Best Online Slots and Casinos 2021 Compare top US online slots and casinos as well as how to play and win

What the Best Slot Casinos Offer

The casinos that have made it onto this page are the best US-licensed slot sites in your state. Each of the listed platforms has passed the Casino Cabbie review process with flying colors and has a notable slots lobby that provides players with:

• Hundreds of Free and Real Money Online Slot Games: All of the casinos listed on this page offer huge slot lobbies that include classic, video, and jackpot options. Pick a casino and dive in, playing for free or real money mode - it's up to you.
• Varied Games Software Offering Different Styles of Play: The best US online casinos provide players with various software options from leading providers likes of NetEnt, Scientific Games, Big Time Gaming, and Playtech (among others) to create an exciting and varied casino experience.
• Fantastic Welcome Offers and Regular Slot Bonuses: If you want the best experience playing slots online, then be sure to pick a 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 "Read the Review" in the toplist above, or use the total review score to highlight the best casino sites for slot players!

Did you know that each of our casino reviews includes a breakdown of what software each casino has, the number of games available (segmented by variants), and the min/max bet per game? Find out more via our casino reviews.

In Which States Can I Play Casino Slots?

If you live in the states shown below, then online real money slots are legal and you can play a US-licensed casino. Simply, select one of our sites, register, claim a welcome bonus and starting spinning to win!

What Type of Online Slot Games Can I Play at the Casino?

Believe it or not but game providers have been hard at work making slot games 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 games software created in studios by teams of mathematicians, storytellers, and artists (to name but a few).

Instead of being constricted by physical reels and slot machines, the only limit on modern slots is the developer's imagination, so the gameplay is now more complex as the move to modern software has created limitless opportunities for studios to innovate and create new slot ideas. But don't panic if you're a fan of the classic-styled slots; as you’ll see below, you can still find plenty of original-inspired slots to spin at US online casinos.

How to Play and Win Online Slots

Online slots are a game of luck: you spin the reels, and it’s up to the RNG (random number generator) to produce a random result from the possible outcomes (which depending on the game, reels, symbols, and betlines in play can number hundreds of thousands of ways to win).

To win playing slots, all you need is to line up matching symbols on an active betline (some slot games have fixed betlines, others allow you to decide how many to play). Most online slots come with around 10 symbols; each symbol has a different worth and pays a different amount depending on how many characters you match (usually, rewards are given for 3-5 symbol lines).

The rules, payouts, symbols, and ways to win differ with each game, and you can find all game rules, including payouts and bonus symbols, in the game’s paytable (load up the game, locate the ‘i’ icon on the reel frame, and click it).

To start playing:

1. Select a recommended online slot game casino from this page, signup, and claim your welcome bonus. Then head to the games lobby.
2. Pick a game and load it (you can choose to play in real money mode or demo mode at any of our top slot casinos).
3. Once the game is loaded, check the bet level and game rules.
4. Adjust your bet level, click spin and see if any matching symbols line up on a betline.
5. If you hit a win, the coins will automatically be added to your balance; if you lose, your stake is deducted.
6. Spin, win, and repeat.

How Much Does it Cost to Play Online Slots?

Every slot game has individual limits, and the price per spin depends on the number of paylines and the number of coins you want to stake per line (this makes the total bet). The range of bets that casino slots offer tends to be between $0.01-500 per spin, and the higher your bet, the higher the potential payouts. Most games have starting bets between $0.01-0.20.

Understanding Slot Game Paytables

If you're new to slot machines, it might take you a minute to decode the paytable, but all the key information regarding the game rules, payouts, and bonus rounds can be found here. Some players struggle with calculating payouts as different slot providers display this information in various ways.

How to Trigger and Beat the Bonus Round in Casino Slots

In almost all slot games (excluding classic slots), the biggest rewards are in the bonus round/s. There are several bonus round types that slot creators recycle:

Wilds (expanding wilds, sticky wilds, etc.): The main function of a wild is to act as a bonus symbol and help players form winning bet lines as this symbol can substitute for any other in the game (excluding other bonus symbols).

Depending on the game rules, wilds can come in many variations, like sticky wilds (that stay in place on new spins), expanding wilds (that grow to cover whole reels), and multiplier wilds.

Free Spins: These are the most popular type of slot bonus rounds, and are usually a feature of all video slots. Free spins are triggered by collecting scatter symbols and take place on separate reels with extra bonus features, like extra wilds or higher worth symbols.

Free spins don't cost you anything, and the bet level will be the same as the triggering spin. It's typical for slots to award anywhere between 5-100 free spins, and these can be re-triggered or not during the round.

Click and Pick Bonuses: Less frequent but highly popular are click and pick bonuses. Collect bonus symbols to fire the round, then click and pick mystery boxes or symbols for prizes, multipliers, or a jackpot.

Bonus Wheels: The bonus wheel is another type of slot bonus typical to jackpot slots, like Mega Moolah and branded titles like Wheel of Fortune. You'll earn the bonus in the base game by collecting corresponding symbols, then get a spin of the prize wheel for extra goodies or sizable payouts. You may also find bonus wheels used as a pre-bonus round to decide what type of bonus you'll get, say free spins, a multiplier, or a cash win.

As all slot games are based on luck, there's no way to beat the bonus round; the outcome depends on the luck of the draw. But, as bonus rounds have increased chances of higher-paying prizes, features, or symbols, this is the area of the game you want to get to and quickly.

To facilitate gaming on demand, some slot developers include bonus buy or feature buy buttons. Opting to buy a bonus is not available in all slots, but where it is, it can cost anywhere between 20-100x your stake, so consider the option carefully - it's not cheap.

