Explore Onyx Slots sister sites. Our team of casino experts compiled a list of all Onyx Slots sister sites you can play in the UK.
All Onyx Slots sister casinos operate on the reliable Grace Media platform, have a UKGC licence and offer similar gambling experiences to players. While they share a familiar feel, each one brings its own flair to the mix, whether it's different bonuses, game selections or themes.
Here, you'll find a list of Onyx Slots sister sites. We have tested and reviewed each site, so you'd find the most suitable one that matches your preferences.
Onyx Slots sister sites are listed below:
| 1st deposit bonus | 100%/£100 |
|---|---|
| No deposit bonus | - |
| Minimum deposit | £10 |
| Bonus code | |
| Number of games | 650 |
PlayUK Casino is a leading UK Casino established in 2018. With a primary focus on online slot games, this online casino does provide their customers with a huge game collection ... PlayUK casino review »
The best Onyx Slots sister sites offer exciting slot collections, solid bonuses, excellent customer support, trusted banking methods and mobile-friendly experiences.
The best Onyx Slots sister sites are listed below:
The best Onyx Slots sister site is SlotStrike.
SlotStrike is a modern online casino with a strong military theme. The design might seem rough around the edges, but this casino delivers a sweet selection of games and juicy bonuses.
The collection is mostly made up of slots, but you'll also find a few table games and live casino options. Just like at Onyx Slots, you can enjoy easy navigation, mobile-friendly play and low deposit limits.
New players can kick things off by claiming no-wagering bonus spins on selected slots. Read more about the casino and how to claim the bonuses in our expert review of SlotStrike.
| 📅 Launch | 2018 |
|---|---|
| 🎁 Bonus | Up to 100 bonus spins |
| ✅ Best Features | Strong theme, great game catalogue, responsive customer support |
If you're looking for an easygoing alternative with top-tier slot selection, Slotty Slots is worth exploring. Much like Onyx Slots, it features a simple interface, streamlined gameplay and straightforward payments.
The simplicity makes for a smooth experience across devices. You'll enjoy over 600 titles from leading game developers. With providers like NetEnt, Microgaming and ELK Studios, the quality is hard to miss.
Take a look at our casino review of Slotty Slots, which dives deep into the bonuses, games, banking, customer support and more.
| 📅 Launch | 2019 |
|---|---|
| 🎁 Bonus | Up to 100 bonus spins |
| ✅ Best Features | Good bonuses, easy-to-use site, high-quality library |
PlayUK is another excellent sister casino to Onyx Slots, thanks to the simple design, easy navigation and exciting selection of popular slots. While the library is on the smaller side and relies heavily on Pragmatic Play, it's full of quality titles from evergreen hits to hot releases.
PlayUK welcomes new players with 100 bonus spins, which give you an excellent boost at the casino. Small deposit limits and a user-friendly interface across devices make playing here a breeze.
Read more about the casino, its bonuses, games, withdrawal times and other features in our PlayUK casino review, written by our experts.
| 📅 Launch | 2018 |
|---|---|
| 🎁 Bonus | 100%/£100 |
| ✅ Best Features | Top quality slots, mobile-friendly site, low deposit limits |
Cosmic Spins offers a gaming experience similar to Onyx Slots. This vibrant casino features quick customer service, good responsible gambling tools and a fun variety of games.
With around 300 titles available, primarily slots, you'll also find a small selection of table games and live casino options. You can learn more about the game library and other exciting features in our Cosmic Spins casino review.
The casino rolls out a solid match bonus for new players. Just pick your favourite payment method from a range of trusted options, deposit £10 or more, and the bonus is yours.
| 📅 Launch | 2019 |
|---|---|
| 🎁 Bonus | 100%/£100 |
| ✅ Best Features | Helpful customer support, solid bonuses, good responsible gambling tools |
If a small, easy and pocket-sized casino is your thing, we'd recommend checking out Fortune Mobile Casino. It's a great partner site to Onyx Slots, offering a curated selection of popular slots, straightforward banking and low deposit limits.
Our experts appreciated the casino's friendly customer support, solid welcome bonus and ongoing promotions, all highlighted in our Fortune Mobile Casino review.
As the name suggests, the casino runs smoothly on a mobile device. The small size, clear layout and intuitive navigation serve up a seamless experience across devices.
| 📅 Launch | 2019 |
|---|---|
| 🎁 Bonus | 100%/£100 |
| ✅ Best Features | Great mobile casino, simple layout, ongoing promotions |
Onyx Slots is a modern online casino, built on a simple and easy-to-use site. Launched in 2024, the casino caters mainly to slot lovers. While they have some table games and live dealer options available, slots take the centre stage here. The collection is powered by around 30 providers, ensuring versatility within. Thus, the casino caters to both beginners and experienced players.
