Best Online Slot Sites 2022

By Danielle Clark & others on Fact checked by Adam Dickinson
Ready to set the reels spinning? We’ve handpicked the best online casinos to play slots online. From the hottest new video slots to old cult classics, these top slot sites have games for everyone. All you need to do is compare, sign up and start playing!

Slots are always popular at online casino sites, but which operators truly excel when it comes to the reels? Here at Compare.bet, we’ve compiled a list of the best slots sites in the UK, making it easy for you to compare the best slots sites and sign up to your favourite.

UK Licensed UK Licensed
Expertly Reviewed Expertly Reviewed
Mobile Friendly Mobile Friendly
Fast Withdrawals Fast Withdrawals
Slot Site Score New Customer Offer Expert Review Secure Sign Up Link Slot Games iOS App Android App Live Games Terms
1. Casushi
72%
100% Up To £50 + 50 Free Spins

Reviewed, rated & tested by our team

"The vividly-designed Casushi site makes playing the broad collection of games easy"
Play Slots
800+
No
No
14
New Customer Offer 100% bonus on first deposit up to £50 & 50 Bonus Spins (30 spins on day 1, 10 on day 2, 10 on day 3) for Rich Wilde and the Book of Dead slot only. Min first deposit of £10. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
Highly Trusted 2. All British Casino
79%
100% up to £100 + 10% cashback

Reviewed, rated & tested by our team

"Withdrawals are processed within 48 hours while a collection of well-thought out games makes All British Casino a great place to play"
Play Slots
1100
No
No
75+
New Customer Offer 100% up to £100 + 10% cashback. Maximum withdrawal on free spins of £100. Max £5 bet while playing with bonus funds, no maximum withdrawal. 35x wagering. Skrill and Neteller deposits don't qualify for this bonus. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
3. Grosvenor
80%
Deposit £20, Play With £50

Reviewed, rated & tested by our team

"Excellent customer service and communication with the casino while withdrawals can be processed in just 24 hours "
Play Slots
600+
Yes
Yes
105+
New Customer Offer Offers available on 1st deposit only. Max reward of £50 bonus. 5x wagering. Some games have different wagering contributions. Some games exclude bonus. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
4. Voodoo Dreams
89%
100% Up To £50 + 50 Free Spins

Reviewed & verified by our team

"Earn experience points and spirit points when you play at this new casino to receive a variety of unique awards"
Play Slots
1000
No
No
40+
New Customer Offer 18+ new players only. Maximum £50 bonus. Minimum deposit: £20. Max bet with active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Winnings from Free Spins come as cash. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. www.begambleaware.org For full bonus terms and conditions, please read below. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
5. Race Casino
70%
100% up to £100

Reviewed & verified by our team

"Play on over 1500 games at one of the newest casinos out there"
Play Slots
1100
No
No
115
New Customer Offer Min deposit £20. Wagering 40x bonus. Max bet £5 with bonus funds. 100% bonus up to £100. Eligibility is restricted for suspected abuse. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
6. The Sun Vegas
80%
100% up to £300

Reviewed, rated & tested by our team

"The generous welcome offer available at The Sun Vegas will get you off to a solid start at this great casino"
Play Slots
500+
No
No
20+
New Customer Offer 100% up to £300. £10 minimum deposit. 50x wagering applies. Play on selected slots only. Bonus accepted within 72 hours and valid for 30 days. Deposits made with Neteller and Skrill are not valid for this promotion 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
7. Mr Q
71%
Deposit £10, get 30 free spins

Reviewed, rated & tested by our team

"Mr Q offers players some fantastic customer support in the shape of responsive email and live chat services "
Play Slots
100+
No
No
New Customer Offer Deposit £10 get 30 free spins. Deposit and play with £10. Only available on first deposit. Max 30 spins on VALHALLA at 25p per spin. Spins credited upon spend of £10. Use code V30. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
8. Rialto Casino
82%
100% up to £100 + 100 free spins

Reviewed, rated & tested by our team

"There are over 400 slots to choose from at Rialto Casino alongside withdrawals processed within 24 hours"
Play Slots
400+
No
No
35+
New Customer Offer New players only. Min deposit £20, Max bonus £100. 50x WR, 100 Free Spins - 10 batches of 10 Free Spins Daily - No WR - Max Win £10 per batch. T&Cs Apply 18+ 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
Great on Mobile 9. Bet Regal
80%
100% up to £50

