20+ years in the gambling industry including 13+ years playing and reviewing slots.
Behind all slot games you play at online slot sites, are casino or slot providers who make them. Each with their own mechanics, bonus features and style, there are hundreds of online slot providers who produce games for UK players.
Below, you’ll find details of the top slot providers who make the games we all love and play. Below, you’ll find information on studios such as Nolimit City, Pragmatic Play, NetEnt, Push Gaming and Play ‘n GO.
Best Slot Providers
With links to detailed slot provider guides, they highlight their best games, free slot demos, where to play them for real money as well as key facts and information. They also include their highest max win and RTP slots, slot series, innovations and unique mechanics. All slot studios have a valid operating license from the Gambling Commission so are trusted, well-established and reputable.
Nolimit City
With over 100 games, Nolimit City was founded in 2014 and is regarded as the best slot provider around. You won’t find ordinary games with generic themes and mechanics. Nolimit City are known for their unique and innovative slots coupled with controversial themes and storylines that push the boundaries further than you could ever imagine.
Nolimit City slots also use unique, in-house xMechanics to make them stand out from the crowd. There are slots based on prisons, notorious serial killers, blood-thirsty killing machines, punk rock, BDSM parties, fat bast*rds, twisted demons, hillbilly fishermen, the US/Mexican border, Russian labour camps and war!
Known for their best payout slots, the most popular Nolimit City slot games include Tombstone RIP (with 300,000 x bet max wins), San Quentin 2: Death Row, Fire in the Hole, Kenneth Must Die, Serial and Gluttony. Check out Nolimit City slot reviews, free demos and much more in our dedicated guide:
105 Best Nolimit City Slots Ranked - (Where to Play)
Pragmatic Play
Founded in 2015, Pragmatic Play offers you more than 350 slot games with multiple releases per month. Arguably the most popular slot provider, they are best known for their fishing-themed Big Bass slot series which has seen various slot and casino sites use Big Bass games to offer no wagering free spins offers.
Other popular Pragmatic Play slots include Wolf Gold, The Dog House Megaways and the iconic Sweet Bonanza. With lots of Megaways games, they have a 1000 slot series which are supercharged versions of popular slots with higher max win potential.
Pragmatic Play is certified and licensed in over 40 jurisdictions and offers multi-award-winning games that are available on devices, in all currencies and 33 languages. With a superb and easy-to-use interface, their slots are particularly great on smartphone devices.
Best Pragmatic Play Slots, Sites and Game Reviews
Play ‘n GO
Founded in 2005, Play ‘n GO is one of the world’s leading slot providers. With a steady flow of new games, there are over 350 Play ‘n GO slots to enjoy. Available at the overwhelming majority of slots, casino and gambling sites, all games use their own mechanics and bonus features.
Play ‘n GO was the first slot provider to bring mobile slot games to market with all their titles available to play seamlessly on smartphones and tablets. With various industry awards, PnG is best known for its Book of Dead slot which has become the most popular of all ‘Book of’ slots online. This has resulted in the fully-fledged Dead (set in ancient Egypt) and Wilde slot series which feature daughter Cat and uncle Gerard.
Also known for their quirky Reactoonz slot series, popular Play ‘n GO games include Raging Rex 3, Moon Princess, Rise of Olympus, Return of the Green Knight and Legacy of Dead. Like music? There are various official slot games dedicated to rock bands KISS, Def Leppard, Mötley Crüe and ZZ Top as well as artists/bands such as *NSYNC and Alice Cooper.
Best Play ‘n GO Slots, Sites and Game Reviews
NetEnt
Founded in 2006, NetEnt is one of the leading slot providers. Offering over 200 slot games, the mobile-friendly studio has gone from strength to strength with many cult favourites. With so many great NetEnt slots, their most popular game and one of the most played online slots of all time is the iconic Starburst.
With other play favourites such as Gonzo’s Quest, Blood Suckers, Piggy Riches, Aloha! Cluster Pays and Dead or Alive 2, NetEnt are also responsible for some of the internet’s most popular progressive jackpot slots such as Mega Fortune, Hall of Gods and Arabian Nights.
