Slotsia – Best Casino Comparison Site 2021

You’ve just arrived at Slotsia – the UK’s best comparison site for online casinos. This is the place to be if you like to get the top free spins and casino bonuses. Claim an offer through Slotsia and try out the most impressive new casinos!

As a UK player, you can find plenty of casino sites to choose from. We’re players ourselves, so we know what you’re looking for, and you’ll find that our professional advice really hits the nail on the head! Our highly-rated casino recommendations all feature a large number of top casino games, spiced up with innovative gamification features and, of course, the most generous bonuses and promotions.

More than that, we provide first-hand slot reviews and gambling advice for all players. Whether you’re a first-timer who’s never dabbled in online casinos before or you’re an experienced high roller who can afford to stake big and take advantage of VIP perks, you’ll find exactly what you’re looking for at Slotsia.

What Can You Find at Slotsia?

We provide everything you need to start comparing casinos and games today. With our expert reviews and information, you can find the ultimate casino sites and bonuses to make the most out of your online gambling experience.

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Gold Cards icon Online Casino Recommendations

Before we recommend a casino to you, we evaluate it thoroughly and fairly. All of our casino reviews are honest. We’ve reviewed over 190 different UK casinos and we’re adding more every week!

Present Icon The Best Casino Bonuses

Who doesn’t love a bonus? There’s nothing more disappointing than signing up to a casino and getting a rubbish offer. Through us, you can find and claim the best bonuses, including exclusive free spins and no deposit bonuses.

Bar icon Slot Reviews

What’s popular might not necessarily be worth your time or money! Our detailed slot reviews tell you all about a game’s payout percentage (RTP), bonus features and volatility. That way, you can choose which slot to play based on facts rather than fame.

Diamond Icon The Latest Casino Sites

New casinos give out the biggest and best casino bonuses! That’s why we’re constantly finding the latest sites where you can sign up as a UK player. Thanks to us, you’ll never miss an epic new deal!

red 7 icon Casinopedia Articles

In our casino encyclopedia, we cover all sorts of topics from seasonal bonuses to game RTP, volatility and much more. Browse through our articles and become a casino expert in no time.

The Best Online Casinos

This is our current selection of the best online casinos that can be enjoyed by players located in the United Kingdom. Every single casino we recommend was thoroughly checked and evaluated by our team of professional casino connoisseurs. Take a look and find the one that suits you the most! You can click on the link to go to the casino, or read our full casino review for additional information to help you weigh up your options.

2
4/5
0 extra spins
£100 bonus
  • Welcome bonus up to £100
  • Stunning live casino options
  • Great mobile app

Full T&Cs apply. New players only across two deposits. Cash rewards have 7 days from registration to opt-in from “My Promotions” page & each with 7 days wagering. Deposit £10, £25 or £50 & wager 75x. Only cash stakes on live games qualify & wagering contributions vary. 18+ Begambleaware.org

3
4/5
100 extra spins
£0 bonus
  • 100 Free Spins on Your 1st Deposit
  • Promo code: CASINO100
  • Casino and Live Casino Races
New PokerStars Casino registered players only. 18+. Min. £10 deposit with code ‘CASINO100’, debit card only. 7-day Free Spins expiry. Free Spins valid on 7 slots only. All spins must be used before cashout allowed. Any winnings credited as cash. Full T&Cs apply. BeGambleAware.org.
4
4/5
10 extra spins
£0 bonus
  • 10 No Deposit No Wager Free Spins
  • Award-Winning Mobile Casino
Full T&Cs apply. New players only. No deposit needed. 3 days to claim & 3 day expiry. 10x free spins worth 10p. 18+ BeGambleAware.org.

Find Free Spins Bonuses

For a large choice of free spins bonuses, you’ll find no better comparison site than Slotsia. These are our favourite offers and you can claim them through the direct links, greatly simplifying your search for spins! It is a good strategy for you to visit our dedicated Free Spins page from time to time, where you can find out more about how to compare offers. Pick up hundreds of spins on your first deposit or get some no deposit spins and no wager free spins through our exclusive offers.

