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Slots are the dominant genre at online casinos and not surprisingly, the focal point of attention for software developers. With a few notable exceptions, such as Evolution Gaming, most producers of casino games have slots in their portfolios. Some have dedicated extensive coverage to this genre and are famous for providing some of the best slots in the industry. While there are plenty of suppliers worth considering, these five are among the very best in this line of work. You can find a list of trusted casino websites that offer these games.

Online slots

The Best Slot Game Providers in 2021


Microgaming is a name that has become nearly synonymous with quality online casino games. Slots are their specialty and in the vast portfolio of games, players can find everything from classics to modern varieties. Since 1994 when the company was founded, it has expanded its collection with some truly memorable slots. Book of Oz, Immortal Romance, Jurassic World, Game of Thrones and plenty of other games bear the Microgaming brand, including some of the best paying progressive jackpot slots.


The Scandinavian software developer has the largest selection of online slots in the world. It has had plenty of time to expand its portfolio and never compromised quality for the sake of quantity. NetEnt is known for its themed games, including music franchises that pay tribute to iconic bands and singers. When it comes to progressive jackpots, they are also the proud holders of multiple records. Some of the biggest prizes ever won were secured by players who chose to spin the reels of their slots.


When it comes to beautiful slots, no software developer is better suited to deliver the ultimate experience. Betsoft was a pioneer in the creation of 3-D slots for online casinos and it continues to excel. Their games are among the best-looking ones in the industry while sporting the same exciting gameplay. There is more than meets the eye about their slots, as they have a high return to player and are mobile-friendly. They have fewer progressive jackpot slots but offer some of the highest RTP slots in the market.

Red Tiger Gaming

Red Tiger Gaming is a relatively new player in this highly competitive environment. Founded in 2014, the software developer already has a vast collection of slots to offer. Their games are original, have exciting mechanics and pay well, with a reasonable house edge. What makes this software developer easy to recommend is the perfect mix of high payouts and top-quality graphics. Their slots are designed and developed in HTML 5, so players enjoy the latest technologies when spinning their reels.

Play’n Go

Play’n GO is a Swedish software developer with a vast presence online and a fast-growing portfolio of games. Slots are the most numerous games in their collection and also among the most popular with casual punters. They have made a reputation for innovating the industry, by releasing new and original slots every year. Punters can try them for free in demo format before betting real money on their reels.