Top Slots Software Providers 2024

Online casinos and slots software have come a long way.

Prior to online gaming, slots lacked imagination and there were only the traditional 3 and 5-reeled slots that have been around since the early 1900s. With the proliferation of online gambling, slot games have received a facelift and some gameplay upgrades.

The great games that exist nowadays are the product of quality software companies who have spent years developing and perfecting their slot games while innovating along the way.

Here you’ll find the names of some of those companies should you want to know more. But first, let’s take a look at some casino that have games made by these top providers.

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The following are top software providers whose games are trusted by gamers all over the globe and can be found on online casinos across the net. Follow the links if you want to learn more.

Microgaming Casinos

Microgaming Logo

Microgaming has been an industry stalwart since the very beginning. Based out of the Isle of Man, they have been making quality games since 1994, and have over 800 titles to their name. With some of the biggest jackpots around, their games are definitely worth your time.

NetEnt Casinos


Founded in 1996, NetEnt started off providing land-based casino solutions and then moved onto online casino solutions. Like Microgaming, they have become a major supplier of online games. You’ll likely find some of the games from this Swedish giant at your next visit to an online casino.

BetSoft Casinos

BetSoft logo

Another highflyer of the software provider world, Betsoft easily live up to their motto of “expect more”. Based out of Malta, Betsoft have become well-known for their 3D games, which can be found at several of our top rated casinos.


Aristocrat Technologies logo

Aristocrat traces its roots back all the way to 1953, when it started life making slot machines. From these beginnings, it has become a leader in both land-based slot titles as well as online gaming. Such is their reputation, they have been trusted with making slot games for well-known franchises, including Game of Thrones, The Walking Dead, and Big Bang Theory.

WMS Gaming

WMS Gaming logo

WMS started making slot machines in 1994 and had a long history of manufacturing pinball machines before that. This expertise helped them become a leading provider in online slot games. They pride themselves on their flat-panel designs and surround sound to immerse players in the gameplay. Find the WMS experience at a quality online casino near you.


Quickspin game developer logo

Since its formation in 2011 in Sweden, Quickspin has released 20 quality slot games which are famed for their feature rich gameplay. Their games are mainly found at European online casinos, but hunt around and you might be able to find the great games from this boutique provider at a US casino near you.

IGT Casinos

IGT games developer logo

One of the giants of gambling entertainment, IGT is one of the world’s largest manufacturers of land-based slot machines and it floated on the New York Stock Exchange and it is a component of the S&P 500. IGT have been able to translate their success with slot machines into the online market and now their games can be found at many of the best online casinos.

RealTime Gaming

RealTime gaming logo

RTG has been making quality slot machine software for PC since 1998. Originally from the US, the company has moved its headquarters to Curacao. They’ve continued to make quality games, and their top titles — such as Caesar’s Empires and Lucky 8 — can be found across the net.

Rival Slots

Rival games developer

Since its foundation in 2006, Rival Slots has gone on to produce over 200 quality online slot games. And the quality of their games has got them far. Their games can be found in over 50 online casinos and have been translated into 11 languages. Rival Slots clearly has mass appeal.

Novomatic Casinos

Novomatic group of companies developer logo

This Austrian giant has been in the gambling business since 1980 when its founder — Johan Graff — started importing Belgian pinball machines. From these beginnings, it has grown into a monolith of the gambling world, boasting revenues of $4 billion a year. Their games — like Aztec Power — are a mainstay of online and brick-and-mortar casinos alike.

Online Casinos With Top Slot Game Software

Overview of Online Slot Software & History

In the early days of online casinos, the slots were the same at both online and brick-and-mortar casinos. Traditional, simplistic games were what everyone knew and thus what everyone was comfortable with.

As time wore on, however, the online casino industry attracted an entirely new, younger audience. This younger audience was accustomed to video games and movies with special effects and insane graphics, so it should come as no surprise that slowly but surely slot games were molded to reflect this.

