Onyx Slots Sister Sites: Where Grace Media Players Go Now

Onyx Slots Sister Sites in Full

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A quick note on what counts as a sister site. Grace Media does not publish an official “family” page, so there is no in-house definition to lean on. On this page a sister site means what most UK players mean by it: another casino run by the same operator, under the same UKGC licence, on the same platform. That is the relationship you can actually verify, and it is the one that matters for how your money and your self-exclusion are protected.

The Best Alternatives at a Glance

• Closest in spirit: PlayUK, slots-first, clean and long-established.
• Best for a big slots library: Hot Streak, well past 1,500 titles.
• Best for slots purists: Cosmic Spins, quality over quantity, very little clutter.
• Best for a small starter bonus: Vegas Wins, a 100% match up to £20 at 10x.
• Best for a fresher feel: Mango Spins, the newest face of the group.
• Avoid (closed): SlotStrike and Slotty Slots shut at the same time as Onyx.

Sister Sites Compared

Sister site	Status	UKGC licence	Best for	Welcome offer (always check)	Compared to Onyx Slots
Onyx Slots	Closed (late 2025)	57869 (Grace Media)	Wager-free spins fans	Was up to 100 wager-free spins	The brand this page is about
PlayUK	Open	57869 (Grace Media)	A like-for-like swap	100% up to £50, 10x	Bigger, older, same slots-first feel
Hot Streak	Open	57869 (Grace Media)	Sheer choice	Spins on Big Bass, check terms	Far more slots, same backbone
Cosmic Spins	Open	57869 (Grace Media)	Slots purists	100% up to £50, 10x	Leaner lobby, similar payments
Vegas Wins	Open	57869 (Grace Media)	Low-deposit players	100% up to £20, 10x	Smaller bonus, same licence
Mango Spins	Open	57869 (Grace Media)	A newer look	Spins offer, check terms	Brighter theme, same engine

Bonus terms move around, so always read the offer on the casino itself before you deposit. Since 19 January 2026 no UK casino can set a wagering requirement above 10x.

PlayUK

If you want the nearest thing to Onyx with the lights still on, PlayUK is it. It has been going since 2018, which makes it one of the steadier names in the group, and it is run by Grace Media on the same UKGC licence (57869) that Onyx used. The lobby is slots-first and kept plain on purpose, a few hundred titles from the usual suspects like NetEnt and Red Tiger, and the welcome deal is a 100% match up to £50 with 10x wagering and a £50 conversion cap. Payments are the familiar card, PayPal and pay-by-phone set, with £10 minimums.

Versus Onyx Slots: same operator and same clean approach, but PlayUK is bigger, older and still taking players, so it is the safe like-for-like move.

Hot Streak

Hot Streak is the one to pick if Onyx ever felt a bit thin on games. The slot count runs well past 1,500, Pragmatic Play Drops and Wins titles included, and there is a “Welcome Slots” shelf that pushes the popular games at newcomers. It is dual-licensed by the UKGC (57869) and the Gibraltar Regulatory Authority, the same pairing Onyx carried, and live chat is on hand. The trade-off is that all that choice can feel busier than the stripped-back Onyx layout some people liked.

Versus Onyx Slots: the same Grace Media backbone with a much deeper library, so it suits players who found Onyx a touch small.

Cosmic Spins

Cosmic Spins is for the slots purist. It keeps the lobby tight rather than huge, leans on Play’n GO and NetEnt, and skips most of the side attractions, which is very much the Onyx way of doing things. It moved onto the Grace Media platform in spring 2024, so an older login may still work, and it sits under the same UKGC licence. The welcome offer is a 100% match up to £50 at 10x, with a £50 conversion cap.

Versus Onyx Slots: arguably the closest match for someone who valued Onyx for its no-clutter, slots-only feel.

Vegas Wins

Vegas Wins keeps the entry bar low. The welcome match is a more modest 100% up to £20 at 10x with a £20 conversion cap, which suits a cautious first deposit rather than a big one. It is a UKGC-licensed Grace Media brand built on the Markor platform, so the plumbing differs a little from Onyx even though the licence and the operator do not. Slots lead, with a small live and table corner.

Versus Onyx Slots: smaller bonus and a slightly different platform, but the same regulatory cover and the same slots-led focus.