2
4/5
50 extra spins
£0 bonus
  • 50 spins for £10 bet
  • No wagering requirements
  • Household name
18+. New players only. £10 Min Transfer & Stake on Slots Within 7 days. Min 5 Game Rounds. Max 50 Free Spins On Selected Games, Credited Within 48 Hours of Qualifying. Free Spins Expire After 7 days. E-wallet & Pre-Paid Card Restrictions Apply. SMS Validation May Apply. Full T&Cs Apply. BeGambleAware.org.
3
4/5
20 extra spins
£25 bonus
  • 100% up to £25 + 20 Bonus Spins
  • Great selection of games
  • Multi-awarded casino
New players only. 18+. Opt-in required. Min. £10 deposit. 20 Bonus Spins on “Book of Dead” and 100% Deposit Bonus up to £25 on first deposit. 30x wagering requirement for Bonus and Bonus Spins. Game weighting applies. Max £5/spin or £0.50/line or £50/round (live casino). 30 days expiry. Full T&Cs apply. BeGambleAware.org.

Get No Deposit Offers

We know how many of you are looking for casino bonuses that you can get without having to make a deposit. We’ve found the best UK casinos that offer bonus money up to £5 or £10 free! For the slots players among you, we also know which are the best casinos that offer no deposit free spins. Here are our top no deposit offers! Read more about free casino offers right here at Slotsia. We can help you decide which offer to claim, by providing inside information on wagering requirements, max cash out and other sneaky terms and conditions that might affect your winnings.

2
5/5
100 extra spins
£1000 bonus
  • Up to 100 first deposit spins
  • Up to £1000 Welcome Bonus
18+. New players only. Up to 20 (18p) free spins (FS) on Fire and Gold at registration (Max Withdrawal £50). Up to 100 FS on first deposit, awarded in sets over 10 days. 24hr expiry. Locked to Fire and Gold. Up to £1000 deposit match on first 5 deposits. Min £10 deposit. Dep1: up to 300%, Max £50. Dep2: up to 200%, Max £100. Dep3&4: up to 100%, Max £200. Dep5: up to 50%, Max £450. Bonuses and FS winnings subject to 40x wagering requirement. Withdrawing qualifying deposit excludes player from promotion. T&Cs apply, BeGambleAware.org.
3
3/5
110 extra spins
£100 bonus
  • 30 free spins on sign up
  • Up to £100 + 30 free spins on 1st deposit
  • Nice design

Registration Offer: New UK players only. Register & get up to 30 Free Spins [FS]. 10 FS*3 over 3 days upon login. Must be claimed by 23:59 on day of grant; wins set at £3–£12 in bonus funds. Non-funded player balance capped at £100 exc. jp. wins. Welcome Offer: Min £10 deposit, get 100% Bonus (max £100) + 30 FS. Must be claimed within 7 days. Bonus wins capped at £400 exc. JP wins. General: FS valid on specific games & valid for 7 days once claimed. FS wins granted in bonus after all FS used. Bonus valid on specific games only. Wagering req. apply: 30x bonus funds (vary by game); T&Cs Apply

Discover New Casinos

Slotsia is an essential resource for every passionate casino player; we help you learn about new casinos before everyone else! We regularly report on all new developments in the iGaming scene and review new sites as soon as they are launched. Instead of looking all over the web for the presence of new casinos, you can quickly scan our list to find the latest casino bonuses. Discover more newly-launched casinos and what we think about them on our New Casinos page. Find out why these are usually some of the best sites to play at!