In no time at all, we went from traditional slot games to the types of slots that are themed after movies and TV shows. What’s more, the games themselves began to transform in such a way that playing slots was much more than spinning a reel and hoping for the best. Now there are bonus games, free spins, and all sorts of other features added to spice up the entire slot experience.

How Does Slot Game Software Work?

Before playing any slots, its useful to know how they work. There are key terms that describe the mechanics of the game. Knowing these will help you understand slots better.

Random Number Generators (RNG)

Random number generators are the systems used to generate the outcomes of spins in slot games. They produce a randomized set of numbers which determine whether a spin is a winner or not.

There are two types of RNGs:

  1. True Random Number Generators (TRNGs)
    These are actual devices that are installed into games via a USB port. These chips — used in both brick-and-mortar and online casinos — use a process to crunch a compound number and produce a random integer. Although they are physical devices, they cannot be hacked.
  2. Pseudo Random Number Generators (PRNGs)
    As the name suggest, Pseudo Random Number Generators are the software equivalent of TRNGs. These pieces of software take large number with many decimal places and use an algorithm to alter the number and produce the result of the game.

Return to Player (RTP)

The Return to Player is the amount of money that a player should expect to end up with after playing the game. This is expressed as a percentage.


For instance, if a game had an RTP of 95%. A player should expect to finish the game with 95% of the money the bet; like $95 out of $100.

The RTP can vary from as low as 80% to as high as 99%. From the player’s perspective, the higher the RTP the better.


The volatility, or variance, of a slot tells you how often you are likely to win per spin. The higher the volatility, the less likely you are to win but the bigger the payouts will be should you win. Lower volatility slots promise the opposite: more frequent but smaller payouts.

Knowing a slots volatility can help you choose which to pick depending on your strategy.

Levels of Volatility

High: Slots with high volatility are unlikely to pay out very regularly but will payout big when they do. These slots are best for those with a big bankroll as considerable time and patience can be needed.

Medium: These slots are a comfortable halfway house between high and low volatility. They balance medium risk with medium payoffs. These slots suit players with a sizeable bankroll but who do not want to run the risk of high volatility slots.

Low: Slots with low volatility are perfect for those with smaller bankrolls. They offer small, regular payouts. They are great for those with a limited bankroll or for those wanting to experience slot play with limited risk.

Common Slots Software Features

Want to be a slot expert? Here’s some more terminology you should know.

  • Autoplay
    The game will automatically make bets for you at your chosen amount until you run out of money or stop it.

  • Free Spins
    Free goes on a slot game without risking your own money.

  • Scatters
    A symbol that is effective anywhere on the screen. It does not need to be in a certain line to count towards your win.

  • Multipliers
    Multiply the amount you win. For example, a 5x multiplier will multiply your winnings by five.

  • Wild Symbols
    Wild symbols can be transferred for other symbols in order to increase your chances of winning.

  • Progressive Jackpots
    A jackpot that progressively builds until somebody wins it. Can range from a thousand dollars to six figures.

  • Fixed & Variable Paylines
    These determine how you win. To win on a fixed payline, you must win on every line. With variable paylines, you can choose which of the lines you bet on.

  • Adjacent Ways
    Slots without payline restrictions. Symbols can win anywhere on the reel. Better chance of winning.

  • Cascading Reels
    Like in Tetris, winning combinations are removed from the game. This allows new symbols to enter the screen and may unlock new winning combinations.

  • Megaways
    Rather than individual paylines, all lines and wheels are in play. This can lead to huge payouts.

Slots Software FAQs

  • You do not. You can play slots at the best online casinos without downloading anything. There are also apps for slots available in your mobile device’s app store if you want an app for your device. You can even play slots for free.

  • They do. Many of the developers listed above make both slots for online casinos as well as brick-and-mortar casinos.

  • They will. Most online casinos are optimized for mobile. There are also mobile casinos that offer mobile slots designed with mobile players specifically in mind.

  • They are. The software developers that work in the gambling industry have a long history of making quality games that have been reviewed and licensed by gambling regulators, who are responsible for making sure that games are fair. We also follow strict metrics when we review casinos for our list. You can rest assured that the games at our recommended real money online casinos are legit.