cos-logo

Welcome to Compare Casino Sites...

The number one comparison site for online slots and casinos. We have been reviewing online slots and casinos for over a decade and have created this site to bring you the best casinos, the best offers and of course the very best slots.
Start comparing and start playing today!

Site of the month

BetVictor Casino

BetVictor Casino

Wager £10 for 200 bonus spins on Big Bass Bonanza.  

18+ new customers only. Opt in, deposit and wager £10 on selected games within 7 days of opening new account. Get 200 Free Spins on Big Bass Bonanza, no wagering.Free Spins Expire in 7 days. Card payments only. T&Cs Apply, see below. begambleaware.org | Please Gamble Responsibly.

Offer of the month

Electric Spins

Electric Spins

Deposit £5 get 100% up to £30 & 50 Free Spins  

First-time depositors only (18+ country restrictions apply). Min deposit: £5. Max offer: 100% Games Bonus up to £30 & 50 Free Spins (on a game of our choice). Promo code: NEW5. Any Games Bonus winnings, if applicable, must be wagered 60x before withdrawal. Any Free Spins winnings, if applicable, will be credited as bonus funds and capped at £5.00. FS are valid for 7 days and any winnings must be wagered 40x before withdrawal. Games Bonus win cap: £100 + original bonus amount. Wagering contribution varies 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 31/12/2022

Top Sites

SpinYoo Casino

100% First deposit bonus up to £250 + 100 bonus spins.  

Full review

18+. New players only. Min Dep £20. Max Bonus Bet £5. Offer: 100% of 1st deposit up to £250 + 100 Yoo Spins on Starburst, Book of Dead, Fire Joker, Gonzo's Quest, & Big Bass Bonanza respectively (first 20 credited on 1st deposit; rest credited at 07:00GMT at 20/day). Spins expire after 23:59GMT on day they’re credited. Winnings from each 20 spins capped at £50 & credited as bonus. Bonus funds expire after 30 days, are separate to Cash funds, & subject to 35x wagering of bonus + deposit amounts. Only bonus funds contribute to wagering requirements. Bonus funds can only be used on slots. Full Terms Apply. Play responsibly. BeGambleAware.org

Mr Green UK Casino

Get 50 Free Spins When You Sign Up T&C's Apply.  

Full review

18+. Play Safe. New UK customers only. Opt-in required. 1x per customer. Free spins on Lucky Mr Green only. Max. 50 free spins at £0.10/spin with 35x wagering. Spins expire 72 hours from issue. Game, country, currency, player restrictions and terms apply.

William Hill Casino

Deposit £10 get a £50 bonus.  

Full review

+18. Play Safe. New customers only. Opt in required. First deposit of £10 only. Selected Megaways slots only. Max £50 bonus. 30x wagering requirement. Max redeemable £1,000. Bonus expires 72 hours after issue. Eligibility rules, game, location, currency, payment-method restrictions, stake contributions and terms and conditions apply.

Paddy Power Casino

Deposit £10 play with £60 + 20 bonus spins. (18+ only, T&Cs apply, please gamble responsibly).   

Full review

UK & IRL only. Deposits made with e-wallets are not valid for this promo. Bonus wagering x35 on eligible games. Winnings from bonus capped at£500. Spins available after bonus is redeemed/lost. 10 per day with no wagering. Full T&Cs apply

Highway Casino

255% WELCOME BONUS AND 100 FREE SPINS ON WILD HOG LUAU  

Full review

255% Welcome Bonus is offered on your 1st and 2nd deposits and is valid for Slots, Real-Series Video Slots, Keno, Bingo, Board games. 100 Free Spins apply to Wild Hog Luau game. Min Deposit: $30 (Neosurf $10); WG: x33, max cashout: x35.

Miami Dice

Register and receive 100% first deposit up to £300 + get 50 bonus spins on any NetEnt slot game.  

Full review

18+. New players only. One bonus offer per player. Minimum deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. Bonus funds are 100% match up to £300 on your 1st deposit, 50% match up to £500 on your 2nd deposit, and 75% match up to £500 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus, cash & bonus spins. Terms apply. BeGambleAware.

Amber Spins

200% Bonus & 50 Free Spins  

Full review

First-time depositors only (18+ country restrictions apply). Min deposit: £10. Max offer: 200% Bonus up to £20 Games Bonus & 50 Free Spins (on Starburst). 10 Free Spins will be credited per day, across 5 days. Promo code: SLOTS50. Any Games Bonus winnings, if applicable, must be wagered 60x before withdrawal. FS are valid for 7 days and any winnings must be wagered 99x before withdrawal. Games Bonus win cap: £100 + original bonus amount. Wagering contribution varies 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 apply. Valid until 31.12.2022.

