Online Casinos UK List 2021

Check out our featured list of the best new sites in our list of online casinos UK. Grab a new bonus and compare the best new UK online casinos at Online Casinos XYZ, the ultimate directory of online casino sites.

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Avenger Slots
United States

Welcome to Online Casinos XYZ

Online Casinos XYZ is a brand new online casino comparison site developed and launched in the summer of 2021.

We exist to bring you the biggest and the best online casino bonuses. From Free Spins and Match Deposit Bonuses, to Cashback and Loyalty Schemes, there is something for everyone. Find and compare over 150 UK online casinos, write reviews, claim bonuses, and play your favourite games right here at Online Casinos XYZ.

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Mr Play Casino
Mr Play Casino

Game Your Way at Mr. Play

Immersive Live Casino
Regular VIP Promotions
Exclusive Loyalty Club

No bonus for United States customers.

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Genesis Casino
Welcome Bonus

100% up to £100
300 Spins

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The UK’s Best Online Casinos Reviewed by You the Players

We believe that the best way to find the best new online casino sites is to listen to your fellow players. Part of the reason we created Online Casinos XYZ was so that we could bring the power into the hands of the players when it comes to rating and reviewing new gambling sites. 

At we provide casino operators with the ability to create their own casino listings complete with details about their regional availability, licences, games, and deposit methods available to players. 

Along with all the regulatory and game information, casinos are also able to add bonuses to their listings, from Welcome Bonuses for all new players to Exclusive Casino bonuses that you won’t find anywhere else. Check out the Bonuses section here at to see what’s on offer for you. 

Once listed, it’s up to you, the players to rate them based on five key criteria: 

  • Player Experience

  • Customer Service

  • Bonuses & Loyalty Offers

  • Payments Process

  • Game Selection

Take the opportunity to praise the best and brightest online casinos, or give feedback to those who fall short and fail to live up to your expectations. All the while, you’ll be helping your fellow players and together help us all find the best places to play online casino games for real money safely and securely.

New Online Casino Games

One of the most exciting things for us when we talk about the online gambling industry is the pace and speed at which the software developers move when it comes to new casino games. Developers like NetEnt, Red Tiger, Pragmatic Play, Inspired Gaming, and Microgaming are constantly at work creating new content and innovating in ways we couldn’t even imagine. 

It’s great news for casino and slots fans as it means there is an endless conveyor belt of new online casino gaming content to keep us occupied, a welcome distraction for those that are easily bored. Here at we’re teaming up with some of the best content providers in the business with integrations into our Free-to-Play online casino game system that lets our members try out the latest new titles completely free. 

To get started and test out some of the best online casino games and slot machines for free, simply create an account with us and if you’re in the UK verify yourself using our integrated Age Verification System. You must be over 18 in order to test out any of the games at our site, and we are committed to ensuring that we protect the younger generation.

If you’re a new or existing software supplier that we aren’t working with yet, Get in Touch with us today to find out how we can help you promote your new games and make them available to our members, gain new followers and build brand awareness for all of your amazing game titles.

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Play the latest online slot machines from loads of different providers for Free when you register an account at Online Casinos XYZ. Read reviews and rate games or find online casinos with your favourite games from Online Slots to Live Roulette and Blackjack casino games.

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New Casino Bonuses and Free Spins

Flick through our collection of the latest online casino bonuses including Cashback, Deposit Bonuses, No Deposit Bonuses, Free Spins and everything in between. Get a quick overview of all the wagering requirements or compare all bonuses in our complete casino bonus index.

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