Reviewed & verified by our team

"Comprehensive online casino experience with Royal Flush of verticals and slots titles"
Play Slots
400+
No
No
20+
New Customer Offer 100% up to £50. £10 minimum deposit. Max bonus of £50. 35x wagering requirement. Bonus expires 21 days from issue. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
10. Playzee
86%
100% up to £300 + 100 spins

Reviewed, rated & tested by our team

"Incredibly quick withdraw process, took less than 20 seconds. Lots of deposit options available too."
Play Slots
800+
No
No
25+
New Customer Offer 100% of first deposit up to £300 + 100 Zee Spins on Starburst + 500 Loyalty (Zee) Points. Minimum deposit of £20 is required. Minimum withdrawal from cash funds is £10. 10 spins credited per day, use on that day only and capped at £50. 35x wagering. Bonus funds must be used within 30 days. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org
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🥇 Best Overall Score:
89%
🎁 Largest Bonus Offer:
£300
💰 Highest Deposit Match:
100%
💷 Minimum Deposit:
£10
Operatro Finder
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Our Best Choice For Slots
Casushi
Casushi
Our score: 72%
100% Up To £50 + 50 Free Spins
New Customer Offer 100% bonus on first deposit up to £50 & 50 Bonus Spins (30 spins on day 1, 10 on day 2, 10 on day 3) for Rich Wilde and the Book of Dead slot only. Min first deposit of £10. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org

Getting Started

How to Start Playing Slots Online

Pretty much every online casino site boasts a range of top slot games for players to enjoy. This means slots fans are spoilt for choice when it comes to picking the best site. You’ll need to be clued in on exactly what a site has to offer before you sign up to start playing. Luckily for you, Compare.bet has everything you need to know about playing slots online, from the very basics of how slots work, to claiming a bonus at online slot sites.

You can start playing online slots in just a few simple steps:

  1. Compare slot sites

    You won’t be hard pressed to find an online casino with slots, but it’s not as simple as signing up to the first site. From sign up bonuses to banking options and the titles on offer, there are a few factors to consider. We’ve made this easy, sifting through the slot sites on the market to bring you a list of only the very best.
  2. Sign up & verify your account

    Settled on a slot site? Time to sign up. The link on our list will take you straight to the registration page where you can create your account. You’ll need to wait for the casino to verify your identity before you can play.
  3. compare gambling sites

    Deposit

    You’ll need to make a deposit to play real money games. Head to the cashier, select your deposit option and deposit amount and confirm. The very best slot sites offer instant deposits, so you can start playing in next to no time.
  4. Play

    Now for the fun part! With the money in your casino wallet, you’re ready to play. Choose a game that suits your budget, make your bet and hit spin. Fingers crossed!

How Slots Work

How Online Slots Work

Unlike other casino games, such as blackjack and poker, playing slots online involves little skill. Luck alone determines whether or not you’ll hit a winning symbol combination when the reels stop spinning. Whichever symbols appear on the reals are determined by a random number generator (RNG), ensuring that the outcome of every spin is random and, as a result, fair. Under the Licensing Conditions and Codes of Practices set by the UK Gambling Commission (UKGC), every UK-licensed casino must use this technology on all games.

This RNG technology determines which symbol will show on each reel at the end of the spin. The outcome of every spin is separate from the previous and next spin, which means you’re never ‘due’ a win. Likewise, if a slot has just paid out the jackpot prize, there’s no saying it won’t pay out again on the next spin.

Certain online slots have an ‘autospin’ feature, which allows you to set your wager for a specified number of spins until you’ve spent the assigned credit.

How Online Slots Work

How to Play Online Slots

Slots are about as simple as it gets when it comes to online casino games – just set your bet, hit the spin button and wait to see if you get lucky. Even if you’re playing one of the latest video slots with multiple paylines and bonus features, the basic premise is the same. Sure, you might need to set your coin size and select the number of paylines you want to bet on, but that’s pretty straight forward too.

The more paylines you bet on, the more ground you cover. Just remember that your bet will multiply by the number of paylines you bet on, increasing your overall wager for that spin.

If you do land a combination of winning symbols, you’ll know about it. Music will play and images will appear on the screen to let you know that you’ve struck lucky. You’ll then have the option to use your winnings to play again or to keep them in your casino wallet.

  1. Set your bet and select your paylines
  2. Hit spin
  3. See if you land

Landed a win and want a fast withdrawal? E-wallets such as SkrillNeteller and PayPal are often your best bet.

Slot Games

Slots You Can Play Online

Online slots might be simple, but there’s still plenty of variety when it comes to the games on offer. Whether you’re a fan of traditional fruit-machine style slot games, or prefer all-singing, all-dancing progressive jackpot slot games, the best online slot sites have something for everyone.