Black Magic Casino
  • 400% up to £1000
  • 18+ New Players Only. Terms Apply.

400% UP TO £1000 Deposit Code: WELCOME  

Full review

During Deposit insert on the field “Deposit Bonus Code” the following code: WELCOME. Minimum deposit amount for this bonus is 25€. Maximum given bonus is 1000€. Welcome Casino Bonus is subject to wagering requirement of 45 times.

Slots Angel

50 FREE SPINS PLUS £10 BONUS  

Full review

First-time depositors only (18+ country restrictions apply). Min deposit: £10. Max offer: 100% Bonus up to £10 Games Bonus & 50 Free Spins (on Starburst). 10 Free Spins will be credited per day, across 5 days. Promo code: GET50. Any Games Bonus winnings, if applicable, must be wagered 60x before withdrawal. FS are valid for 7 days and any winnings must be wagered 99x before withdrawal. Games Bonus win cap: £100 + original bonus amount. Wagering contribution varies 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 31.12.2022

Secret Slots

Deposit £5 get 100% bonus + 25 free spins use promo code: GET25   

Full review

First-time depositors only (18+ country restrictions apply). Min deposit: £5. Max offer: 100% Bonus up to £5 Games Bonus & 25 Free Spins (on Starburst). 5 Free Spins will be credited per day, across 5 days. Promo code: GET25. Any Games Bonus winnings, if applicable, must be wagered 60x before withdrawal. FS are valid for 7 days and any winnings must be wagered 99x before withdrawal. Games Bonus win cap: £100 + original bonus amount. Wagering contribution varies 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 apply. Valid until 31.12.2022.

Arcade Spins

25 FREE SPINS & £5 BONUS  

Full review

First-time depositors only (18+ country restrictions apply). Min deposit: £5. Max offer: 100% Bonus up to £5 Games Bonus & 25 Free Spins (on Starburst). 5 Free Spins will be credited per day, across 5 days. Promo code: GET25. Any Games Bonus winnings, if applicable, must be wagered 60x before withdrawal. FS are valid for 7 days and any winnings must be wagered 99x before withdrawal. Games Bonus win cap: £100 + original bonus amount. Wagering contribution varies 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 apply. Valid until 31.12.2022.

Slots Dreamer
  • 400% up to £1200
  • 18+ New Players Only. Terms Apply.

400% first deposit bonus up to £1200  

Full review

Minimum deposit amount for this bonus is £/$/€25 Maximum given bonus is £/$/€1200 Welcome Casino Bonus can be used on slots and only on the following Provider: Egt, Netent, Novomatic, Play n go, Pragmatic, Amatic. This Bonus cannot be used in conjunction with any other promotion. Bonus amount is subject to a wagering requirement of forty-five (45x) times.

True Fortune Casino

Register and deposit for up to €2000 welcome bonus. T&C's Apply.  

Full review

Minimum wagering: 35x times playthrough on deposit + bonus Excluded country list casino players: Canada, Israel, Costa Rica, Excluded country list using deposit bonuses: Bulgaria, Costa Rica, Georgia, Latvia, Russia, Ukraine. Min Deposit: €/$ 25 Max Deposit: €/$ 375 Players must meet the wagering requirements before they can cash out. This bonus cannot be used to play table and card games or video poker and slot progressive games.

New Slots

ONLINE CASINO SITES 2021

Year after year, online casino sites are the place of choice for players. The accessibility and access to the vast number of games help boost its popularity. In 2017, the gambling commission reported 34% of players decided to play at an online casino instead of going to a land-based casino or bookies, which was an increase from 2016.

A contributing factor to online casino sites growing in popularity is that they can offer higher payback percentages or RTP (Return to player). Online casino sites usually offer 94.5% and above RTP percentages. At traditional land-based casinos, the RTP can be as low as 70%. In layman’s terms, this means you have a higher chance of winning. In theory and I really do mean in theory here, if the RTP is 95%, for every £1 you deposit you’re likely to receive £0.95p. Since all online casino sites are programmed using a random number generator, outcomes are entirely random and unpredictable.

NEW CASINO SITES

There are on average 10-15 new casino sites popping up a month and I can tell you around half of those online casinos will have closed after 18 months. Unlike other comparison sites that throw anyone up on-site, we delve into the background of the new casino sites. We know who’s behind the casino site and we know their company history too.