How Much Can I Win Playing the Best Online Slots?

The exact amount you can win playing casino slots depends on the game, but generally, this type of casino game offers big payouts, which are expressed as a multiple of the total bet, say 10,000x (in recent years, these numbers have been getting higher and pushing the boundaries of betting further).

One of the top reasons players love slots is that they offer high payouts with average RTPs of 96%. Plus, they do not require skill to play, unlike table games: simply set your bet, spin, and see if you win.

In terms of bankroll management, you should note that the average spin rate for online slots is 10 per minute. Meaning at 10c per spin, you'd spend $1 a minute or $60 an hour. If a game has an average RTP and pays the average rate, you should earn $57.60 of that back, with the house earning $2.40, but as we'll explain below, slots do not pay out equally across players, and should you hit the bonus round in that hour, or multiple features, you'd stand to win more, and vice versa.

Best Online Slots Strategy to Win More

As games of chance, there’s no golden winning strategy with online slots. However, you can manage how you bet and pick titles with better payout statistics to increase your winning chances.

Bankroll Management: 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, but also have a well-set bet for when you do hit the bonus, as it's played at the same bet level, and always has more features.

How to Pick an Online Slot Using Game Statistics

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 as RTP and volatility. They indicate how a slot machine pays out and can help you understand more about a game before you play.

Slot RTP

RTP stands for Return To Player. It is the amount of total bets (100%) returned to players (as a whole) and the amount the casino keeps. If a slot game has an RTP of 96%, then as a TOTAL, the game returns 96% of all bets and keeps 4% (the house edge). The higher a game’s RTP, the more it pays, but RTP reflects the total activity, not a single player’s experience.

Slot Volatility

Slot volatility indicates roughly how often a slot machine will produce a win and is indicative of the size of the win. Experienced players will know well that with some titles you feel like you’re always winning, and others provide long dry spells: volatility describes these patterns.

• High volatility slots tend to offer infrequent wins but high-value ones.
• Low volatility slots offer frequent but lower value wins.
• And medium volatility games are crowd-pleasers, offering an experience between the two poles.

Using both RTP and volatility, you can select the best slot games that payout and do so in a manner that you find most exciting: small and regular wins or less frequent, larger wins. And of course, don't forget to take the theme, graphics and bonus rounds into account when searching for the perfect game!

Best Casino Bonuses for Slot Players

As the most popular type of casino game, most casino bonuses are eligible for online slot games. Plus, claiming casino bonuses is one of the best ways to increase your bankroll at the casino. 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 online slots for real money with no deposit.

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-around 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!

Best Mobile Slot Games

Mobile slot games are now commonplace as more than 60% of players gamble from their phones globally. 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.

4	✓  1x wagering requirements ✓  242 Mobile Games ✓  iOS App ✓  Android App BetRivers Casino Review	Welcome Offer 100% match bonus up to $250	100% match bonus up to $250 Take Me There betrivers.com
4.5	✓  Casino and sportsbook ✓  746 Mobile Games ✓  iOS App ✓  Android App Golden Nugget Casino Review	Welcome Offer 100% match bonus up to $1,000 + 200 free spins	100% match bonus up to $1,000 + 200 free spins Take Me There goldennuggetcasino.com
3	✓  Cashback on losses ✓  169 Mobile Games ✓  iOS App ✓  Android App Virgin Casino Review	Welcome Offer 100% of losses refunded up to $100 for 24 hours	100% of losses refunded up to $100 for 24 hours Take Me There virgincasino.com

Best Online Slots to Play: By Popularity.

1. Starburst: NetEnt. RTP 96.01%.

2. Gonzo’s Quest: NetEnt. RTP 96%.

3. Bonanza: Big Time Gaming. RTP 96%.

4. Raging Rhino Slot: WMS. RTP 95.91%

5. Da Vinci Diamonds Slot: IGT. RTP 94.93%.

Which Slot Machines Payout the Most?

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 that pay the most, start with these titles.

Top 10 High Paying Slots	Producer	RTP	Mix/Max Bet	Play Now
Mega Joker	NetEnt	99%	$0.10-2.00	Take Me There
Monopoly Big Event	WMS	99%	$0.20-30.00	Take Me There
1429 Uncharted Seas	Thunderkick	98.5%	$0.10-100	Take Me There
Joker Striker	Quickspin	98.11%	$0.10-10.00	Take Me There
Blood Suckers	NetEnt	98%	$0.01-50.00	Take Me There
Bob The Epic Viking Quest	NetEnt	98%	$0.01-50.00	Take Me There
Jokerize	Yggdrasil	98%	$0.01-2.00	Take Me There
White Rabbit	BTG	97.72%	$0.01-20.00	Take Me There
Esqueleto Explosivo	Thunderkick	97.6%	$0.10-100	Take Me There
Wolf Pack Payz	NextGen	97.5%	$0.01-2.00	Take Me There

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.

These site provide top-of-the-line free play slot games and tables. Our top-rated sweepstakes casino is BetRivers.Net - click the link and you'll go directly to the site where you can register and start spinning.

Where Can I Find Out About the Latest Slot Game Releases?

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

Enjoy Free Slots with 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!

Free Slots vs. Real Money Slots

Real Money Slots	Free Casino Games
Play online and win real money.	Play for free and enjoy unlimited risk-free play.
Claim casino bonuses and play more.	You don't need a bonus as you're playing for free.
Enjoy the best online games, software, and payouts of 94%+.	Play is not limited to a cash balance.
Lose real money. Play limit to bankroll.	No real money prizes are available.

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 online slots casino 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 the best real money slots for free! Or perhaps you're looking for something a little more special, then check out our best real money slot casinos for this year.

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