Mango Spins

Mango Spins is one of the brighter, newer faces in the group, and it is the pick if the monochrome Onyx look left you cold. The theme is louder, the slot range pulls from names like Big Time Gaming and Pragmatic Play, and it runs on the same Grace Media engine under the same UKGC licence. Expect a spins-led welcome, and as with the rest of the family, any match bonus now tops out at 10x.

Versus Onyx Slots: same operator and protections, with a more colourful, livelier front end.

The Complete Grace Media List

Grace Media runs a long roster of UK casinos on the one licence, so the network is much wider than the five above. It grew quickly after the company took over Nektan’s consumer business in 2020, and brands come and go.

Still open and worth a look: PlayUK, Hot Streak, Cosmic Spins, Vegas Wins, Mango Spins, Jackpot Mobile Casino, Fortune Mobile Casino, Slots Rush and Fruity Wins.

Now closed: Onyx Slots, SlotStrike and Slotty Slots all shut as Grace Media trimmed the group down to its better performers. If you find an old article still recommending those three, it is out of date.

Any list like this is a snapshot. The one source that does not go stale is the operator entry on the UK Gambling Commission public register: search Grace Media (Gibraltar) Limited there and you will see the licence status and the trading names attached to it.

What Was the Same and What Was Different

Feature	Onyx Slots (when open)	Grace Media sisters
Operator	Grace Media (Gibraltar) Limited	Grace Media (Gibraltar) Limited
UKGC licence	57869	57869 (shared)
Signature bonus and wagering	Wager-free welcome spins	Mostly 100%% match at 10x, the new UK ceiling
Loyalty or cashback	Light, low-key rewards	Varies, generally modest
Game library	Around 600 to 750 slots	From a few hundred to 1,500-plus
Bingo	No	A few of the group offer it
GamStop	Yes	Yes, all UKGC brands
Design	Minimalist, monochrome	Shared template, different skins

Are These Official Sister Sites?

It helps to split the field into three. First, the genuine same-operator network: casinos run by Grace Media on licence 57869, which is what this page covers and what you can verify on the register. Second, lookalikes: unrelated UK casinos with a similar slots-first style that share no ownership with Onyx, so calling them sisters is loose at best. Third, and worth a clear warning, the old onyxslots.com address itself. With the brand closed, any gambling site now sitting on that domain has nothing to do with Grace Media, so check its licence on the register before you go near it.

Onyx Slots Review

Onyx Slots launched in April 2024 and lasted around eighteen months before Grace Media pulled the shutters in late 2025. While it ran it was a likeable, low-drama slots casino, the kind that did not shout. The design was monochrome and tidy, the menus were where you expected them, and there was a mobile app for iOS and Android rather than just a phone-friendly site. None of it was flashy, and that was rather the point.

Welcome Offer

The welcome deal was the headline, and it was a good one. You put in and wagered £10, and you got 20 cash spins, repeatable up to five times for as many as 100 spins, with no wagering on the winnings. What you won, you kept. In a market that usually buries free spins under play-through small print, a wager-free offer stood out, and it is the thing players remember Onyx for. The catch was minor: the featured slot was chosen for you and changed now and then.

Games and Providers

This was a slots site first and almost only. The library sat somewhere around 600 to 750 titles depending on when you counted, with NetEnt, Big Time Gaming, Eyecon and Red Tiger among the names, and a handful of Megaways games for anyone after higher volatility. Table games and live dealer were present but plainly an afterthought, a small room rather than a proper floor. If you came for blackjack with a bow-tied dealer you came to the wrong place.

Payments and Withdrawals

Banking was kept simple: Visa, Mastercard, PayPal, pay-by-phone and Trustly, with £10 minimums. Trustly and e-wallet cashouts usually cleared inside 48 hours, while debit-card withdrawals could drag, especially over a weekend, and a few players grumbled about that. There were no withdrawal fees, which is always welcome.

Support and Responsible Gambling

Support ran through live chat, a bot first and then a human if you pushed past it, plus a contact form for anything longer. There was no phone line. On the safer-gambling side Onyx carried the standard UKGC kit: deposit limits, time-outs and full GamStop cover, so a self-exclusion set there applied across every UK-licensed casino. GamCare and BeGambleAware were a click away.