2
4/5
0 extra spins
£100 bonus
  • Welcome bonus up to £100
  • Stunning live casino options
  • Great mobile app

Full T&Cs apply. New players only across two deposits. Cash rewards have 7 days from registration to opt-in from “My Promotions” page & each with 7 days wagering. Deposit £10, £25 or £50 & wager 75x. Only cash stakes on live games qualify & wagering contributions vary. 18+ Begambleaware.org

3 New Casino 2021
3.5/5
25 extra spins
£0 bonus
  • Deposit £10 for 25 free spins
  • Promo code: ELECTRIC
  • Casino launched in 2021

First-time depositors only (18+ UK exc NI). Min Deposit: £10. Max Offer: 25 Free Spins [on a game of our choice]. Promo code: ELECTRIC. Free Spins Winnings will be capped at £2.50 and credited as bonus funds. 40x wagering applies to bonus funds. Games Bonus winnings are capped at £100 + original bonus amount. Games bonus funds may only be used on selected games only. Unused Free Spins expire after 7 days. Wagering requirements vary by game. We reserve the right to deny bonuses based on abusive bonus activity across sites operated by the Company. Deposit balance is available for withdrawal at any time (UK only). General withdrawal restrictions & full T&Cs apply. Valid until further notice.

Claim Exclusive Bonus Codes

At Slotsia, you can find exclusive Welcome Bonuses for new players that aren’t available anywhere else! These offers can only be redeemed with a bonus code. With your code, you can claim bonus money or free spins when you sign up and make your first deposit. See below for our top bonus code offers, and don’t forget to visit our dedicated page to find more exclusive offers and a guide on how to claim them!

2
4/5
45 extra spins
£150 bonus
  • 100% bonus on first deposit
  • 45 spins with bonus code SLOTSIA30
  • Exclusive bonus only available at Slotsia!
18+. NEW PLAYERS ONLY. T&CS APPLY. BEGAMBLEAWARE.ORG | KYC verified | Min deposit £10 | 100% bonus up to £150 + 45 Free Spins | 15 free spins on Book of Dead spin value = £0.10 + 30 Free Spins on Narcos spin value = £0.20 | Min 35x wagering | Bonus code: SLOTSIA30 | Skrill & Neteller deposits Excluded | Bonus & Free Spins Valid for 30 days | General Promotions Terms Apply
3
3.5/5
25 extra spins
£0 bonus
  • Deposit £10 for 25 Bonus Spins
  • Bonus Code: SPINZAAR
  • Over 500 slots to play
First-time depositors only (18+ UK exc NI). Min Deposit: £10. Max Offer: 25 Free Spins [on a game of our choice]. Free Spins Winnings will be capped at £2.50 and credited as bonus funds. 40x wagering applies to bonus funds. Games Bonus winnings are capped at £100 + original bonus amount. Games bonus funds may only be used on selected games only. Unused Free Spins expire after 7 days. Promo code: SPINZAAR. Odds of winning vary between players depending on gaming and deposit activity. We reserve the right to deny bonuses based on abusive bonus activity across sites operated by the Company. Deposit balance available for withdrawal at any time (UK only). General withdrawal restrictions & full T&Cs apply. Valid until further notice.

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Frequently Asked Questions

Slotsia is a secure website, and we use encryption technology to ensure your safety. When visiting us, you will see a small padlock in the address bar of your browser that confirms this. We also take steps to protect your privacy. You can read about how we process your personal data in our privacy policy.

Our casino reviews are written independently by our resident experts, who are players themselves. Our honest reviews and ratings are not influenced by the casinos in any way. When reviewing a casino, our team looks at the casino’s welcome bonuses, games, support, payments and much more before coming to a conclusion.

At Slotsia, we don’t just recommend anything because it’s available. As industry experts, we have the experience and knowledge to be able to effectively compare casinos and bonuses so that we can tell you what the best UK casinos and bonus deals are. Similarly, we know which games and game developers are worth your time. For more information, you can read our detailed reviews.

If you read one of our highly-rated slot or casino reviews and you want to try it out, you can follow the link provided to play. These are affiliate links and we may receive a small commission if you choose to use them. This helps us to stay independent and continue to offer you honest reviews of games and casinos.