate rather than a tenant, which makes it the closest thing to ProgressPlay’s shop window.
- Who it suits: Slots players who’d rather deal with the landlord than a tenant brand.
Yoko Casino
- The low door: Its 100% match up to £200 with 30 Book of Dead spins opens from a £10 deposit, half the entry price of Casino Kings’s welcome.
- Status: Another of ProgressPlay’s own active domains, not a white-label tenant.
- Familiar shelf: The same code-based spin promotions turn up here as at Casino Palace, one script across the network.
- The trade-off: A softer entry point on the same 10x, capped-conversion bonus maths as everywhere else on the licence.
- Who it suits: A cautious first-timer who wants to test the platform for a tenner.
Fruity King
- The other King: A fruit-machine take on the royal branding, with a 100% match up to £100 plus 50 spins on Rainbow Riches Megaways.
- Two-sided: A bet-£10-get-£10 free bet runs on its sportsbook side, claimed separately from the casino welcome as UK rules require.
- Status: A white-label on the same licence, with the UKGC account number quoted right in its own site copy.
- Personality: More of an identity than most of the network manages, even if the machinery underneath is standard-issue.
- Who it suits: A player who wants slots and a flutter on the football under one roof, with a bit of colour.
How this review was made
A plain record of who checked what, when and how, so you can judge the page on its evidence. Our full approach is on the About Us page.
Written by: Rob Hill
Research method: Personally tested. The live site, its terms, its payment pages and its help centre were checked directly from a UK connection, with a small deposit made and withdrawal requested.
Checked on: 10 July 2026, on a Windows laptop using Google Chrome
Operator: ProgressPlay Limited, named in the site footer with its Malta registration (C58305)
UKGC account: 39335, checked against the Gambling Commission register on the same day, including its domain list and the operator’s enforcement history
Sources checked: The general terms and conditions (including the customer-funds and complaints clauses), the welcome bonus terms on the promotions lobby, the payment-methods pages and the help centre. Companies House: not applicable, ProgressPlay is a Malta-registered company.
Change log: 10 July 2026, first published version.
Best Casino Kings sister sites by player type
If you want casino and sports in one account: Casino Kings itself makes the strongest case in this group, with a full sportsbook, live betting and an iOS app around the casino.
If you judge a welcome by its boost: Casino Palace and UK Slots both open at 100% up to £200, four times the ceiling of Fruity King’s match.
If you’d rather test the water cheaply: Yoko Casino’s £10 minimum entry undercuts the rest of this group’s £20.
If free spins are the draw: Casimpo’s 125-spin welcome is the biggest spin package here.
If you want a bit of character with your slots: Fruity King has the most personality in this comparison, and the free-bet side sweetens it for football weekends.
A crown on the door, a standard lobby behind it
Casino Kings talks a regal game; its own copy promises “a truly regal experience”, but the best description of it is a crown logo on a conventional casino. There’s no throne-room styling, no royal mascot, no running joke; past the branding you’re in a standard, competent ProgressPlay lobby of slots rows, live tables and jackpot games. I don’t count that as a failing exactly; plenty of players prefer a site that gets out of the way, but nobody should arrive expecting the theme committed to by the likes of a Fruity King.
What the site does offer is breadth. The casino and live rooms are stocked from the major studios, the sportsbook covers the usual markets with live betting and virtuals, and it’s one of the few brands in this estate with its own iOS app in the App Store. That combination, everything under one roof plus an app, is Casino Kings’s true point of difference inside its own family, and it’s a better reason to pick it than the branding will ever be.
Ownership, licensing and the UK position
Casino Kings is operated by ProgressPlay Limited, a Malta company (registration C58305) based in St Julians, holding both a Malta Gaming Authority licence and a UK Gambling Commission licence under account 39335. ProgressPlay is one of the industry’s big white-label factories: the register lists 179 domains on this one account, of which 101 are live white-labels run for partners, Casino Kings among them, 19 are domains ProgressPlay operates as its own, and 59 are inactive names from deals gone by. In practical terms, when you sign up at Casino Kings you’re a ProgressPlay customer wearing a partner’s colours, on the same wallet infrastructure, support desk and terms as a hundred other storefronts.