NetEnt is responsible for the first Cluster Pays game, the innovative Avalanche mechanic and a whole host of branded games such as Vikings, Narcos, Ozzy Osbourne, Street Fighter 2: The World Warrior and Jumanji.
Best NetEnt Slots, Sites and Game Reviews
Big Time Gaming
Formed in 2011, Big Time Gaming has created more than 60 slot games. Not an ordinary slot provider by any stretch of the imagination, BTG is a pioneer in the online slots world as they created the much-loved Megaways mechanic. Most Big Time Gaming slots use Megaways with Bonanza Megaways the most popular of all. Due to their appeal, BTG licensed the mechanic to countless other slot providers meaning there are hundreds of Megaways slots available.
Offering high RTP rates and big win potential, Big Time Gaming didn’t rest on the success of Megaways. They created Megaclusters, Megaquads and Megadozer mechanics as well as a Megapays jackpot network.
With plenty of slot sequels, BTG’s best games include Lil’ Devil, Extra Chilli Megaways, Star Clusters Megaclusters and White Rabbit Megaways. Big Time Gaming also has lots of branded titles with the likes of Monopoly Megaways, several Who Wants to be a Millionaire slots and plenty of games based involving rock bands/songs (i.e. The Final Countdown and Danger High Voltage).
Best Big Time Gaming Slots, Sites and Game Reviews
Playtech
Founded in 1999, Playtech is one of the biggest online casino game providers in the world. Offering hundreds of options, you’ll find their slots at UK gambling sites which offer sports betting primarily. Best known for their excellent slot series, I particularly recommend the Fire Blaze and Cash Collect series as well as the iconic Age of the Gods slots.
With many top online and land-based favourites such as Great Blue, Buffalo Blitz and Halloween Fortune, Playtech also has an extensive jackpot slot offering with the likes of Jackpot Giant, the Age of the Gods, Kingdoms Rise and Sporting Legends series.
I particularly like Playtech’s movie and television series/show tie-ins. Their broad branded slots portfolio includes Gladiator: Road to Rome, The Walking Dead, Breaking Bad Cash Collect & Link, Rocky, RoboCop, The Mummy Books of Amun Ra and Gold Rush: Cash Collect.
Best Playtech Slots, Sites and Game Reviews
Push Gaming
Established in 2010, Push Gaming is a slot provider focusing on quality rather than quantity. With a mobile-first approach, you’ll know when you’re playing Push Gaming slots due to the unique, high-definition feel of the graphics and animations.
Their most popular games include Razor Shark, Big Bamboo, Fat Rabbit, Fat Santa and The Shadow Order. All their slots use innovative, in-house mechanics and high win potential (Razor Returns pays up to 100,000 x bet).
I love the Jammin’ Jars slots with Jammin’ Jars and Jammin’ Jars 2 two of the most played UK slot games ever. With a new game every month, themes are quirky and unconventional giving them an edge over other slot studios.
Best Push Gaming Slots, Sites and Game Reviews
Relax Gaming
Releasing slot games since 2018, Relax Gaming has become a major slot provider in a relatively short space of time. With over 100 games to choose from, they are known for their Money Train slot series (with Money Train 4 being the best game as it offers 150,000 x bet max wins).
Relax is known for its Dream Drop jackpot slots where there are over 40 slots in the network as well as several exclusive ones available only at Unibet Casino. Offering progressive jackpot versions of popular slots, there are 5 jackpots to be won with the Mega Jackpot guaranteed to pay out before it reaches €3 million. Due to its popularity, other slot providers have created Dream Drop games.
There are plenty of superb Relax Gaming slots to enjoy with the likes of Dead Riders Trail, Ancient Tumble, Beast Mode, Space Miners and Cluster Tumble to name a few. They even have a ‘Book of’ slot (Book of 99) with an unprecedented 99% RTP rate.