Classic Slots

These slots hearken back to the days of fruit machines, though the symbols aren’t necessarily fruit, bells and lucky 7s. Most classic slot games have three or five reels, making it pretty easy to select your paylines, which are almost always in one direction. This simplicity makes them a popular choice among slots newbies.

Mega Joker is one popular classic slot, with an appearance akin to a real fruit machine.

Video Slots

Video slots tend to have more going on that classic slot games. Expect crazy themes, tailor-made soundtracks and graphics that could give some video games a run for their money. These games offer players multiple ways to win, with some titles offering over 1,000 paylines in every direction you could imagine. Video slots also tend to have more bonus rounds and in-game free spins than classic slots. Video slots are perfect for players looking to combine their love of online casino with their favourite films, TV shows and music genres, with software developers such as NetEnt and Playtech partnering with big production companies to create branded video slots.

NetEnt’s Starburst is arguably the most popular video slot of all time, owing to its simple gameplay and inclusion in free spins offers.

Penny Slots

You don’t need to be a high roller to play online slot games, thanks to penny slots. You can bet as little as 1p per spin on these titles, which is great if you want to play real money slot games but have a limited budget. But that’s not to say that penny slots are a budget option, you’ll still get high-quality graphics, top-notch soundtracks and the chance to win big.

Progressive Jackpot Slots

This is where real slots enthusiasts get excited. Whereas most slot games have a fixed prize for winners, the prizes for progressive jackpot slot games just keep growing! However, even progressive games come in different shapes and sizes. Whereas some jackpots are specific to the online casino at which you’re playing, others are pooled between different casinos sites. Whatever the nature of the progressive jackpot, the size of the prize pool increases as players wager. These jackpots have been known to hit the hundreds of thousands, with titles such as Mega Moolah and Mega Fortune making players millionaires!

Mega Moolah regularly pays out jackpots into the millions of pounds to the luckiest players.

You may need to bet the maximum coin size to be in with a chance of hitting the top jackpot prize.

In our January 2021 interview with award-winning game studio Blueprint Gaming, Jo Purvis, Director of Marketing and Relationships, spoke to us about Blueprint’s Jackpot King progressive jackpot series and why the genre is so popular.

“There’s a large segment of players that absolutely love the possibility of winning huge amounts of money from any spin. For them, it enhances the gaming experience and adds something extra to the gameplay. Jackpot King is so successful because players have the opportunity of winning some amazing prizes, but they also get to play quality games at the same time. It simply makes for an entertaining experience, and those fortunate enough to reach the Wheel King are always on the edge of their seat in anticipation of what awaits.”

Mobile Slots

Keep your Favourite Slots in Your Pocket

With so many players choosing their mobile for online gambling, slots developers create games with mobile players at the top of the priority list. This means there’s plenty of choice when it comes to mobile slot games. If the title has been built with HTML5, it’ll function identically across any device and operating system, whether you’re playing on desktop, mobile, or tablet. Furthermore, some of the best new slot games have been created especially for play on a smaller touch screen. Not only does this mean you can benefit from improved usability, but high-definition graphics too.

Every slot site on our list has a mobile-friendly website, but the best have developed native mobile casino apps for Android and iOS, which makes playing mobile slot games a breeze. Once you’ve downloaded the app, you’ll be able to sign into your casino account, ready to get from your home screen to your favourite title in just a couple of taps. As these apps are stored on the device, you’ll use less mobile data and won’t have to wait as long for pages to load. And if you’re looking to keep everything at your fingertips, pay by mobile slot sites could be a great option — you’ll only need your phone number to make a deposit.

We’ve picked out the top slot sites for playing on your mobile.

Play Ojo
Get 50 free spins, no wagering
Our score: 86%
888 Casino
100% Up to £888 +88 Free Spins
Our score: 77%
Pokerstars Casino
Spend £10, get 50 free spins
Our score: 77%
Paddypower Games
Deposit £10, get 560 + 100 free spins
Our score: 86%
Grosvenor
Deposit £20, Play With £50
Our score: 80%

Other Games

Other Games at UK Slot Sites

When you’re looking to vary it up a bit, the best UK slot providers also offer their customers a range of other games to try out. This can include table games such as blackjack, roulette and poker, in addition to a selection of live casino games. But which is best for you? Let’s break down the choices and find out.

Table Games 

Blackjack is one of the most popular table games to play at online casinos.

