Online casinos are mushrooming, and games suppliers are on an overdrive to outperform the competition. Over 70% of the games are online slots and almost all new products belong to this category. The best slots developers are those that meet the following benchmarks.

  • Variety in the slots portfolio
  • Trademark features that create USP
  • Frequent new slots releases

We acquaint you with five of the world’s best online slots developers. You cannot go wrong if you pick online casinos powered by them.

There are now over 7000 online slots


Microgaming claims to have powered the first online casino way back in 1995. Its portfolio of slot games is probably the largest. For over two decades, Microgaming has been in the forefront of slots innovation. Today it works with a group of dedicated slots studios that supply products exclusively on its Quickfire platform. These include Rabcat, Triple Edge, Just for The Win and Fortune Factory.

Some Unique Features

Networked Progressive Jackpots: Microgaming links a number of slot games to the same progressive network. This increases liquidity to the network and the jackpot rises quickly, which is great for slots players. The most popular progressive network is Mega Moolah because it guarantees a payout of a million for each hit.

Branded Slots: Microgaming gave the industry the first branded slot Tomb Raider, based on the popular video game featuring Lara Croft. Branded slots are developed under licence from brand copyright holders and carry original audio and video content. Some recent releases include Voice People and Halloween.

Animals Personified: An interesting concept found in many Microgaming slots is animals playing the roles of humans. Robin Hood Feathers of Fortune features a robin as the legendary archer, a crow as the evil Sheriff and an owl as the wise Friar Tuck.

Other Flagship Slots:

  • Immortal Romance
  • Jurassic Park
  • Break da Bank Again
  • Agent Jane Blonde Returns
  • Playboy Gold


This slots developer first launched as Net Entertainment in 1996 from Sweden. Later it abbreviated to NetEnt. The software has been licensed by multiple regulatory agencies, including the United Kingdom Gaming Commission. Better Gaming is the tagline and NetEnt has lived up to it.

Some Unique Features

Cluster Pays Structure: NetEnt broke away from the traditional reels and paylines structure with Aloha Cluster Pays. Each cell in the matrix spun independently and payouts were awarded based on clusters of like symbols. The structure was repeated in other slots later.

Branded Slots: NetEnt has also developed branded slots. Pop music fans will love the slots from the NetEnt Rocks trilogy that feature Guns & Roses, Jimi Hendrix and Motorhead. Listen to the pumping music as you spin the reels.

VR Slots: VR Slots are coming. You will need a headset of the type used in virtual games and can then enjoy a real and immersive 3D experience. NetEnt has converted some of its best titles like Gonzo’s Quest in VR format. These have been demonstrated at expos and are available at select online casinos.

Other Flagship Slots:

  • Starburst
  • Planet of the Apes
  • Narcos
  • Spinata Grande
  • Jack Hammer


With a name like Yggdrasil, your slots had better be brilliant and they are. Yggdrasil entered the online casino software market in 2013. It may fall short of the older players in quantity, but not in quality. Yggdrasil has won a number of industry awards from Rising Star in 2015 to Innovator of the Year in 2019.

Some Unique Features

Vikings Series: Yggdrasil is a tree from Norse mythology. The slots provider has built upon that theme in its trilogy of Viking Slots – Vikings Go Wild, Vikings Go Berzerk and Vikings Go To Hell. The slot games have high quality animation and fast paced action combined with innovative gaming features.

Joker Mascot: Looking more like the pop-up from Jack-in-the-box games, the Joker mascot appears in a number of Yggdrasil video slots. Some of them lead to a progressive jackpot that requires some work to win. In Joker Millions you have to land 15 jokers on the reels through re-spins.

Other Flagship Slots:

  • Golden Fish Tank
  • Jokerizer
  • Orient Express
  • Legend of the White Snake Lady
  • Fruitoids


Playtech, launched in 1996, is the world’s largest online gaming software supplier traded on the London Stock Exchange Main Market. It encompasses the entire range of online casino games, but with a focus on video slots. Playtech growth has been powered by acquisitions of slots developers like Ash Gaming, whose products now grace its portfolio.

Some Unique Features

Branded Superhero Slots: Playtech has totally cornered this market. After Marvel withdrew from gambling merchandising, Playtech entered into an agreement with DC Comics and now develops video slots based on its latest movies like Batman v Superman and Justice League.

Daily Jackpot: Playtech has launched the Sporting Legends series of slot games that include a unique feature. There is a progressive jackpot that is guaranteed to be hit every day. The slots also have a Weekly Jackpot.

Multi-player Game: Playtech is one of the few software providers that have launched multi-player slots games. Everybody’s Jackpot scores over competition because a part of the jackpot amount is shared by players that have played the slot game in the last 24 hours.

Other Flagship Slots:

  • Age of the Gods
  • Beach Life
  • Irish Luck
  • Top Gun
  • Dirty Dancing


IGT is one of the big suppliers of equipment, including slot machines, to land casinos. In 2005 it acquired the online casino games supplier Wagerworks and later merged it. IGT develops new slots for online casinos and also converts some of its best land casino slots to the online format.

Some Unique Features

Multiway Slot Games: Multiway is a unique IGT slots structure. The normal game is played with 5 reels, 4 rows and 40 paylines. You can double the bet and activate the Multiway feature. A second payout table with 1024 ways to win additionally comes to play.

Elvis Slot Games: IGT slot machines based on Elvis have been regaling players at the best land casinos for decades. You can now play Elvis A Little More Action, Elvis Multi Strike and Elvis the King at online casinos powered by IGT as well. The symbols feature iconic Elvis memorabilia and you can hear the evergreen songs when you spin the reels.

Dual Play: IGT has incorporated a unique Dual Play feature in some of its most popular slots like Da Vinci Diamonds and Siberian Storm. Dual Play offers Tumbling Reels and Tumble Thru on a structure that has two independent reel sets.

Other Flagship Slots:

  • Cleopatra Plus
  • Noah’s Ark
  • Wheel of Fortune On Tour
  • Wolf Run
  • The 50,000 Pyramid
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