Best Relax Gaming Slots, Sites and Game Reviews
Hacksaw Gaming
Founded in 2017, Hacksaw Gaming has established itself as one of the top slot providers in recent years. With amazing graphics, concepts and soundtracks, their mobile-first slots are amongst the most popular at UK slot sites and for good reason.
The best Hacksaw Gaming slots include Chaos Crew 2, Hand of Anubis, Fire My Laser, 2 Wild 2 Die, Stormforged and Donut Division. Hacksaw is also responsible for in-house mechanics such as DuelReels, Echospins, Hoppers, Super Cascades and the unique use of wild multipliers. Most games also offer multiple free spins features.
I love Hacksaw’s Best of Bonus feature which can be found in several games. You get the play the main bonus feature 3 times in succession with the best outcome awarded. A personal favourite, Hacksaw Gaming slot games are worth your time.
Best Hacksaw Gaming Slots, Sites and Game Reviews
ELK Studios
Established in 2013, ELK Studios has come a long way since their first slot game Electric Sam was released. With a mobile-first approach, there are over 100 ELK slots to play. Known for their Cluster Pays games, their games have a unique visual style.
Some of their best titles include Rabbit Royale, Propaganda, Avalon Gold, Taco Brothers Derailed and Coba. ELK Studios are known for their slot series: the Cygnus and Pirots series are very popular.
However, nothing tops their extensive range of Nitropolis slots. With 5 main slots and various spin-offs featuring several clans, you head to a post-apocalyptic world for big win potential and unique mechanics such as Nitro Reels and Nitro Boosters. The only downside is that all their slot games in recent years have an RTP rate of 94%.
Best ELK Studios Slots, Sites and Game Reviews
Blueprint Gaming
Found at most UK casinos and slot sites, Blueprint Gaming was founded in 2001 and is focused on UK players. With over 200 slot games to choose from, they offer a massive portfolio of branded slots based on movies, television shows and sporting icons: games include Ted Megaways, The Goonies, The Flintstones, Deal or No Deal Megaways and Maradona El Pibe.
Blueprint Gaming is best known for its Fishin’ Frenzy slots. These much-loved fishing-themed games paved the way for Pragmatic Play’s Big Bass series and there are new additions regularly. Blueprint also has a Jackpot King network which offers jackpot versions of popular games. They are local progressive jackpots which are for each casino or casino group.
Finally, Big Time Gaming may have invented Megaways but Blueprint Gaming has a bigger Megaways slots portfolio than any other slot provider. The best games to use the shape-shifting mechanic include Diamond Mine Megaways, The Goonies Megaways and Vikings Unleashed Megaways.
Best Blueprint Gaming Slots, Sites and Game Reviews
Print Studios
Founded as recently as 2020, Print Studios offers superb slot games which are unique, immersive and appealing. With unique mechanics such as SuperSpinners, they are probably the best-looking slots you’ll ever come across.
Print games became popular with the release of Royal Potato which takes you to a wonderful world of potatoes. With a sequel available which offers 40,000 x bet max wins, they offer terrifying slots in Darkness and Dreadworks where you can choose how dark the game appears.
Other great Print Studios slots include Reapers, Holy Hand Grenade, Shinobi Spirit and Eldritch Dungeon. They are best known for their Pine of Plinko series which comes with a unique Plinko bonus game.
Best Print Studios Slots, Sites and Game Reviews
4ThePlayer
Formed in 2018, 4ThePlayer is a UK-based slot provider. All their slot games begin with a number ensuring they remain in pole positions in casino and slot site lobbies. Mobile-focused, you can play 4ThePlayer slots on a smartphone device using Big Reel Portrait Mode: this occupies up to 80% of your screen for a superior playing experience.
The best 4ThePlayer games include 9k Yeti, 10000 BC 2 DoubleMax, 7x7 Zeus and 21 Thor Lightning Ways. With several unique mechanics, I particularly love the 90k Yeti Gigablox slot which offers 90,000 x bet max wins. Another good game is 4 Fantastic Vikings Go Fishing which is a collaboration between 4ThePlayer and Yggdrasil Gaming.