Table games are probably the games most people think of when they hear the word ‘casino’ and include the familiar favourites of baccarat, roulette, craps and blackjack. Baccarat and blackjack are classic card-based table games with very simple rules. Craps and roulette have more complex betting options, but you can get a handle on them fairly quickly. 

But there’s a question many people ask — how can an online casino deal cards, spin wheels or roll dice and ensure everything is fair? This is where RNGs or random number generators come in. They’re vital for the online gaming industry with all respectable online sites using them to ensure clarity and fairness. They work by replacing the manual card shuffle with a mathematical algorithm to ensure each dice roll or wheel spin is random and unpredictable. It provides the all-important chance factor with table games, ensuring gamblers feel confident that nothing is fixed. 

Live Casino

Live roulette is massively popular in the live dealer category.

Live casino games add a real spark of magic by bringing another element into your game play, streaming from studios across the world. This means you can play games with a top class live dealer from the comfort of your own home. Typically, live casinos offer the classic games you would typically find in a land-based casino. However, the content range is always growing, and has been taking inspiration from popular game shows such as Deal or No Deal. Something to be mindful of when choosing your live casino game is that while these titles are enjoyably immersive, they can sometimes require a higher minimum wager. 

Poker 

If you prefer a game requiring skill and strategy, poker might be up your street.

Poker is an iconic casino game that has developed over time to adapt to current themes and gaming trends. Typically one of the best parts of poker is watching the people around you for a tell-tale reaction, and while this may not be possible with online poker, the live dealer version provides the atmosphere of a real casino through your laptop, phone or tablet. There are many variants of online poker, including the most widely recognised Texas Hold’em, Omaha, and Seven Card Stud. Though each follows different rules, all have the aim of creating a strong hand to win the game.

Slots Bonuses

Claim Your Bonus for Online Slots

The best online slot sites reward players for choosing their site. A welcome bonus is the most common offer, but there are also other slots bonuses up for grabs through other promotions, such as happy hours and VIP rewards. You can get your hands on these bonuses at the top slot sites:

Free Spins

Free spins are the ultimate bonus for online slots. This bonus is as simple as it sounds: you can play real money slots using these tokens- no need to dip into your own wallet. Some online casinos offer a set number of spins when you make a qualifying deposit, whereas others offer free spins in relation to how much you deposit.

 

Best Free Spins Bonus
Luckster
Luckster
Our score: 84%
100% up to £200 + 100 Spins
New Customer Offer Applies only to new depositing players. Minimum deposit £10. Wagering requirement x35. Offer valid for 24hr. Free spins included 3 deposits. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org

No Deposit Free Spins

You don’t even need to make a deposit to claim a free spins no deposit bonus. Simply sign up, verify your account and opt-in. Once the free spins are credited to your account, you’ll be in with a chance of winning real money on slots, without spending a penny of your own.

Also offers 88 no deposit free spins
888 Casino
888 Casino
Our score: 77%
100% Up to £888 +88 Free Spins
New Customer Offer The following are the terms and conditions of the "The first deposit offer-100% up to £888+88 free spins " (the "Offer") for 888casino.com (the “Site”). The Offer is organized by the company defined in the User Agreement applicable to you. This offer is valid until 31.12.2023; 23:59 GMT. This promotion is applicable for new players only (you may not participate in the Offer if you have previously 888casino.com or 777.com) and is limited to one (1) person per household. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org

Matched Deposit

Matched deposit bonuses are one of the most common casino offers. You’ll receive a percentage of your first deposit as free casino credit. Percentage matched will vary between online casinos, ranging from 25% to as much as 200%, though there’s almost always a limit to how much credit you can actually claim. These bonuses are ideal if you’re interested in other casino games, besides slots. Of course, you can play slots with this credit, but you can also use it on the likes of online roulette and blackjack games.

Some online casinos spread the matched deposit bonus across your first two or three payments rather than in one lump-sum.

Best Matched Deposit Bonus
Spin Rio
Spin Rio
Our score: 83%
Up To £200 Bonus + 100 Free Spins
New Customer Offer Terms and Conditions Apply. New Players only. 18+. Min First Deposit £10. Min Second and Third deposit: 20. Wagering requirement apply 35x. Offer valid for 72hr. Spins expire after 24hr. 100 spins includes 3 deposits. 18+. Full T&Cs apply. Please gamble responsibly. begambleaware.org

No Deposit Casino Credit

These bonuses work in a similar way to matched deposit deals, but you won’t need to dip your hand into your own pocket first. Much like no deposit free spins, you have a chance to win real cash even though you’re playing for free. No deposit bonuses are usually more modest than matched deposit deals— usually £5 free no deposit at most— but you can play a whole host of casino games, including online slots, with your rewards.