How It Compared to Its Sisters

Honestly, Onyx was a near-twin of the other Grace Media skins, the wager-free welcome aside. Same engine, same support style, same KYC. The wager-free spins were the bit that really set it apart, and that edge has softened now the UK has capped all bonus wagering at 10x, which narrows the gap between a wager-free offer and a sister’s 10x match.

Key Facts

Operator:	Grace Media (Gibraltar) Limited
Parent / group:	Grace Media (Gibraltar HQ, Manchester office)
Platform / network:	Grace Media white-label platform
Licence(s):	UKGC (#57869); Gibraltar Regulatory Authority
Established:	April 2024
Status:	Closed, late 2025
Sister sites:	PlayUK, Hot Streak, Cosmic Spins, Vegas Wins, Mango Spins and more
Game providers:	NetEnt, Big Time Gaming, Eyecon, Red Tiger
Payments:	Visa, Mastercard, PayPal, pay-by-phone, Trustly
Min deposit / withdrawal:	£10
Withdrawal time:	Up to 48 hours by fast methods, longer by card
Support:	Live chat and contact form, no phone
Our rating:	6/10

Operator details last reviewed: June 2026 (last updated 4 June 2026).

Pros and Cons

Pros

• Wager-free welcome spins meant the winnings were truly yours, no play-through to clear first.
• Clean, monochrome, slots-first design that was easy to find your way around on a first visit.
• Dual UKGC and Gibraltar licensing with full GamStop cover, so the protections were never in doubt.
• A real iOS and Android app rather than a cut-down mobile page.

Cons

• It is closed, so you cannot actually play there now, whatever an older review tells you.
• The library was small, in the 600 to 750 range, when sisters like Hot Streak carry well over 1,500.
• Live dealer and table games were token at best.
• Debit-card withdrawals could be slow, particularly across a weekend, and there was no loyalty scheme to speak of.

Frequently Asked Questions

Is Onyx Slots still open?

No. Onyx Slots closed in late 2025 when Grace Media trimmed its line-up to its stronger brands. If a gambling site is now using the old onyxslots.com address, treat it as unrelated and check its UKGC licence first.

Who owned Onyx Slots?

Onyx Slots was run by Grace Media (Gibraltar) Limited, a white-label operator with a Gibraltar base and a Manchester office, under UK Gambling Commission licence 57869. Grace Media took over Nektan’s consumer casino business in 2020.

What were Onyx Slots’ sister sites?

The genuine sisters are the other Grace Media casinos on the same licence: PlayUK, Hot Streak, Cosmic Spins, Vegas Wins and Mango Spins are the main ones still open. SlotStrike and Slotty Slots were sisters too, but they closed alongside Onyx.

Are Onyx Slots sister sites on GamStop?

Yes. Every Grace Media casino is UK Gambling Commission licensed, and all UKGC online operators must be part of GamStop. A self-exclusion you set at one applies across every UK-licensed site, so the protection follows you.

What is the best Onyx Slots alternative?

For a like-for-like swap, PlayUK: same operator and licence, the same slots-first style, and still open. If you valued Onyx for being slots-only with no clutter, Cosmic Spins is the closest match.

Is SlotStrike a sister site of Onyx Slots?

It was, on the same Grace Media licence, but SlotStrike has also closed, so it is not somewhere you can sign up today. Any list still pushing it as a live Onyx alternative is out of date.

Are PlayUK and Onyx Slots sister sites?

Yes. PlayUK runs on the same Grace Media licence (57869) that Onyx used, which makes it a true sister site, and since it launched back in 2018 it is one of the more established names in the group.

Do the Grace Media casinos have high wagering requirements?

Not any more. Since 19 January 2026 UK rules cap any bonus wagering requirement at 10x, so the Grace Media match offers you will see now run at 10x. Onyx itself went a step further while it was open, with wager-free welcome spins.

Our Verdict on Onyx Slots

Onyx Slots was a tidy, honest little casino, and the wager-free welcome spins were the best thing about it, but the library was thin and it is now closed, so the only sensible verdict is where to go instead. For most people leaving Onyx the answer is PlayUK: same operator, same licence, the same plain slots-first feel, and it is still open and taking players. If it is the no-clutter, slots-only mood you are chasing, Cosmic Spins runs it close. The score below reflects what Onyx was when it operated, not a site you can still join.

CasinoSisterSite rating: 6/10