Biggest Online Casinos

In the ever-evolving online gambling scene, new online casinos are continually popping up out of nowhere, giving players plenty of options to pick and choose from.

Some of these sites are amongst the biggest online casinos in the world, while others may be a little more new. So how do we decide on which are the very best? We have looked at the biggest online casinos Europe and the biggest online casinos in the United States, and have compiled a list that embodies what makes an online gambling site the very best. Check out the below list of the biggest online casinos.

  • Aleksandra Nolan
  • Updated: 16.10.2023

  • Updated: 16.10.2023

    Top Online Casinos with the most players

    Top Online Casinos with the most players


    How We Rate the Biggest Online Casinos

    How We Rate the Biggest Online Casinos

    Our team of professionals has worked around the clock by reviewing hundreds of online casino sites to bring you the best and biggest online casinos. Our recommended list of the best online casino sites comes along with a generous welcome bonus that will boost your bankroll considerably. Here are the top factors we pay attention to.

    Deposit Bonus icon

    Welcome Bonus Offer

    The welcome bonus offer is what generally greets you when you enter an online casino. It can make or break a deal. Players have no qualms about walking away from a website if the welcome bonus offer is off.

    We don’t just look at the size of the welcome bonus offer, but also at the terms and conditions to ensure that they are working as they should. Welcome bonus offers can come in various shapes and forms, including match deposit bonuses, cashback, free spins and reload bonuses.

    All of these promotions come with different wagering requirements, time validity and eligibility of games.

    Availability of Games

    The biggest online casino sites offer a massive range of gaming options. Whether you like to play online slot games, Blackjack, Video Poker, Baccarat, Roulette, Keno, Bingo, Live Casino or online scratch cards amongst others, the biggest UK online casinos will have. These games will be powered by some of the most reputable software game developers in the industry, including Netent, Pragmatic Play, Microgaming and Play’n GO amongst others.

    Casinos Canada Payment Methods

    Payment Methods

    To play for real money at the biggest UK online casinos, you would need to make a deposit and withdraw via one of the available payment methods. The biggest online casinos tend to accept a diverse range of banking methods, including bank debit and credit cards, e-wallet options such as Skrill, Neteller, PayPal, iDebit and Instadabit, prepaid vouchers such as Neosurf and Paysafecard, cryptocurrencies and bank transfers. 

    We also pay attention to the minimum and maximum deposit and withdrawal limits to ensure that they are fair and that players can cash out their winnings with ease.

    Client Support Canada Casinos

    Customer Support

    If you have an issue or a question, the recommended biggest online casinos have a customer support team that is available 24 hours a day, 7 days a week. You can generally get in touch with them via live chat, email, phone or social media.

    While some players may dismiss 24/7 customer support service, it is important that you have access to a member of the casino, regardless of the time of the day. If something goes wrong in a game or you are unable to cash out, you don’t want to have to wait around until they are next available, especially if you are playing at a casino in a different time zone.

    jackpot slot icon


    This ties into our previous point when it comes to the availability of games. The biggest online casinos like the biggest UK online casinos host a wide range of gaming options, most notably jackpots. Besides regular and fixed jackpot slot games, they usually also host progressive jackpots, such as the Mega Moolah and Wowpot game series.


    Safety and Security

    Whether we are discussing the biggest online casinos Europe or the biggest online casinos in the world, they are licensed and regulated. They also have the safest measures in place to protect you and your data-sensitive details. This includes the adoption of encryption technology and the offering of responsible gambling tools.

    Best Games at the Biggest Online Casinos

    Best Games at the Biggest Online Casinos

    When it comes to the best online casino games, the biggest online casinos have all the best options. While the availability of specific games and game types is likely to vary from one casino, you can rest assured that there is a game out there with your name on it. The best games in the industry are powered by some of the world’s leading software game developers. These include big names such as NetEnt, Microgaming, Big Time Gaming, Just for the Win, Evolution and Thunderkick amongst others.

    Here are the best games you can find at the biggest online casinos.

    slot-machine icon

    Online Slots

    Online slot games are the most popular types of gambling games available on the market. They come in different themes and are generally engaging for a number of reasons. First off, they come with different reel setups, including classic three-reelers and advanced video slots with numerous paylines and in-game features. Secondly, some games come with bountiful jackpots attached. Players have the chance to win life-changing amounts when playing such games.

    gambler with poker cards icon


    Poker has a long history that stretches back many decades. It is also a staple player-favourite at the biggest online casinos. This game is known to test the strategy of the players as well as their bluffing skills.

    There are many poker variations available on the market, including RNG and live dealer formats, including Caribbean Stud Poker, Omaha and Texas Hold’em. You can play against a software, a live dealer or other players in live poker rooms. 