Bonus Terms and Conditions

There will be terms and conditions attached to whichever online slots bonus you choose and you’ll need to factor these in when comparing bonuses. Wagering conditions apply to pretty much every offer bar no wagering bonuses, and you can’t withdraw any bonus winnings until you complete these.

On top of wagering requirements, there are also other terms to consider. Some slots bonuses may only be used for selected titles, such as the newest games. Sites may also restrict how much you can win with your bonus, how long you have to complete any wagering requirements and how much you can withdraw at once.

Here are a few of the most common T&Cs to be aware of:

  • Wagering requirements – you’ll need to meet these to withdraw the bonus and any resulting winnings
  • Time limits – bonuses expire after a given period so make sure you use them before they run out
  • Game restrictions – most free spins offers will be for a specific slot game, while matched deposits can be used on a wider choice
  • Payment exclusions – if your offer requires a deposit to claim it, make sure you use an eligible payment method; e-wallet deposits will often disqualify you from receiving a bonus
  • Winnings caps – there may be a maximum amount of money you can win from a bonus

Slots Promotions

Offers for Existing Customers

While the most generous offers are reserved for new customers and first-time depositors, the best online slots sites provide plenty to reward returning customers. You’ll often find free daily spins, cash giveaways, free spins promotions that coincide with holidays or the release of a new game, lucrative slots tournaments.

Slots tournaments, sometimes called leaderboards, don’t actually cost extra for entry. It’s simply a promotion that adds the element of competition to a game that is designed for solo gameplay.  Each online slot site will have different rules, formats and prizes but a typical tournament format will see any winnings on slot games in a pre-determined period of time converted into a point score for a leaderboard. When the event ends, the top-ranked players will win a prize in the form of bonus cash, real money, player points and in some instances some sort of exclusive gift.

Playtech is just one of the software providers that give slots players an opportunity to compete against each other for prizes. The developer partnered with Buzz Bingo to launch slot tournaments. In the partnership announcement, Playtech Casino Director, James Frendo, said:

“Tournaments offer a whole new way to engage players, as well as add an extra level of enjoyment for players at no extra cost to themselves. Also, because points are awarded based on the size of the win in proportion to the bet, players who prefer to stick to lower stakes are not disadvantaged, encouraging them to stay within their limits.”

Slots

Online slots are the most popular online casino games in the UK, attracting more players than roulette, blackjack or any other game type.

PvP Features

Player vs Player Features at Slot Sites

Some sites might offer player vs player features to add an extra layer of excitement, where you’ll compete against real people for the biggest wins. Voodoo Dreams and Duelz are two examples. In both cases, you’ll be paired up with an opponent when you play slots at the site, casting spells and dealing damage every time you win. Knock your enemy down and you’ll net bonus points and experience which can be used to unlock rewards including free spins and bonus credit. It’s a bit like a loyalty scheme — the more you play, the more you’ll benefit. Each site has their own take, so it’s important to check the FAQs so you know how to take part.

Slot tournaments are another PvP feature, although you’re not directly facing off against anyone. Rather, all players are competing to top the leaderboard for the most wins in a specific game. Place in the upper ranks when the time runs out and you could walk away with a cash prize.

Free Slot Games

Play Slots Online Without Spending a Penny

You don’t need to spend a penny to play online slots. Pretty much every slot game, with the exception of progressive jackpot titles, are available in free play mode. Free online slot games are ideal if you simply want to play slots for fun or try out a new slot game before you put real money on the line.

It was announced that from the 7th May 2019, free-to-play casino games are subject to the Gambling Commission’s new age verification rules. This means even if you’re playing demo games, you’ll need to create an account and verify your age. This is designed to protect under 18s from accessing casino-style games, a move that we of course fully support.

Of course, you can’t win real money when you play free slots, but you do get to sample all the same bonus features as real money games. Whether your title features expanding reels, walking wild symbols and scatter symbols, you get to see what all the fuss is about without dipping into your own wallet.

New Slots

Try Out the Freshest Online Slot Sites

The great thing about online slot games is that there are always new titles popping up. There’s plenty to keep online slots players entertained as multiple brand new slot games are released each month. With each new release, online slots developers wow players, be that with bigger brand partnerships, higher definition graphics or bigger progressive jackpots.

Head over to our New Slots page to find out more about the latest slot games and casinos to play at.

