10 Best Online Slots Sites for High RTP Games, Demo Play, and More

23 May 2022

10 Best Online Slots Sites for High RTP Games, Demo Play, and More

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The best online slots open worlds of entertainment and represent some of the most popular online casino games. They all involve spinning the reels, providing endless possibilities for all players. 

Advances in technology allow improvements not just in terms of gameplay but in graphics, sound effects, and overall storytelling, making slots more interesting. Bonus rounds, 3D animations, and soundtracks keep players coming back for more.

Whether you’ve been playing slots for some time or you’re just starting to explore the colorful world of slot machines, you’ll find some exciting information here that would lead you to your next favorite online slot game.

Let’s dive in!

The Best Online Slots Sites For Real Money

1. Big Spin Casino — Best Online Slots Site Overall


  • 135 slots with demo play
  • Welcome bonus up to $1,000
  • 92 3D slots with various themes
  • Weekly, monthly, and yearly slots tournaments
  • ‘How to play’ guides for slots


  • Less than 10 software providers
  • High minimum deposit

Big Spin Casino shines the spotlight on slots. Its catalog is full of exciting titles, especially those with 3D graphics. The site is an excellent place for both beginners and experienced players, with how-to guides and competitions.

Slots Variety: 4.8/5

The majority of the games at Big Spin Casino are slots. In fact, they make up 135 out of the 185 choices. It may not be the largest library of games out there but what the site lacks in terms of quantity, they make up for in the quality of online slots they offer. All of the titles are available as demo games, so you can test which ones you like without risking your money.

There’s a separate category for 3D slots, which all have attractive graphics and animations. The quality of the games and their appearance is matched by the features, including bonus rounds, multipliers, and cascading reels.

Software Providers: 4/5 

The slots in Big Spin Casino’s catalog come from eight different providers. It has partnerships with top providers like Betsoft, Concept Gaming, and Nucleus, who have produced many successful titles. The result is a slots category filled with games that have different themes and features, so you’re likely to find something to your taste.

Bonuses & Rewards: 4.2/5 

The welcome bonus from this casino is suitable for use when playing online slots. It’s a 200% deposit match up to $1,000, so it’ll give you extra in your account balance to explore the games. 

You’ll need the code BIGSPIN200 to claim, making it fairly straightforward. However, the minimum qualifying deposit of $45 is higher than other casinos. The 40x wagering requirement is pretty much industry standard so it shouldn’t be too difficult to clear. 

Misc: 4.5/5

Big Spin Casino has a functional site with bright colors that make it an attractive place to play. What impresses most is the FAQ section and the playing guides for each game, which help beginners and advanced players get to grips with the different features.

2. Super Slots — Best Online Slots Tournaments


  • 255 slots 
  • Weekly cash slots tournaments
  • Free spins promotion to explore slots
  • 6 Software providers
  • No wagering requirement for free spins 


  • Max win caps
  • Slots not divided into categories

Super Slots lives up to its name with hundreds of innovative games where you can spin the reels for fun and possibly a nice payout. The entertainment and the thrills are heightened by welcome offers, regular bonuses, and tournaments.

Slots: 4.6/5

There are 245 slots in the catalog including numerous themes, such as archeology, sea creatures, dragons, mythology, and classic fruit games. Some of the tiles have labels to indicate if the game is new, or if it has special features, as well as the name of the software provider.

While there are many gems in the collection, it would be helpful to have some subcategories for the slots to help you find what you want. However, the search function works well if there’s a specific title that you’re looking for.

Software Providers: 4.5/5

The slots at this casino come from six software providers. Some big names like Betsoft provide popular titles like Tower of Fortuna and 88 Franzy Fortune. Its games have a range of interesting features, like bonus reels, wilds, and stacked wins. 

Alongside this well-known game studio, you’ll find innovative and exciting new titles from small upcoming providers such as Dragon Gaming, Magma, Fresh Deck, and Nucleus. They mix the traditional three reels with modern graphics and slots with 262,844 ways to win, meaning you don’t have to stick to a particular format.   

Bonuses & Rewards: 4.1/5 

Super Slots is packed with different offers that go beyond the welcome bonus. You’re greeted by a welcome package spread over six deposits, where you could get up to $6,000 in bonus funds. You only need to deposit $20 to trigger the reward. It’s attached to a 35x wagering requirement and there are caps for winnings. 

