While it’s the online casino brands and top real money slot sites in the USA that are up front and center in the North American iGaming market, behind each of these operators sits a rather large and complex tech stack.

This includes the technology the market-leading online slot software providers provide, which supplies your favorite games’ libraries and significantly contributes to your iGaming experience.

Of course, the best online slots for real money in the USA are described here, but in this post, I will appraise the best software providers and what sets them apart from their rivals.

#1. IGT

IGT has its roots in land-based gambling, which started in the 1950s and emerged as a public company in 1981. Make no mistake; if you’ve wagered in a brick-and-mortar casino location, you’ll have probably played or encountered an IGT slot, affording the brand a natural segue into the iGaming marketplace.

They’ve leveraged this to their advantage, creating some of the most iconic and played slots available online.

This includes the wildly popular ‘Cleopatra’ slot, which is based in Ancient Egypt and delivers one of the best specifications of any title in the market! This five-reel, 20-payline slot offers up to 180 free spins through the bonus round and regularly introduced multipliers of up to 6x your stake.

Other popular IGT slots include Da Vinci Diamonds and Pharaoh’s Fortune, which remain widely played on and offline and follow a similar gameplay structure to Cleopatra.

Overall, there are thousands of slots online at IGT, and this brand remains a staple of the iGaming industry.

#2. NetEnt

Next up is NetEnt, and while this software house may offer considerably fewer games than IGT, it has developed more than 200 immersive slots that are among the most popular in the US.

Since its inception in 1996 (around the formation of the global online gambling market), NetEnt has developed marketing leading titles and real money slots such as Starburst, Gonzo’s Quest, and Piggy Riches, while its particularly advanced tech stack has also seen the become increasingly active in the live casino vertical.

Of course, the developer’s influence and tech stack has continued to grow, particularly following the $200 million acquisition of Red Tiger Gaming in 2019.

One of the key elements of NetEnt’s games library is its ‘Touch’ technology, which ensures that all titles can be played seamlessly on tablets and smartphones (in addition to desktop devices).

By fully optimizing their games for Android and iOS devices, NetEnt’s technology was able to process a staggering 58.3 billion online gambling transactions as recently as 2019.

#3. Playtech

Formed in 1999, Playtech has developed hundreds of slots over the subsequent 24 years, including the iconic ‘Age of Gods series.

Interestingly, an overt theme of Ancient Rome runs through many of Playtech’s slots, with other popular titles including ‘Kingdoms Rise Battle Beast’ and ‘Gladiator: Road to Rome.’

The brand is also considered to be the largest publicly traded iGaming software provider and one that often makes its games available for free and in demo mode across its selection of online casinos.

Interestingly, you won’t find Playtech slots as broadly available as those developed by either IGT or NetEnt, primarily because the former is significantly more selective about who they partner with.

More specifically, they ensure that their nine studios (Playtech also owns the Quickspin and Eyecon brands) only supply licensed and regulated casinos that meet specific responsible gambling criteria.

#4. Red Tiger Gaming

While Red Tiger Gaming was only founded in 2014, this software house has made excellent progress in becoming a competitive and popular provider of online slots for real money in the USA.

A group of veterans founded the brand with years of experience in iGaming. The team included a broad mix of graphic designers, software developers, mathematicians, and psychologists. Drawing on this diverse range of experience is crucial to any successful venture, making business management considerably easier over time.

Because of this, the brand has also stolen a march on many of its rivals, already building a solid track record for supplying games to Europe and Asia.

Slots remain Red Tiger Gaming’s core focus, particularly since its acquisition by NetEnt in 2019. Hundreds of 2D and 3D slots are available at Red Tiger Gaming, including Bugsy’s Bar, Transylvania: Night of Blood, and Sheep Gone Wild.

The brand also offers slot games in a huge range of regulated markets, as it currently holds licenses in the UK, Malta, Alderney, and Gibraltar. These licenses also enable Red Tiger Gaming to enter a host of other marketplaces worldwide.

#5. Everi

I’ll close with Everi, which like IGT, has a significant affinity with the US marketplace and supplies games to both on and offline casinos.

Everi is certainly a major player online and one that’s focused on the creation of unique and cutting-edge iGaming content. Popular Everi slots include the pop-culture-inspired ‘Karate Kid’, which borrows heavily from the iconic 80s film franchise of the same name.

Developed in 2014, Everi has prioritized quality over quantity when developing its games’ library, offering a little over 40 titles to casino brands across the globe.

However, this number includes a burgeoning progressive jackpot network, which incorporates games such as Triple Jackpot Gems and Triple Wild Gems. These games pay out $15,000 or more regularly, which will likely increase as the network grows.