In 2021, more of us are playing online slots than ever before. In the US alone, online casino gaming is a $2 billion a year industry, according to globalnewswire.com, an all-time high that is expected to grow substantially in the years to come. There are many factors that explain the astonishing rise of online slots in America in recent years.

Improving technology has made a more comprehensive range of games more accessible than ever before. The growth of the industry has facilitated the rise of hotshot slot developers that are producing slots with better graphics, gameplay, and prizes than ever before. Mobile-friendly providers are allowing us to play our favorite slot games on the go, no matter where we are. All of this means that competition for customers is fierce and is intensifying by the day.

In this context, how can we decide for ourselves which US slot sites offer the best gaming experiences and value for money? To find out for yourself, simply read this expert guide to the top-rated US slot sites in 2021.

BetMGM

According to the insider guide to the best slot sites USA, found at slots.info, BetMGM is one of their top picks for the best casino in America right now. Part of the sprawling MGM empire, which includes some of the most iconic casinos on the Las Vegas Strip, BetMGM offers more than 1000 online slots, as well as innovative in-house live casino games for you to take your pick from.

Given MGM's reputation for excellence, it should come as no surprise that the platform only offers slots from the world's most celebrated developers, including IGT, NetEnt, Konami, SG Interactive, and Barcrest. To sweeten the deal, BetMGM also offers a 100% matched deposit bonus of up to $1000 for all new players, potentially providing hours of free slot play.

Hard Rock Online

Hard Rock is the iconic brand behind Hard Rock cafes on virtually every continent, as well as land-based casinos in Vegas, Vancouver, Cincinnati, and more. It's a trustworthy, safe, and reliable online casino with a staggering array of slots in virtually every theme imaginable. The platforms also offer extensive free-to-play slots that can be accessed with dummy money with no limits.

In addition, the Hard Rock Casino Online offers social slot gaming to players anywhere in the US, where you can play with virtual tokens instead of real money and socialize with other casino members. Hard Rock is also keen to attract new customers, which is why anyone who signs up for a first-time account can enjoy a matched deposit bonus worth up to $1000 and 50 free spins on a selected slot. Not too shabby.

Borgata

Founded in 2013 and offering online casino gaming in New Jersey and Pennsylvania, Borgata has managed to make a serious splash for such a relative newcomer to the world of online gambling. There are more than 600 slots on offer, as well as popular progressive jackpot slots that frequently have six or even seven-figure grand prizes.

It's a secure slot site that has managed to attract new players with its vaunted VIP program, which allows all members to constantly accrue so-called iReward Points (iRPs) and Tier Credits (TCs), which can instantly be exchanged for free spins, gaming bonuses, or straight-up cash prizes. Borgata's welcome offer, which includes $20 cash on-the-house and a matched deposit worth up to $600, is certainly nothing to sniff at either.

888 Casino

888 Casino is one of the world's largest and most reputable casino brands, having first been founded in Gibraltar in 1997 and later floated on the prestigious London Stock Exchange in a highly-publicized IPO as detailed on haaretz.com. Today, 888 Casino is making major inroads into the American market, offering more than 900 slot games to players in Nevada, New Jersey, and Delaware.

Here you'll find iconic online slot games from developers such as Netent, PlayTech, and Yggdrasil. For new players, you can a staggering 120% matched deposit bonus worth up to $500, meaning that the casino will more than double your first deposit, which can then be used on any slots that you wish to play.

These are the top slots in the US right now. If you want variety, customer service, security, and quality gameplay, these are the sites to choose from.