There is a jungle of mobile slot games available online. An infinite amount of slots offering free spins at every turn. Unlike slot machines of old, modern slots are fast, wild and vary massively. But who makes the best slot games for mobile in the UK today? What are the most popular slot games per software provider?

There are a selection of companies focused on developing games for online casinos. Some have been operating for over 20 years, and probably don’t know how many games they have. Some are new companies challenging the established brands. Most share a mutual passion for mobile and slots. Why? Because mobile casino slot games generate the most revenue - so it makes sense to invest money where the demand is.

It is no secret that some companies produce online slots of a higher calibre to their competitors. To help you select the best slots on mobile amongst so many options we have created a shortlist of casino slot providers. The following list displays the top ten mobile slot providers to watch in 2021, complete with details of their premium slots which we recommend you try for free or for real money.

Evolution Software

Evolution Gaming, which recently rebranded to Evolution ahead of its £1.6 billion merger with slot supplier NetEnt, is known for being world’s largest Live Casino gaming outfit in the industry. Live Casino equates to actual table games like Blackjack, Roulette and a variety of variations of those games performed live with studio dealers.

Evolution have also developed bespoke games like Monopoly Live which has been a huge hit with players in the UK who love the classic Monopoly board game. If you have not seen Monopoly Live yet, we highly recommend checking it out!

NetEnt Software

Netent, who for many years have been delivering awarding winning mobile online casino games with NetEnt touch technology like Starburst and Gonzo’s Quest, are now part of Evolution. NetEnt Live could never match the quality of Evolution Live casino, but what NetEnt brings to the Evolution party of dozens of award winning slots and a team of slot developers who know what the future of slots look like and how to make them fast!

The future looks bright for NetEnt. Expect more of what we know and love from NetEnt with some virtual reality/3D slots thrown into the mix too.

Red Tiger Software

Also under the rebranded Evolution is Red Tiger. The reason for this is because Red Tiger acquired by NetEnt last year for a cool £220 million. The NetEnt-RedTiger deal was one of the most trending stories in the iGaming industry during 2019. For those new to Red Tiger games, Red Tiger deliver very crisp games with emphasis on slots.

Red Tiger invented functions like local jackpots across all Red tiger games per casino. They also built different types of bonus games to maximise entertainment and deliver a slot experience of the highest quality across all devices. With NetEnt and Red Tiger under the Evolution umbrella, Evolution truly is the big casino game provider to watch.

Playtech Software

Playtech has been at the forefront of UK casino software technology since early 2000. They have a great reputation for leading from the front with new initiatives which make Playtech games stand out and extremely reliable. On mobile Playtech slots have depth and variety with sensational visuals, dazzling animations and smooth gameplay. Playtech is constantly producing new games which render a top notch playing experience. This is done by enhancing graphics and details in every slot machine game release. Most Playtech slots today are fully optimised for mobile and are compatible with smartphones and tablets operating on Android and iOS.

Playtech overall experience is impressive because they do not partner with any casino brand who wants Playtech software. Playtech vigorously monitors the casinos that use their software so that players never encounter bad experiences. You can trust Playtech to deliver the best games, mobile experience and reliability around. Playtech’s suite of slots continues to expand at a rapid pace – as many as 50 new titles are added to Playtech’s portfolio each year.

Iron Man 2 slot is our top pick - a robotic game of high tech spins played on a 5 reel, 25 payline screen (there is a 50 paylines version with 3000 coin jackpot too). The Iron Man 2 slot experience offers many stacked symbols, a free spins bonus round, and is linked to the Marvel Progressive Jackpot Network.

Quickspin Software

Quickspin is yet another gaming provider founded and run by Swedish management founders and management with an HQ in Stockholm, Sweden and registered office in Malta. QuickSpin have a portfolio of innovative and popular slots in spite of having only been in business since 2011. Quickspin are not only famous for hit video slot games, but also software platforms. The company was acquired by online gambling kingpins Playtech in 2016. The acquisition figure was not made public and QuickSpin have continued to operate as a largely autonomous company under the Playtech umbrella.