Finally, 4ThePlayer also offers you 2 Dream Drop jackpot slots: 5 Doggy Millionaires Dream Drop and 5k Gold Mine Dream Drop. The latter paid out €2.3 million back in April 2023.
Best 4ThePlayer Slots, Sites and Game Reviews
Other Slot Providers
With over 100 online slot game developers, OLBG will publish in-depth guides to the most popular ones in due time. In future, you can expect guides for the following studios:
- IGT
- Games Global (formerly Microgaming)
- Novomatic (Greentube)
- Thunderkick
- Red Tiger Gaming
- Yggdrasil Gaming
- Light & Wonder
- Peter & Sons
- Slotmill
- Quickspin
Slot Provider Interviews
Playing and reviewing slot games for over 13 years, I have long and established relations with all major slot providers. Below you'll find links to exclusive interviews which give insider knowledge of how things work behind the scenes and what to expect in future:
🎤 Big Time Gaming Slots Q&A with Nik Robinson
🎤 Sweet Bonanza 1000 Q&A with Pragmatic Play
🎤 Nolimit City Slots Q&A with Per Lindheimer
🎤 Push Gaming Slots Q&A with Amit Samji
🎤 4ThePlayer Slots Q&A with Henry McLean
🎤 Print Studios Slots Q&A with Carl Wiggman
🎤 Blueprint Gaming Slots Q&A with Daniel Kalinowski
🎤 ELK Studios Slots Q&A with Jacob Nordwall
🎤 Play ‘n GO Slots Q&A with George Olekszy
🎤 Relax Gaming Slots Q&A with Shelley Hannah
🎤 Yggdrasil Gaming Slots Q&A with Marcin Tomala
🎤 IGT PlayDigital Slots Q&A with Phil O’Toole
Choosing the Right Slot Provider
Known as a slot studio, casino game developer or online casino software provider, a slot provider is a company that makes slot games for use in land-based or online casinos and slot sites (or both). With hundreds of manufacturers of slot games, below is a list of criteria that is paramount to choosing the right slot provider for you:
- Licensed by the Gambling Commission: Like online gambling sites, all slot providers need a license from the Gambling Commission to offer their slot games in the UK. This ensures the company behind the games is reputable, trustworthy and offers ‘fair’ games that have been tested vigorously by independent testing houses such as BMM TestLabs, eCOGRA and iTechLabs (among others). For more information on what is required, check out the Gambling Commission’s page on Test Houses.
- Mobile-Compatibility: With most of us doing everything on smartphones, slot games must be produced using HTML5 technology. This ensures games are compatible with any screen resolution such as laptops, PCs, mobiles and tablets. The better slot providers offer Portrait Modes of their slots which make better use of your screen.
- Interface: Good slot games are easy to play and navigate your way around. Buttons should be clear and allow you to access the Paytable and vital information such as the rules and the RTP rate. A slick interface can sometimes be the difference between a positive or negative playing experience.
- Portfolio of Slot Games: Whilst some slot providers have been around for over 20 years, having lots of slot games to choose from helps. If you like Pragmatic Play, for example, they have games using lots of different themes, mechanics and volatility levels ensuring their offering caters to all players. Smaller slot studios will offer less choice but tend to offer higher-quality games as a result.
- RTP Rates: The Return to Player rate refers to the payback percentage of a slot game. With the average being around the 96% mark, slot providers will normally produce multiple RTP versions of their games. Whilst the RTP rate differs per game, you must play slot games that offer a decent RTP rate that is available within the game’s Paytable.
- Mechanics & Innovation: It’s easy for slot games to have the standard 5 reels and a certain number of paylines. Whilst some games with this setup are great, a slot provider should be inspired by innovation and offer new mechanics and concepts. The likes of Nolimit City and ELK Studios have their own mechanics which offer a unique playing experience.
- Availability: A slot provider’s games should be available at various online gaming sites. Whilst you may love slot games from a certain developer, the slot site that offers it may not be for you for several reasons. The better sites will often release games exclusively early as well as offer promotions (such as free spins) on new slot games. I recommend playing at a slot site that has games from several providers ensuring choice.