If your first deposit is over $50, you might also be eligible for a free spins offer to help you explore a specific slot title. One of our favorite ways to play slots and potentially win even more is through the slot tournaments with a prize pot that goes as high as $100,000.

Misc: 4/5

The purple and gold tones of the site design are eye-catching and make it a pleasure to play at the site. It works well on smaller screens as it has been optimized for mobile play. The menu and search function are useful, but we’d like more options for browsing the games library. 

3. Ignition — Best Online Slots Software Providers


  • Slots available for practice play
  • Game descriptions and features list
  • 13 software providers
  • $1,500 casino welcome bonus


  • Limited selection of online slots
  • Deposit fees apply

Ignition is mostly popular among poker fans. However, it’s also worth considering as a top slots site. The slots site has an impressive list of software providers that help bring an exceptional level of variety to the site. 

Slots: 3.5/5

Of the casinos on our list, Ignition has the smallest selection of slots. That might mean that you eventually run out of titles to keep you amused, but there’s undoubtedly enough variety to satisfy you for a long time.

The titles are neatly grouped into categories, like trending, newest, jackpots, and most popular. Combined with the last and most played widget, the site makes it straightforward to find the slot you want or to discover new options.  

Software Providers: 4.8/5

Despite its small selection of games, Ignition definitely knows how to bring variety to the table, with slots from 13 different software providers. There are famous names, like Real Time Gaming and Betsoft, among smaller studios, such as Radi8, Aristocrat, and Bodog. 

The casino offers games with various jackpots, a range of paylines, and features like multipliers and wilds. Each slot has its own style and distinct gameplay, so you can enjoy exploring each one.

Bonuses & Rewards: 4.4/5 

Since there are several ways to play at Ignition, the bonuses don’t really focus on slots. That doesn’t mean you can’t take advantage of what it offers, though. The welcome bonus is split between poker and casino funds. 

You can get up to $1,500 to use on slots with only a 25x wagering requirement. It’s the most reasonable on our list and means you won’t have to adjust your playing style too much. Look out for the slots tournaments that start every few hours. They’re a fun way to compete, but the prize is quite small.

Misc: 4.1/5

If you want other betting opportunities besides playing slots, Ignition is a fantastic option as it has poker, live dealer games, and virtual sports. The site is well-organized with game categories and a superb help center with all the information you could require.

4. — Best Online Slots Rewards Scheme


  • 195 slots with practice play
  • Welcome bonus over nine deposits
  • Solid MySlots reward scheme
  • 14 software providers


  • Deposit and withdrawal fees may apply
  • Not many slots or free spin bonuses is another online slots site making its appeal clear in its name. It has a wide range of titles, including jackpot games and the latest slots. It attracts players with its very generous welcome bonus package and keeps them playing with amazing promotions and bonus features.   

Slots: 4/5

The neat rows of slots titles are a welcome sight at You can sort them by newest or most popular and also use the jackpot labels to help you pick. Each title has a practice play version, so you can get used to the style and controls without risking your own money.

Once you move on to real money play, you can try looking in the jackpots section where prizes are in the hundred thousands.    

Software Providers: 4.3/5 gets its games from 14 software providers. There are plenty of exciting titles from Real Time Gaming, Spinomenal, and Rival Gaming. You’ll find party, dragon, Greek mythology, and Vegas themes.

Bonuses & Rewards: 4.1/5 

The welcome bonus at this casino will keep you going long after you sign up, as it lasts over your first nine deposits. You get a 200% match up to $1,000 for your first and 100% up to $500 for the next eight. Deposit using crypto and you’ll get a better deal which is up to $7,500. 

One of the standout features of is the MySlots reward program, where you’ll get perks just for spinning the reels. You earn points for playing, which helps you move up the levels. The levels determine the perks you get, and the points can be redeemed for cash without losing your status.

Misc: 4/5

The casino works well on smaller screens, and the majority of the games have been optimized for mobile play. It’s neatly organized, with slick menus and attractive graphics. Deposits and withdrawals might incur a fee, especially if you’re not using cryptocurrency.