QuickSpin have a growing portfolio of slots available for mobile play as well as on desktop. As you might expect, they have incorporated the Scandinavian slot design into the games and there are many beautiful graphics and features in all their mobile games.

“Big Bad Wolf” and “Joker Strike” are two slots highly recommended. Get a sense of what Quickspin slots are all about now at leading mobile casinos. Quickspin have an aim of releasing 12 new slot games each year. How? They intend to have six slot prototypes on the go and 30 different concepts being worked on at all times. So keep your eyes peeled.

Thunderkick Software

Independent casino game supplier Thunderkick is relatively new to the party. Thunderkick software is known for innovative slot games with emphasis on design. Thunderkick mobile games are designed with clever functions.

An example of a top Thunderkick slot is “Birds on a wire” where instead of wheels spinning you get birds landing on a cable. Get the correct combination of birds and win big! Another example is “Fruit warp” where a bunch of fruits are thrown up and each time you get several of the same fruit you get new fruits and the chance to unlock a bonus game.

If you have not tested Thunderkick games on mobile we 100% recommend you take them for a spin.

PlaynGo Software

PlaynGo has been delivering quality games since 2005. Popular in Finland, PlaynGo has grown at a record pace with top mobile slots on offer on iPhone plus more. PlaynGo breathe quality over all their slot releases.

One popular PlaynGo slot is Reactoonz. Reactoonz is a fun alien filled parallel universe loaded with prizes. When playing Reactoonz animated aliens drop down from the heavens and land on 7x7 grid game. Reactoonz is a volatile slot, which means that you win less often, but when you do win you win big.

Elk Software

Elk is a Swedish game studio established in 2013. Based in Stockholm, Elk operates in a similar vein to NetEnt. They have always focused on quality over quantity, producing games of the highest quality by combining pioneering mathematics with mesmerising artwork. Elk supply their mobile-first slots to leading casino operators in the UK and worldwide.

A popular Elk game is “Bloopers” which launched in 2016. Bloopers is a classic ELK Studios slot with 5 reels and 243 ways to win. Take a trip down the red carpet with this Hollywood-inspired game with free spins Bonus feature. Watch out for Bloopers as they give you expanding wilds, falling symbols, free spins, symbol shuffles, random wilds and more!

Yggdrasil Software

Yggdrasil is an iGaming software company based in sunny Malta. Yggdrasil is known as an innovative slot provider, picking up numerous online casino awards industry since launching in 2013. Once part of a public-listed company Cherry AB, Yggdrasil is now flying solo again. Yggdrasil Founder and CEO Fredrik Elmqvist, ex NetEnt CEO, has a passion for quality slots and it shows when you unleash Yggdrasil software on mobile. Yggdrasil mobile slot games are fast and ooze class.

One popular Yggdrasil slot is “Easter Island” which is a progressive video slot with 5 reels and up to 113 pay-lines. Between 27 and 103 paylines to be exact. Easter Island is tropical overload, playable on all devices from 10p to £200 a spin. You will be transported to a pacific paradise. Sticky wilds expand the whole reel. A true belter of a slot.

Microgaming Software

No casino software provider list would be complete without Microgaming. Microgaming is a giant games manufacturer operating since 1994, making Microgaming is one of the oldest suppliers of online casino software. Over the years, Microgaming have pushed the boundaries creating waves of different slots loved by UK casino players.

Microgaming’s award winning style leans towards traditional British slots with 2D style and fast gameplay. Microgaming is perhaps most famous for big name slots and have released the Terminator 2 slot and the Game of Thrones slot to name a few. If you like movie themed slots, Microgaming is definitely a supplier for you!


Of course, there are other companies that we can add to this list. For example, No Limit City and Relax Gaming also performed well in 2020. Both No Limit City and Relax Gaming are new slot makers with massive potential doing hands-on work with some of the most successful gambling operators.

However, we think that the companies we listed above have the edge due to volume of slots released combined with advanced game features. If you are going to exploring mobile casino slots software, choose one of these providers!