Best Online Slots and Slot Casinos 2021 Compare top US online slots and real money slot casinos

What the Best Slot Casinos Offer

The casinos listed above are the top US-licensed slot sites available. Each has passed the Casino Cabbie review process with flying colors and also has a notable slots lobby, providing players with:

1. Hundreds of Free and Real Money Slots to Play: All of the casinos listed on this page offer hundreds of slot games to play, including classic, video, and jackpot options. Pick a casino and dive into a grand gaming lobby that is filled with fun - whether you’re betting with real money or playing for fun!
2. Varied Slots Software That Offers Different Styles of Gaming: The best US online casinos provide players with various software options from providers like NetEnt, Scientific Games, Big Time Gaming, and Yggdrasil (among others), which provides players with an exciting casino experience. Did you know that each of our casino reviews includes a breakdown of what software each casino features, the number of each type of games available, and the min/max bet per game? Find out more via our casino reviews.
3. Fantastic Welcome Offers and Regular Slot Bonuses: If you want the best experience playing slots online, then be sure to pick a listed casino that has a top-notch welcome offer and ongoing bonuses that’ll keep you spinning for less (like tournaments and free spins).

Still not sure which of our recommended online casinos to pick? Then get more info by clicking on the review, or use the total review score to highlight the best sites for slot players!

What Types of Slots Can I Play at the Casino?

Believe it or not but game makers have been hard at work making slots since the 1800s - pretty impressive, right?

Modern online slots are vastly different from the earlier, hand-operated machines of the olden days. Instead of one-armed bandits and physical reels, players now operate game software designed in studios by teams of mathematicians, storytellers, and artists (to name but a few).

The gameplay is also far more complex as the move to modern software has created limitless opportunities for game studios to innovate and create new game ideas. Don't worry, as you’ll see below, you can still find plenty of classic-styled slots to spin at the casino.

The Classics

“The Classics” refers to a genre of online slot that emulates the original slot machine style and tends to feature fewer betlines and reels (usually 3, but sometimes 5). While less betlines mean fewer ways to win the game, this slot style boasts higher symbol payouts, and due to the lower number of reels, winning hits feel more frequent creating excellent gameplay.

Video Slots

Video slots tend to focus on immersive gameplay and bonus rounds. Providing more action, more immersion, and more complex gameplay than the classics. With a larger number of reels (5+) and paylines (typically up to 9-243), video slots offer huge flexibility in approach and design, from cascading reels to re-spins, free spins, wilds, in-game bonuses, and loads more. What's more, video slots have a greater focus on the narrative, favoring themes that provide the chance to create epic backdrops and impressive graphics or animations.

Jackpot Slots

Jackpot slots can be classic, video, or new: the addition of a jackpot prize categorizes them, with the most popular type being progressives. Progressive jackpots work by adding a percentage of each player’s bet from each spin to the jackpot total; the pot is then won when a player completes the bonus round.

As progressives are extremely popular, the most played titles often award prizes worth millions of dollars. In fact, the world’s two most popular progressive slots (Mega Fortune and Mega Moolah - not available in the US) have both broken records for the largest slot payouts, totaling over $20m.

New Slots

As a category of game, new slots is vast, and it’s an all-in-one catchment term for any new slot release that delivers on innovation. Be it a new mechanic, concept, or form of bonus.

The most striking type of new slot game in the last few years is BTG’s Megaways™ (Megaways™ slots alter the number of ways to win with each spin of the reels), but it's not the only type of new slot game developed in recent years: first came 3D slots, then infireels, clusterpayz, and expanding reels (so there’re plenty of groundbreaking games to explore in this category).

How to Play and Win Online Slots

Slots are a game of luck: you spin the reels, and it’s up to the RNG (random number generator) to produce an unexpected result from the possible outcomes (which depending on the game, reels, symbols, and betlines can be a few or hundreds of thousands).

To win, players need to line up matching symbols on an active betline (some slots have fixed betlines, others allow you to decide how many to play). Players can find all game rules, including payouts and bonus symbols, in the slot game’s paytable (load up the game, locate the ‘i’ icon on the reel frame, and click it). To begin playing:

1. Once you’ve picked a game and checked the bet level and game rules, decide whether to play in real money mode or demo mode and load the appropriate version of the game.
2. Decide and adjust your bet level.
3. Click spin and see if any matching symbols line up on a betline.
4. If you hit a win, the coins will automatically be added to your balance; if you lose, your stake is deducted.
5. Spin, win and repeat.