5. Slots Empire — Best New Game Bonus for Online Slots


  • Over 200 slots with demo versions
  • Regular new game offer with free spins
  • No max win cap


  • Only two software providers
  • Slots not divided into categories

Slots Empire really embraces its Roman Empire theme, which you’ll notice in the graphics, promotions, games, and descriptions. While the theme helps the site stand out, it’s the content that makes the experience so entertaining.  

Slots: 4.3/5

Of the 253 games in the catalog, 208 are slots. They aren’t divided into smaller categories, so you’ll need to scroll the titles or use the search function to get what you want. There are themes and features of all kinds, including Egyptian, animals, sport, and fruit.    

There are some jackpot titles, like Jackpot Pinatas Deluxe, and many options with a win-win feature. Overall, the quality of the graphics and gameplay is great, so you’ll be entertained and have some potentially big wins. 

Software Providers: 3.6/5

Slots Empire only partners with two software providers, Real Time Gaming and Visionary iGaming. One is more well-known, so you’ll find some popular titles that you might have heard of before. Visionary iGaming is a smaller operation, which means you’ll find some games that you haven’t seen before.  

Bonuses & Rewards: 4/5 

At Slots Empire, there’s a regularly changing new game offer that gives you bonus funds and free spins for the latest title to be added to the casino. You can claim up to 100 free spins on the newest game available, which works well if you want to play a lot and get extra. This is subject to a 20x rollover requirement and is valid up to 5 times. 

Misc: 3.9/5

Slots empire works well on mobile, although it doesn’t have a dedicated app. However, access through your browser is fast and easy to use. Besides slots, there’s a small live casino section and an excellent video poker category, so you can find several sources for fun.


How We Ranked the Best Online Slots

Slots Variety

When we evaluate casinos to find the best online slots, we mostly look at the catalog and the titles on offer. We want to see a diverse selection of online slots that players can get their hands on. We’re looking for a good number of classic 3-reels, 5 reels, progressives, 3D, and other types of slots. 

Software Providers

A wide variety of slots is useless if the quality of games is disappointing. Players deserve maximum entertainment from whatever slot title they choose and it can only be possible if the games supplied to each casino come from prestigious software companies that have been proven and tested time and time again.

We’re not talking about just the big names here – although their presence is more than appreciated. We also give chances to smaller yet promising software providers to allow a more diverse games portfolio for all players.

Bonuses and Promotions

While popular slot titles, jackpots, and big-name software providers are a must, we also look at bonuses. The promotions page will show you whether the welcome package, rewards program, or regular offers will give you more to play with and if that extra value will help you explore different slot titles. 

Mobile Optimization, Site Layout, and More

Slots fans deserve an amazing gambling experience from sign-up to payout. That’s why we only considered slots sites that are well-organized, easy to navigate, with frequently added new titles, and a reliable customer support team. Slots sites with these features are likely to provide a better long-term gaming experience.  

FAQs on the Best Online Slots Sites 

Is It Possible To Play Slots for Free?

Yes, the majority of slots sites on our list, like Big Spin Casino, Ignition, and Bitstarz, offer free versions of their slots. It means you don’t even need an account to play. You can launch the demo version and play with fun money. 

There aren’t any winnings involved, so this type of access is ideal for checking out the controls, theme, and features before deciding to play with real money.

Which Are the Best Slots To Play for Real Money?

All of the slots at the sites on our list are available for real money play. Choosing the best comes down to your preferences. For example, jackpot slots give you an opportunity for a nice payout, although that isn’t handed out every day. 

Most slot sites have game descriptions that tell you about the features, such as multipliers and bonus rounds where you can win big. Some, like Wild Casino, also tell you about volatility, which can help you gauge whether a slot pays out small amounts often, or larger amounts where you have to play for longer and wait for a win. 

What Are the Best Slots Bonuses?

Free spins are one of the best ways to explore slots. Several sites on our list combine free spins with bonus funds, like Super Slots, Slots Empire, and Red Dog Casino

The spins can only be used on a specific game, but with changing promotions, you can explore new titles each month or week. What makes these slots bonuses stand out is that they often don’t have strict terms and conditions, such as those at Slots Empire with no max win cap.

What Types of Slots Are Available Online?

Jackpots and progressive jackpots – with large prize pots that can grow every time the game is played

Megaways – when there are many pay lines and often more than the standard 5×3 reels

Cascading reels – these slots keep going once the reels have stopped; if you match symbols, they disappear, and new ones take their place

3D slots – these titles have graphics and animations with another dimension so that characters and actions appear more real and the experience is immersive

Which Software Providers Are the Best?