There’s a disciplinary matter to attend to here. On 9 May 2025, following a licence review, the Gambling Commission imposed a £1,000,000 financial penalty on ProgressPlay for anti-money-laundering and customer interaction failures. That’s a serious mark against the operator behind this brand, and it belongs in any honest picture of the network. It’s also worth the balancing note: the operator kept its licence, the penalty came with remediation requirements rather than revocation, and the estate has continued trading under Commission supervision since. You can check the licence and its current status yourself:
✓ UKGC Licensed, ProgressPlay Limited (39335), click to verify
On the money itself: ProgressPlay’s terms state that customer funds are held in segregated accounts but are not protected in the event of insolvency. That’s the Gambling Commission’s basic tier, it’s disclosed exactly as the rules require, and it’s common across the industry, but it means large balances are safest in your bank account rather than your casino wallet.
The welcome offer, term by term
The deal: deposit £20 and get 100 free spins on selected slots. The structure is post-2026 UK standard and worth reading closely anyway. You wager from your real balance first, winnings from the spins carry a 10x requirement, the legal maximum a UK site can set, and both the offer and any spin winnings expire seven days after they land. The number that decides the offer’s worth is the conversion cap: whatever you win from those 100 spins, no more than £30 can convert to withdrawable cash. This is a taster, priced accordingly, not a bankroll builder.
Three conditions deserve a highlight. Skrill and Neteller deposits don’t qualify for the welcome, so e-wallet loyalists need to fund another way for the offer. A withdrawal request voids any active or pending bonus, meaning you choose between cashing out and finishing a promotion. And the offer is limited to five brands across the whole ProgressPlay network, so the hundred-plus sister sites aren’t a hundred welcome offers; the estate has a shared memory. Beyond the welcome, a Monday-to-Thursday deposit promotion hands out a random 25 to 100 spins a day on the same 10x terms, which suits regulars more than the headline deal does.
Payments, withdrawals and the fee you should know about
The cashier is conventional in the right ways: PayPal, Visa and Mastercard, Apple Pay, Skrill, Neteller, Paysafecard, Trustly, Pay by Mobile and bank transfer. The minimum deposit is £20 and deposits land instantly; the minimum withdrawal is a low £5, with e-wallets the quickest route back out and standard identity checks possible before a first payout is released.
Then there’s the clause that made me look twice: withdrawals carry a processing fee of 1%, capped at £3 per withdrawal. It’s little money on a £50 cashout, but charging players to receive their own winnings is a habit UK casinos have largely abandoned, and across a year of regular play it adds up. My cashier verdict: solid method coverage and a friendly £5 floor, undercut by a fee that has no business on a modern UK site. If you use it, withdraw in fewer, larger amounts and keep each fee at its £3 ceiling rather than paying 1% repeatedly.
Support and complaints
Support runs on live chat, advertised as 24/7 but only reachable once you’re logged in to an account, backed by email at customersupport@instantgamesupport.com. There’s no customer support phone number. That email domain is worth a second glance: it isn’t a Casino Kings address, it’s the shared support desk serving brands across the ProgressPlay network, which tells you how centralised the operation behind the storefronts really is.
If a complaint deadlocks, the terms set out the escalation: the internal procedure first, then referral to eCOGRA, the site’s approved independent dispute body, free of charge. That’s the full UK safety net working as intended, and it’s the structural difference between a licensed brand like this and the unlicensed sites I cover elsewhere on The Sister Site.
What players report
The player record on Casino Kings is decidedly mixed, and the grumbles cluster where you’d predict: getting paid and getting heard. The recurring complaints describe withdrawals that take longer than expected to arrive and support conversations that feel scripted, polite, repetitive and slow to actually resolve anything. That pattern is consistent enough across recent accounts that I’d treat it as the site’s character rather than bad luck, and it chimes with a support desk that serves a hundred brands at once.