New players can kick things off with 20 bonus spins spread over their first five deposits, adding up to 100 bonus spins in total. It's a pretty sweet bonus with straightforward terms, and the best part is that the spins are completely wager-free.
In addition to the exciting slot collection and no-wagering bonuses, our experts praised the casino's excellent customer support, well-designed site and intuitive navigation in our review of Onyx Slots. The site is fully mobile-optimised, making it a perfect pick for those who love spins on the go.
Onyx Slots is part of the Grace Media family of casinos, which means it runs on a reliable and trustworthy platform. Like all Grace Media casino sites, it's fully licensed by the United Kingdom Gambling Commission, ensuring a safe and secure gambling environment for British players.
See the Onyx Slots alternatives and compare them in the table below:
| Casino | Bonus | Games | Payment Methods | UK Licence |
|---|---|---|---|---|
| Onyx Slots | Up to 20 bonus spins | 720+ | 6 | ✅ |
| SlotStrike | Up to 100 bonus spins | 670+ | 5 | ✅ |
| Slotty Slots | Up to 100 bonus spins | 680+ | 7 | ✅ |
| PlayUK | 100%/£100 | 650+ | 7 | ✅ |
| Cosmic Spins | 100%/£100 | 300+ | 5 | ✅ |
| Fortune Mobile Casino | 100%/£100 | 400+ | 6 | ✅ |
| Jackpot Mobile Casino | 100%/£100 | 740+ | 5 | ✅ |
| Vegas Wins | 100%/£100 | 750+ | 5 | ✅ |
| Hot Streak Casino | 100%/£100 | 800+ | 5 | ✅ |
| 333 Casino | 100%/£100 + 100 bonus spins | 900+ | 10 | ✅ |
Onyx Slots is a great pick for slot enthusiasts who appreciate excellent customer service, streamlined play and top functionality across devices. Choosing a similar casino lets you play with the same high standards, while unlocking new bonuses and exploring fresh games.
Below, you can read more about why you should choose a similar casino to Onyx Slots.
Onyx Slots partner casinos are somewhat similar when it comes to intuitive layouts and user-friendly navigation, making it easy to feel right at home, no matter which one of the sister sites you choose.
While they offer familiar experiences, each casino features its own unique theme and visual identity. For instance, SlotStrike has a bold military theme, PlayUK adds a splash of colour, and both Onyx Slots and Fortune Mobile Casino showcase a sleek, dark and elegant design. This means you get a fresh feel while maintaining the same standards.
When you choose to play at an Onyx Slots sister casino, you get to enjoy fresh bonus offers while still playing on a site that feels familiar.
The bonus offers share similarities, but you might notice some differences across the sites. PlayUK, Slotty Slots, SlotStrike and Onyx Slots treat new players with first deposit bonus spins, and some casinos even skip the wagering requirements. However, if that's not quite your style, try Fortune Mobile Casino or Cosmic Spins for 100% match bonuses.
Onyx Slots and its partner sites support almost identical payment methods, making it easy to switch between the sites. You can choose your preferred option from a couple of trusted methods, including bank cards, Trustly, MuchBetter and bank transfer.
All these sites are Trustly deposit casinos, and both the deposits and withdrawals are often processed quickly. The sites are known to offer low banking limits, but be aware of the fees that take place if you cash out less than £30.
Just like Onyx Slots, its sister sites are fully licensed by the United Kingdom Gambling Commission. This means they must follow strict rules and regulations when it comes to fair and responsible gambling.
You can play with peace of mind at a UKGC-licensed gambling site, knowing that your personal data is safe, the casino knows its customers, prevents harmful activities, and offers a range of responsible gambling tools to players. The tools often include deposit limits, time limits, wager limits and self-exclusion, among others.
When it comes to game selection, Onyx Slots and its partners put quality over quantity. The collections across casinos are heavily slot-focused. If you're craving variety, you can try out a curated selection of table games and live casino games.
While the game libraries are somewhat similar, each site brings something a little different to the table. Playing at Onyx Slots' sister casinos is a great way to discover new online slots UK, packed with fresh features. For instance, Fortune Mobile Casino and PlayUK shine with a strong lineup of popular and new titles from Pragmatic Play, while Onyx Slots, Cosmic Spins and SlotStrike bring a bit more variety.