Best Casino Bonuses for Slot Players

As the most popular type of casino game, most casino bonuses are eligible for slots play. These are some of the best casino bonuses for slot players.

Welcome Deals with Free Spins

Welcome deals are the biggest casino bonus offered to players, and the great news for slot fans is that this bonus is often twinned with free spins, so you can start spinning to win immediately!

Reload Deals

Reload deals usually offer a deposit match or free spins to players who make repeat deposits. Make the most of each deposit by playing with a site that values returning players!

Slot Tournaments

The best type of casino bonus for high-thrill slot players is, without a doubt, tournaments. Tournaments offer jackpot prizes at the cost of a set buy-in, and players compete to be the first to complete set missions and top the leaderboards. Take a look at our tournament casinos in the toplist above. You can see the number of slots featured at each casino and whether it hosts tournaments or not, plus the welcome deal on offer.

Loyalty Clubs - Heck Yes!

US Casino loyalty clubs are one of the best all-round deals for US players. You play and load up your account as usual, and as you play, you'll earn loyalty benefits and climb reward tiers.

Once you begin hitting the points threshold, you can exchange them for real-life rewards at the partner land-based (or online) casinos and resorts, in some cases around the world!

Mobile Slot Games

Mobile slots are now commonplace as more than 60% of players globally gamble from their phones. As such, all new and most older slot games are now coded in HTML5 so that players can access them on any device. Spin to win at any of the casinos listed below; each has a US-licensed mobile casino app for iOS and Android players, so you can signup and start playing in minutes.

	✓  First online casino to host live slots games ✓  488 Mobile Games ✓  iOS App ✓  Android App Hard Rock Casino Review	100% match deposit up to $1000	100% match deposit up to $1000 Take Me There hardrockcasino.com	Wagering requirements are applied to deposit+bonus and must be met within 14-days.
	✓  Play 90-ball Bingo ✓  373 Mobile Games ✓  iOS App ✓  Android App Pala Casino Review	100% match bonus up to $500	100% match bonus up to $500 Take Me There casinolobby.palacasino.com	Wagering requirements applied to deposit + bonus at x10. Players must check the GCP for this bonus as it varies with each game, not variant.
	✓  Casino and Sportsbook ✓  632 Mobile Games ✓  iOS App ✓  Android App Caesars Casino Review	100% match bonus up to $300	100% match bonus up to $300 Take Me There caesarscasino.com	To be eligible to withdraw the bonus funds players must wager the bonus x5.

Most Popular Online Slots to Spin

1. Starburst: NetEnt. RTP 96.01%
   Starburst is a legendary slot that’s been dominating the industry since its release in 2012, to the point that some experts figure that it must be one of the most spun slots of all time. Casino games don’t come more iconic than this video slot which has 5x3 reels, 10 paylines (win both ways), respins, and expanding wilds!

2. Gonzo’s Quest: NetEnt. RTP 96%
   Gonzo’s Quest is an ageless classic from NetEnt, and like Starburst, it’s one of the studio’s most popular games. Based on Gonzalo Pizarro’s tale (a famous Spanish explorer, leading exhibitions to Peru and the Amazons), the slot version follows in the explorer’s footsteps as players hunt for hidden treasures in the lost city of El Dorado. The game set up is 5x3 reels with 20 paylines and includes avalanche reels with re-spins, multipliers, and free spins.

3. Bonanza: BTG. RTP 96%
   Bonanza is a slot that shall forever go down in history as a revolutionary game: it was the first Megaways slot developed, and the first casino slot to offer hundreds of thousands of ways to win. Thanks to BTG, players can enjoy a plethora of slots with reels that are modified in-play and where each spin alters the number of symbols and ways to win, creating evermore jaw-dropping games. We won’t say much more other than this is a must-spin slot, and if you’re yet to try out a Megaways™ slot, then this is undoubtedly the title to kick-off your adventure.

4. Raging Rhino Slot: WMS. RTP 95.91%
   Raging Rhino Slot was released two years before Megaways™ was invented and at the time of its release was a trailblazing title offering 4096 ways to win (the most paylines available in 2014). Ragging Rhino is an animal-themed slot set in the heart of the African heartlands and comes with wilds, win-both-ways reels, and free spins, meaning the action feels endless. Today, players can choose between the 2014 edition or the 2020 Megaways™ remastered version; we prefer the original and highly recommend taking it for a spin.