So if anyone has a bad reputation within the industry and tries to disguise this with a new casino site, they won’t appear here. We won’t put any untrustworthy sites on here. That means on average we add approximately 5 new casino sites a month but this varies from month to month. We look for new casino sites with a solid reputation, a fantastic site, and great customer service.

MOBILE CASINO SITES

Online casino sites have also improved their software and technology along the way making everyone’s mobile playing experience an enjoyable one.

As our mobile devices become more sophisticated, it means playing online is just as good mobile as it is on desktop. Desktop remains the number one device to play on but expect this to change by late 2018. Currently, 49% of players visit casino sites on their desktop and according to the gambling commission, this is a huge 10% increase on the previous year. So this time next year, we can safely say over 50% of all online players will play on a mobile casino site.

Convenience is probably the number one factor for the rise of players playing at online casino sites on their mobile phones. The ability to play anywhere at any time is just amazing. Here’s an interesting fact for you, the number of those playing in the morning during their commute is on the rise. This time of the day also seems to be lucky when winning progressive jackpots.

COMPARE CASINO SITES

There are hundreds of casino sites around and with over 10 casino sites popping up every month, the choice is endless. It has been revealed that the average player is a member of 4 online casino sites in the UK. At comparecasinosites.com we have recognised this since day one and therefore we deliver a broad range of casinos to suit all of your player needs.

In 2021, there are a few things that come as standard at an online casino site, such as high levels of security, integrity, and confidentiality. Then the things which may differ from casino to casino we go through rigorously before featuring them here.

We start off by finding out who’s behind the casino to ensure they have a solid reputation and company ethics. Then we go through the player journey of signing up and verifying our account. We also ask a few questions to the customer support team to see how quickly they respond and the manner in which they respond to us.

Once we’re a fully-fledged member of the online casino we go through the site taking note of its navigation, ease of use, features, and accessibility to useful areas. For instance, casino sites with a search bar are always a winner. We really do go through everything, from the game selection, welcome bonuses, ongoing offers, and languages available.

You may find you love a particular casino for its roulette games for instance, but prefer another for its vast selection of slots. This is common among savvy casino players and that’s why our online casino reviews are detailed with a summary section too, highlighting all the important bits.

We always show you a wide variety of online casino sites so you can choose your favourites. We vet all of the online casino sites we featured on here, so you can happily choose your casino site.

WHAT TO EXPECT FROM ONLINE CASINOS IN 2021

Online casino sites are ever-changing and it’s our job to keep you up to date. In 2021, we have more fantastic games and user-friendly casinos. There are also a multitude of regulations to stay on top of, set by the Gambling Commission.

The biggest factor for online casinos is the mobile movement, mobile devices are simply revolutionising the industry. We all love playing on our mobile devices and casino sites need to stay up to date. As mobile device technology improves so does our player experience. So in 2021, expect more casinos to be purely mobile optimised and those that aren’t to vanish into oblivion.

Another factor we’re faced with in 2021 is online casino bonuses. Once upon a time, we all played with huge generous bonuses offered by casino sites. This is becoming rarer because the Gambling Commission has made casino bonuses taxable payable by the casino. This means for players in the UK big bonuses will just diminish. We won’t be seeing many welcome bonuses around the 500% mark but more around the 200% mark.

On the back of this, in 2021 we are seeing an abundance of welcome package offers. It’s common to see a player’s first three deposits receive a bonus. The package is usually made up of three smaller deposit bonuses and packaged into one. This is a great method since you can experience a new casino in different sessions and can make a solid decision about your entire player experience.

HOW TO PLAY AT ONLINE CASINO SITES

In all instances, you will have to register at the casino site with your details such as name, address, date of birth, etc. Don’t forget to confirm your email address too.

If you’ve played at a land-based casino in the past then you’ll quickly realise the games are pretty much the same and played in the same way. If you’re a newbie to casinos as a whole and unsure of anything then you can contact 24/7 customer service. Overall, online casino sites are easy to play at, you just select the game you want, choose your stake or betting amount and you’re away.

You will need your banking details or Paypal details to hand to make a deposit. Once you’ve done this once you usually have the option to store your details to save you from re-entering your details every time you want to make a deposit.

When it comes to confirming your account and identity it’s highly likely you will have to prove ID and/or a household bill with your name and address on it. You will have to scan this into the casino sites.