Buzz Slots
200 Bonus Spins
Our score: 80%
Voodoo Dreams
100% Up To £50 + 50 Free Spins
Our score: 89%
Duelz
100% up to £100 + 100 Spins
Our score: 76%
Casushi
100% Up To £50 + 50 Free Spins
Our score: 72%
Mr Q
Deposit £10, get 30 free spins
Our score: 71%
All British Casino
100% up to £100 + 10% cashback
Our score: 79%
Play Frank
100% Up To £100 + 50 Bonus Spins
Our score: 84%

High RTP Slots

Understanding High RTP Slots

It’s important to understand the return to player (RTP) percentage of a slot game before you start playing, as this gives you an idea of how much you could theoretically win. These percentages are calculated over an infinite number of spins, which means you could win more or less than this percentage of wagers during your period of play.

When it comes to RTP, the closer to 100% the better. Most online slot games have an RTP of around 90% and those over 96% RTP are generally considered high payout slots. However, some of the highest paying slots offer even higher payout percentages.

Slot Game Return to Player (RTP)
Mega Joker
99%
Jackpot 6000
98.86%
Blood Suckers
98%
Starmania
97.87%
Jackhammer II
97.1%

What is Volatility?

A level of volatility is placed on slot games as an indicator of risk, with the rankings of high, medium and low correlating to the amount you can expect to win. For example, a low volatility slot game is likely to offer regular wins but usually of smaller amounts. A high volatility slot might see bigger winners but achieved less frequently. Overall, high volatility equals higher risk and low volatility equals a lower risk. 

Because of the level of risk involved, it’s advised that you take your own personal bankroll into account when choosing between a high or low volatility slot. If your budget is smaller then you may want to stay with the lower level volatility games. You’ll find that before you start playing, the best UK slot providers will declare a game’s volatility so you can be sure it’s the right one for you.

Software Providers

Top Slot Providers

It was over two decades ago that we saw the first online slot casino. Ever since then, the number of UK slot sites has expanded, boasting a vast array of exciting and often elaborate games. Over the last few years, developers have really brought their A-game to aspects such as design, entertainment, and ease of use. With this in mind, here’s a breakdown of some of the slot providers whose wares you’ll find at the best slot sites, along with an overview of the top titles they offer to UK players.

NetEnt

Gonzo’s Quest is one of the best-known NetEnt slots, and the titular conquistador has since become the mascot of the company.

Established in Sweden in 1996 as one of the first online gambling companies, NetEnt has grown internationally to become a top iGaming provider. The company prides itself on popular innovative games and cutting edge platforms, with its repertoire including popular slots and video slots, as well as classic table games such as roulette and blackjack. One unique feature of NetEnt is its avalanche mechanic, developed back in 2010. Activated when you hit a winning combination, the mechanic makes the matched symbols disappear, with cascading symbols filling their place to potentially create new combinations and lead to more winnings. 

Top NetEnt Slots 

  • Gonzo’s Quest  – Displaying beautiful graphics, this game is based around the charismatic Gonzo, a Spanish explorer who is looking for the lost golden city of El Dorado. Offering a medium-high volatility and an RTP of 95.97%, Gonzo’s Quest was the first slot to feature NetEnt’s avalanche mechanic feature.
  • Starburst First released in 2012, this highly popular and iconic slot has five reels and three rows with ten paylines. Starburst offers a low volatility and a 96.09% RTP.
  • Silverback Gold – One of the latest games to come from NetEnt, Silverback Gold has a high volatility and an RTP of 96.11%. This game is jungle-themed and involves high and low value jungle animal symbols, free spins, and the gradual collection of tokens that transfer low value symbols into high value. 

Microgaming

Game of Thrones is one of Microgaming’s many branded slots.

Based on the Isle of Man, Microgaming was founded in 1994. It stands as one of the first online casino platform providers and creators of online casino software. Specialising in slots and boasting some of the top jackpot games around, Microgaming’s titles are available at many of the best slot sites in the UK. There are over 2,500 games integrated into its platform, so this slot provider has something for every taste.

Top Microgaming Slots

  • Mega MoolahFirst released in 2006 and holder of the world record for the highest slot payout, this game offers 5 reels and 25 paylines. It’s safari-themed with comical animals spinning along each reel. Great for playing on mobile, it holds an impressive RTP of 97%.
  • Game of Thrones 243 – Including 5 reels and 3 rows, its name points to the fact there are 243 ways to win. This is an exciting game based on the popular TV show with the highest paying symbols based on the main characters.
  • The Vault – Offering 96% RTP, a high volatility and x5000 win potential, this game is ideal for gamblers who enjoy an exciting gaming experience with dynamic graphics.

Play’n GO 

Book of Dead is frequently featured in free spins offers and is the second title in the Rich Wilde series.

Since its launch as an independent company in 2005 in Sweden, Play’n GO now has a presence at online casinos in over 25 jurisdictions internationally. Known for its state-of-the-art visuals, creative features and unique, fun game design, it caters to every player’s needs with a slot portfolio of varying volatility ranges. All games are optimised for smartphone and tablet use, meaning they are easily accessible on the go via iOS and Android devices.

Play’n GO works with a strong sense of community, holding customer safety at the heart of its work. The company even has plans to be climate neutral by 2025 and net zero by 2030.

Top Play’n GO Slots

  • Book of Dead – With a maximum win potential of x5000, this flagship game offers 5 reels and 10 paylines. It offers a free spin feature which can lead to unlimited spins, and an expanding symbols mechanic that can unleash bigger wins.
  • Honey Rush – Released in 2019, this cascading grid slot is set across four levels, each of which can be reached through winning combinations. Reach the top level and you have the chance of a x9000 payout. 
  • Animal Madness – One of the latest games from Play’n GO, this slot is perfect for newcomers with its simple and clear goals. It offers an RTP of 96.2% and a maximum win of x2250.   

Playtech

Playtech achieved huge success with its Age of the Gods franchise which now totals over 30 different games.

Playtech has created over 200 slot games since its launch in 1999. Through its pioneering casino game development, the company has evolved into the biggest online gaming software supplier. One of its latest creations is Playtech ONE, a system allowing gamblers to access any game on any platform through a single account. Playtech caters to every level of casino player, offering everything from live dealer games to the latest slot technology. Its range of slots is a huge appeal, with creative themes and even the introduction of a shared jackpot style slot game. 

Top Playtech Slots 

  • Age of the Gods – With 5 reels, 3 rows, and 20 paylines, this Ancient Greek God-themed game is a popular choice for gamblers. There’s a chance for a x10,000 payout if you consecutively reveal five of the six high-scoring God symbols.
  • Beach Life – A sunshine-themed game with 5 reels, 3 rows, and 20 paylines. Look out for the treasure chest symbols which activate the Sunken Treasure Bonus game and leave you with the opportunity to land a progressive jackpot.
  • Everybody’s Jackpot – The concept behind this popular progressive jackpot is that every player who has placed a minimum deposit in the last 24 hours will take a share of the jackpot. It offers a traditional 3-row and 3-reel appearance, with 8 permanent winlines that independently move left to right or up and down, uniquely increasing a gambler’s chances of success.  

Yggdrasil

Double Dragons is one of Yggdrasil’s most popular slots.

Yggdrasil has been winning awards ever since it debuted on the scene in 2013. In 2022, the company added to its list of gongs with the Platform Supplier of the Year accolade from the EGR Nordics Awards, and RNG Casino Provider of the Year from the Gaming Awards. Licensed in 24 jurisdictions, Yggdrasil hosts a selection of slot games that hit the highest levels of quality in artwork and design. 

Top Yggdrasil Slots 

  • Jungle Books  –  This popular game holds an RTP of 96.1% and a low volatility, and its maximum pay out is £500,000. The creativity of this game is huge, with 45 possible feature combinations. Through this game, Yggdrasil introduced Fusion Realms, a new mechanic that mixes a range of different reel structures and design features into the game.
  • Spina Colada –  A cocktail-themed slot game with a host of re-spins, multipliers, and four bonus features. The respin feature is available throughout the game. Symbols that match are frozen and the others replaced, each spinning until the right combinations are achieved. There’s also the benefit of a bonus round that guarantees a win each time.
  • Double Dragons – With 5 rows and 25 paylines, this aesthetically impressive game contains dragon’s eye symbols on the reel. If you achieve four consecutive wins, you’ll open up the Double Dragon feature, unveiling two high-stack wilds that can be up to 28 symbols long. 

How to Find the Best Slot Site

If you’re a slots fan, there are plenty of sites on offer and it's easy to pick one — just follow the steps below.

STEP 1
UKGC Licence
All our recommended slot sites are licensed by the UKGC, meaning games are regularly tested for fairness and player data is protected.
STEP 2
Review Range of Games
Some of the slot sites offer several thousands of games across every theme imaginable. Checking which developers are featured on the site is an easy way to get an idea of available games at a glance.
STEP 3
Review Slot RTPs
If you’re looking for the best payouts, you’ll want to find slots with the best RTPs. For any player, we recommend titles with an RTP of at least 96%.
STEP 4
Sign Up & Claim
If the slot site is ticking your boxes, sign up with your details and claim a welcome bonus — it’s a great way to familiarise yourself with how the site and its games work.

Responsible Gambling

Responsible Gambling at UK Slot Sites

While gambling and playing online slot games can be a great form of entertainment, it’s important to be mindful of knowing your limits and to recognise when it’s becoming a problem. 

At Compare.bet we keep responsible gambling at the forefront of everything we do, and we have a few tips that we recommend all of our users follow. 

  • Only play slots at licensed UK online casinos 
  • Set a budget and keep to your limits
  • Be mindful of why are you gambling and recognise when it’s no longer for fun 
  • Set a time limit for your play sessions
  • Never chase your losses – you can quickly find yourself in an even deeper hole, and it’s not worth the risk
  • Avoid drinking alcohol while gambling, or playing while tired or upset
  • Understand the game you’re playing before you place a wager
  • Don’t be tempted to view gambling as a way of earning money

Where To Get Help

It’s a huge step to recognise when gambling is no longer fun, or has become a problem that’s affecting other areas of your life. Thankfully in the UK, there are many fully-trained professionals working for organisations who offer support for problem gambling and addiction. If you feel it may be beneficial to seek help for yourself or someone close to you, take a look at the list below to see who may best suit your support needs. 

  • GamCarethis national charity is ideal if you need information or advice relating to problem gambling. It offers 24/7 support via web chat and hosts a National Gambling Helpline (0808 8020 133).
  • GAMSTOPthe best way to immediately control your online gambling is with GAMSTOP. Once registered with the service, you will be self-excluded from gambling websites and apps relating to companies licensed in Great Britain for a period of your choosing. 
  • www.BeGambleAware.org another great charity offering information while supporting people in making informed decisions about safer gambling.
  • Gamblers Anonymous  – locally run groups that hold regular meetings to help support those affected by problem gambling.
  • National Problem Gambling Clinicthis forms part of the National Gambling Treatment Service and is commissioned by both NHS England and GambleAware. It looks to advance and develop psychological therapies for people struggling with problem gambling.

Time to Play!

Compare Slot Sites and Sign Up

Now that we’ve taken you through the ins and outs of online slots, you’re ready to head to the casino and spin the reels! Not sure where to play? You’re sure to find your best bet from our carefully curated list of top online casinos. It’s jam-packed with casinos that offer the best slots, promotions and bonuses you’ll find online. Simply compare and sign up to claim your welcome bonus!

Top 10 Best Licensed Slots Casinos for UK Customers:

Betting Site Our Score Accepts PayPal NetEnt Slots Licence
Jackpot Village
77% No Yes UK Gambling Commission
All British Casino
79% Yes Yes UK Gambling Commission
Play Ojo
86% Yes Yes UK Gambling Commission
Playzee
86% Yes Yes UK Gambling Commission
Live Roulette
77% Yes Yes UK Gambling Commission
Genesis
89% Yes Yes UK Gambling Commission
Spin and Win
84% Yes Yes UK Gambling Commission
Kassu
83% Yes Yes UK Gambling Commission
The Sun Vegas
80% Yes No UK Gambling Commission
Fruit Kings
74% No Yes UK Gambling Commission

Your Questions Answered

Do I need an account to play free online slot games?

Yes. If you’re playing at a UK slot site, you’ll need to create an account, and have the slot site verify your identity before you can start playing. These rules apply whether you’re playing free slots or real money games, though the exact account verification process will vary between sites.

References

See our references & visit related external links

Please note that Compare.bet is not responsible for the content of third-party websites.

playtech.com – Buzz Bingo and Playtech partner to launch slot Tournaments

gamblingcommision.gov.uk – New rules to make online gambling in Britain fairer and safer

The people behind this page

Compare.bet's online gambling content experts helped write, edit and check this page:

Danielle has six years of experience writing on a wide variety of topics, including online casino, sports betting and tourism. She has a BA in French with English from King’s College.

Daniel is Head of Operations at Compare.bet. He has half a decade of experience writing on topics including sports betting, online casino and the NBA. Daniel also covers Premier League football for Compare.bet news and has interviewed Louis Saha, Richard Dunne and Gary Pallister. In his spare time, Daniel enjoys film photography and making Spotify playlists.

The following external expert(s) contributed to ensure this page provides maximum value, accuracy and insight:

Adam Dickinson
Adam has almost a decade of experience working in the gambling industry, including various content and marketing roles at the likes of PlayOJO, Betway and Entain He is currently the Head of Marketing at Arena Entertainment. Adam puts his vast experience to use as a fact checker for Compare.bet.