The other half of the ledger: the game library draws consistent praise, the live casino holds up against bigger names, and plenty of players cash out without incident, particularly via e-wallets. Set against the operator’s £1m penalty for compliance failures, my read is that this is a network whose products are better than its processes. Nothing here says avoid; plenty says keep your balance modest and your expectations of the service desk realistic.
What I like, and what I don’t
What I like
- Full UK licensing with GAMSTOP, the 10x cap and a free eCOGRA dispute route behind it.
- Casino, live casino and a proper sportsbook in one account, plus an iOS app most of its sister sites don’t have.
- A flexible cashier with PayPal and Apple Pay, instant deposits and a £5 withdrawal floor.
- A solid, honestly priced welcome with the legal maximum 10x clearly stated.
What I don’t
- A 1% withdrawal fee, capped at £3, that modern UK sites shouldn’t be charging.
- The operator’s £1,000,000 Gambling Commission penalty in May 2025 for AML and customer-interaction failures.
- A £30 conversion cap that keeps the 100-spin welcome firmly in taster territory.
- Customer funds in the basic “not protected” tier, and a support desk shared across the whole network.
- A crown with no kingdom: branding that promises more character than the site delivers.
My Casino Kings verdict
Casino Kings is a safe, capable, slightly charmless way to play, and its main significance is as a door into an estate. The product case is a decent one: sportsbook, live casino and slots in one place, an app, PayPal in the cashier and every UK protection working as designed. The case against is a collection of small print rather than any scandal of its own: a welcome capped at £30 of real value, a withdrawal fee that shouldn’t exist, funds at the basic protection tier, and an operator that took a £1m penalty in 2025 and answers its customers through a desk shared with a hundred other brands. Weigh those, and you get my position: fine to use, worth using knowingly.
On the sister sites, the practical advice writes itself once you know the machinery is identical everywhere: pick by front end. Casino Palace or UK Slots for a proper match bonus, Casimpo for the biggest spin count, Yoko Casino for the cheapest look around, Fruity King for some personality and a free bet. Just remember the estate’s one shared rule: the welcome follows you across a maximum of five brands, so spend those five claims deliberately. And if you arrived here hunting King Casino, that’s a different family altogether; this crown belongs to ProgressPlay.
Casino Kings sister sites FAQ: your questions answered
What are Casino Kings’s sister sites?
Every brand on ProgressPlay Limited’s UK licence 39335, which lists 179 domains: 101 live white-labels including Casimpo, Casino Palace and Fruity King, and 19 domains ProgressPlay runs itself, such as UK Slots and Yoko Casino. The rest are inactive legacy names.
Is Casino Kings the same as King Casino?
No. Casino Kings is a ProgressPlay Limited white-label on UKGC account 39335. King Casino is operated by Jupiter Gaming Limited on account 67098. The names are close; the operators, licences and families are entirely separate.
Who operates Casino Kings and is it safe?
ProgressPlay Limited, a Malta company holding UKGC licence 39335 and an MGA licence. It’s a regulated UK site with GAMSTOP and eCOGRA dispute resolution. Worth knowing: the Gambling Commission fined ProgressPlay £1,000,000 in May 2025 for AML and customer-interaction failures, and customer funds sit in the basic “not protected” tier.
What is the Casino Kings welcome offer?
Deposit £20 and get 100 free spins on selected slots. You wager from your real balance first, spin winnings carry 10x wagering within 7 days, and the maximum you can convert from the spins is £30. Skrill and Neteller deposits don’t qualify, and the offer can only be claimed at five brands across the ProgressPlay network.
Do Casino Kings withdrawals have a fee?
Yes. Withdrawals carry a processing fee of 1%, capped at £3 per withdrawal, under the site’s own terms. The minimum withdrawal is £5, e-wallets are the fastest route, and identity verification may be needed before a first payout.