5. Da Vinci Diamonds Slot: IGT. RTP 94.93%
   Da Vinci Diamonds is the oldest slot in this list (released in 2007) but it’s an unforgettable, arcade-style slot that players can’t stop spinning. Set on 5x3 reels, it’s based both on Da Vinic’s artwork and diamonds, and comes inclusive of tumbling reels, wilds, scatters, and free spins. Plus, the cost of a spin starts at just a cent so anyone can get in on the action!

Slots Strategy: Win More with Slots

As slots are games of chance there’s no golden winning strategy, rather, the outcome is based on luck. However, you can manage elements of how you bet and pick slots to increase your chances of winning.

Betting Strategy: Set your bet to ensure that you can spin for long enough to hit the highest paying rounds of the game. For example, video slots all come with bonus rounds, and this is where the largest payouts are: you’ll need to spin for long enough to access the bonus rounds without burning through your bankroll in several minutes.

How to Pick an Online Slot Using Stats

There are a couple of convenient statistics that players can and do use to guide them in selecting which slot games to play. These stats are better known are RTP and volatility and indicate how a slot machine pays out.

• RTP: RTP stands for Return To Player. It is the amount of total bets (100%) returned to players (as a whole). So if a slot game has an RTP of 96%, then as a TOTAL, the game returns 96% of all bets and keeps 4%. The higher a game’s RTP, the more it pays, but RTP reflects the total activity, not a single player’s experience.
• Volatility: Slot volatility indicates how often a slot machine will produce a win and the type of win. Experienced players will know well that with some slots, you feel like you’re winning, whereas with others, you’ll experience long dry patches: volatility describes this behavior. High volatility slots offer infrequent wins, but when you hit a win, it’s large. Whereas low volatility slots offer frequent low value wins, and medium volatility slots are crowd-pleasers, offering an experience between the two poles.

Using both RTP and volatility, you can select slots that payout and do so in a manner that you find most exciting: small and regular wins or infrequent, larger wins.

Highest Paying Slot Games by RTP

RTP in slot games varies with each title. Usually, providers develop games that stick to the average (between 95-96%), but that’s not always the case. If you’re looking for online slots with the highest payouts, start with these titles.

US-Licensed Slot Providers

Each game provider has its own approach to slot mechanics, payouts, and design. Click on any of the US-licensed casino game providers below to find out more about the studio, including the type of games each makes and their top titles.

Located Outside A Gambling State?

If you're living outside of NJ, PA, WV, MI, and DE, then sadly, it's not yet legal for you to play real money casino slots. But don't panic. Instead, you can signup and play free slot games at a Sweepstakes Casino.

Where Can I Find Out About the Latest Slot Releases?

Want to find out about and play the latest slot releases? Then check out the weekly Casino Cabbie Digest for all the hottest new game and industry news. As we know you guys love slots, every Friday, we published the latest news and new releases, meaning you’ll always be up to date with what’s going on and what's new to play!

January 15, 2021

Casino Cabbie Weekly Digest #20

Lauren Harrison

January 8, 2021

Casino Cabbie Weekly Digest #19

Lauren Harrison

December 24, 2020

Casino Cabbie Weekly Digest #18

Lauren Harrison

December 18, 2020

Casino Cabbie Weekly Digest: #17

Lauren Harrison

December 11, 2020

Casino Cabbie Weekly Digest: #16

Lauren Harrison

December 4, 2020

Casino Cabbie Weekly Digest: #15

Lauren Harrison

Enjoy Free Slots at Casino Cabbie

Did you know that you can play almost every casino game in demo mode? Demo mode means playing in practice mode and allows you to experience playing different slots games and testing different game providers without spending a penny. While you can’t win money either, demo mode is a great way to test drive other titles and get a feel for a game - what’s more; it’s also great fun!

Play Real Money Slots at Top USA Casinos

Ready to get in on the action and start playing the world’s most-played and celebrated casino game? Then scroll back to the slot casinos list at the top of this page and select a Cabbie verified site to play with. If you want to find out more about the casinos before joining, read the review, and don’t forget to claim a welcome bonus so you can start spinning real money slots for free!

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