    You will need a degree of skill and strategy to succeed when playing this online casino game.

    Live Roulette Casinos Canada


    Roulette is one of those exciting casino table games that are loved all over the world, especially at an online casino. This game sees the dealer spinning a silver ball within the Roulette wheel. Your main aim as a player is to correctly predict where you think the ball will come to a stop.

    Similar to Poker, Roulette is available in RNG format as well as a live dealer format. There are many game variations available, including European, American and French Roulette.

    Blackjack Online icon


    No list of games would be complete without mentioning the iconic online casino card game Blackjack. This game combines elements of skill with that of luck. Your main aim in this game is to successfully create a total hand value of 21 without exceeding it.

    The biggest online casinos offer many different versions of Blackjack, including RNG and live dealer game variations. Popular live dealer game providers such as Evolution Gaming, Pragmatic Play and Vivo Gaming all offer different variations of this game, including Free Bet Blackjack and Infinite Blackjack.

    Bacará Cassinos Online


    Baccarat is another popular card game available at the biggest online casinos. Unlike other games available at an online casino, you don’t have an active role in this game. Instead, you must correctly guess who you think will win – the player, the banker or whether it will be a tie.

    Thanks to its simplicity and elegant nature, Baccarat is widely popular, though there are very few variations of the card classic.

    Live Games icon

    Live Casino Games

    For players who are used to the brick-and-mortar experience, but want access to the convenience of an online casino, playing live dealer games is the next best thing. Here, you can pick between a wide range of gaming options, including classic card games and live game shows.

    What makes live casino games special is that they mimic the land-based experience and are played against a real-life dealer via live streaming. There are no opening or closing hours when it comes to live casino games. The games are available 24 hours a day, 7 days a week.

    Payment Methods at the Biggest Online Casinos

    Payment Methods at the Biggest Online Casinos

    Many players, give priority to the safety of payment methods. While it is easy to make a deposit, they want to make sure that their information, especially when it comes to bank card details, never falls into the wrong hands. Our recommended and licensed real money casinos also accept deposits and withdrawals in local currencies.

    Here are the best payment methods accepted at an online casino.

    Bank Debit and Credit Cards

    Visa, Mastercard and Maestro are some of the most popular payment methods around the world. They offer you a convenient and familiar way to make deposits. While some banks may restrict transactions on online gambling, very often they have no qualms with allowing gambling with your funds.

    When it comes to safety and security, deposits are processed with the aid of two-factor authentication. Even if someone had to gain access to your card details, they wouldn’t be able to get too far without two-factor authentication.


    Interac casinos is a popular Canadian payment option that is possibly one of the most reliable and fast payment methods. It allows you to transfer funds directly from your bank account to the biggest online casinos with ease.

    Skrill and Neteller

    While some people like to think of Skrill and Neteller independently of the other, they are in fact owned by the same company. They operate in a similar manner, in that they allow you to make deposits and withdrawals instantly and painlessly without having to share your bank card details with the Skrill/Neteller casino. Other popular e-wallet functions, include PayPal, MiFinity, Payz and Trustly.


    PaySafeCard is a prepaid voucher system that is available around the world. This payment method is ideal for players who want a high degree of control and who don’t want to spend more money than they want to. You can buy PaySafeCard in various denominations from retail stores. You must then input the unique 16-digit code when making a deposit. While it is great since it gives you a degree of anonymity, this payment method cannot be used for cashing out.


    The biggest online casinos accept various digital currencies these days, including Bitcoin, Bitcoin Cash, Ethereum, Litecoin and Dogecoin. Although a relatively new payment method, it gives players a high degree of privacy whilst eliminating long and drawn-out withdrawal processes.


    InstaDebit is a leading Canadian payment method that enables users to make transactions directly from their bank account.

    Pay by Phone 

    Pay by Phone services, such as Boku and Zimpler, give players the opportunity to make a deposit by paying using their mobile phone bill or prepaid balance. While it cannot be used for cashing out your winnings, it is a convenient method for depositing.

    How to find the Biggest Online Casinos

    If you want to sign up for an account at the biggest online casinos, we have got you covered. Our team at SPCasinos have scoured the internet to create a list of the best online gambling sites for players.

    These best online casino sites have got it all, including accepting deposits and withdrawals in many currencies, various payment methods, casino bonuses and promotions and a wide range of online gambling games.

    If you are ready to get started, scroll through the list and snap up an exclusive casino bonus offer here.

    Aleksandra Nolan

    Experienced online casino writer and reviewer who loves to share her knowledge and experience with others. She enjoys analyzing the latest trends in the industry and offering valuable tips to help others by having the most from betting at online casinos. She is constantly looking for new and interesting topics to write about and stays up-to-date on the latest changes in the online gambling industry.