There are several well-known providers that have a strong reputation in the industry. They include Real Time Gaming, Genesis, Betsoft, and Yggdrasil. Playing at sites that partner with these providers means you’ll be getting some of the most popular and top-quality slots. Smaller game studios can add to the experience with a different take on graphics and features. 

Related: Best online casinos

Which Other Games Are Similar to Slots?

If you like slots and want to try something that delivers a similar experience but is a bit different, there are a few options. The casinos on our best slots sites list have specialty games. The graphics and soundtracks are similar to slots, but the gameplay is different as there aren’t any reels. You can also try bingo, keno, and arcade games like Thundercrash.

Related: Best live casinos

Which Is the Best Online Slots Site?

We’ve chosen Big Spin Casino as our number one slots site. It earns that place thanks to its large catalog of 3D slots and its excellent how-to guides for playing. The slots tournaments with cash prizes that run all year are another reason why we think players will enjoy exploring their competitive side at the site.   

Related: Fast payout casinos

Comparison of the Top Online Slot Sites

Big Spin Casino: Great selection of online slots from well-known software providers, generous welcome bonus with industry-standard wagering requirements, fun casino theme with bold colors, smooth mobile gameplay for players who play slots on the go

Superslots: Good number of online slots available with top-quality gameplay courtesy of major software providers, very compelling welcome bonus package especially for crypto players, simple and straightforward layout with sharp graphics across the site

Ignition: Ideal destination for slots and poker fans, a limited selection of slot titles but guaranteed high-quality slots from big wig software providers, attractive welcome bonus divided into casino and poker sections, low wagering requirements Mainly a slots site with titles from popular and less mainstream game providers, decent welcome bonus with reasonable wagering requirements, great contrast of simple and minimalistic site background with bold and ultra-sharp graphics from game thumbnails

Slots Empire: Decent online casino library with a good selection of online slots, a limited number of software providers supplying their games, reasonable welcome package with generous free spins added, fun and exciting Roman-themed casino

Related: Best online casino games

How To Get Started at the Top Online Slots Sites

If you checked a few online slots on free play mode and you’re ready to start playing with real money, signing up for your chosen slots site is necessary. The procedure is pretty much similar for the best slots sites with slight variations on the information you need to provide. 

1. Register

Visit your chosen casino by clicking the link. The sign-up screen should launch automatically. If not, click the ‘join’ button to start the process. It will open a form where you need to add your personal details, including your name, address, phone number, email address, and date of birth. 

2. Verify your account

In order to use your account, you will need to confirm your email address by clicking a link in an email sent to you by the casino. You might also need to provide proof of your identity by uploading some form of government ID or proof of address.

3. Deposit and play

Now that your account is ready, you can claim your welcome bonus. Check whether you need to opt-in, add a bonus code, or contact customer support to claim. Your next step is to make a qualifying deposit, and then you’re ready to play.

Ready To Start Enjoying the Best Online Slots?

Slots are one of the most popular casino games as they offer thrills, variety, and exciting game features that can be played with bonus funds and free spins. 

To sum up our recommendation, the best online slots site you can join is Big Spin Casino. It delivers entertainment and value through its 3D slots and weekly cash prize tournaments. Superslots and Ignition are pretty close runners-up. And if you’ve got more time to explore, feel free to check out the rest of the sites on the list.

Just make sure that no matter which slots site you end up playing at, you should always gamble responsibly. Have fun!


DISCLAIMER: You probably don’t need us to tell you that any form of gambling comes with risks and should not be undertaken as a solution to solve your financial troubles. It’s worth remembering the phrase…the house always wins!

If you suffer from a gambling problem or suspect somebody you know does, then we strongly suggest that you call the National Problem Gambling Hotline at 1-800-522-4700 to talk with an advisor for help and to make gambling safer for you or your loved ones.  Remember all gambling sites and guides are 21+ only.

Casino sites listed on our site may not be available in your region. Check your local laws to ensure online gambling is available and legal where you live.  Our reviews are independent and reader-supported and we may receive commissions for recommendations made in our websites guides, this does not affect our rankings methodology and we always recommend sites we believe will provide the most enjoyable gaming experience.

Visit these organizations for free gambling addiction resources: