What is Online Casino Software?

“Casino software” describes the various platforms and technologies on which online casino games are played. This can include:

  • How the games look and feel
  • The technology hosting the games (cloud-based, downloaded software, mobile app)
  • Game fairness, RTP and payouts
  • Stylistic elements (bonuses, graphic, gameplay)
  • Types of games (slots, table games, live dealer games etc)

A single online casino can incorporate software from dozens of different game developers, leading to a multitude of gaming experiences within a single platform. For example, Microgaming and NetEnt are both famous and successful game developers—but the playing experience is vastly different for each.

Online casino software is arguably the most crucial differentiator between top-class and bottom-rung casinos.

The Best UK Casinos Not On Gamstop


475% Welcome Bonus up to €3,000

mystake casino review

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MyStake Casino is one of the most engaging, high-quality and moreish non-GamStop casinos we’ve reviewed this year. Every important box is ticked with authority, creating an online gaming experience like no other in 2022!


100% up to €500

PlayHub is one of the fastest-growing adult online casinos. Its sexy dealers are in a class of their own, while the overall infrastructure—from games, to filtering options and bonuses—are also outstanding.


222% Welcome Bonus up to £1000

Casper spins casino logo

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The tiny 1x wagering requirements are the biggest attraction to players at Casper Spins Casino. The games collection is also thorough and high-quality, fulfilling the two essential needs of most players. The rest of the casino—security, banking, support, etc—was either par for the course or better.

Black label casino

900% up to €2,700

Welcome to one of the hottest new online casinos not on GamStop. Launched in 2020, this young casino is blowing away the more established competition—their bonuses are bigger, the games are slicker, and the whole platform runs like a Ferrari!

Triumph Casino

375% up to €3,000

Although considered one of the less flashy non-Gamstop casinos, Triumph Casino is an incredibly trusted name in the industry due to its speedy payouts and catch-free promotions. The site features slots, table games, live casino and virtual sports, but the area that Triumph Casino really comes into its own is in the packed calendar of tournaments and lotteries that feature every single month.

Captain Marlin Casino

475% up to €3,000

Don’t be fooled by its goofy-looking mascot; Captain Marlin Casino is the real deal. This fun, community-focused non-Gamstop casino offers plenty of excitement to players in the form of “battle” tournaments – where the top-ranked players all win cash prizes – while daily “prize box” lotteries can give away everything from gadgets to bonuses. How many will you be able to reel in?


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A sharp, enjoyable new casino with impressive games and even more impressive bonuses!

Fortune Clock Casino

225% up to €3,000

Undoubtedly one of the best-established and most-trusted operators among all UK-friendly non-Gamstop casinos, it’s easy to see why Fortune Clock is a hugely popular choice among players. With the site offering daily gifts that can be used across a wide range of slots and live casino games, Fortune Clock goes all out to reward loyal players and offers a generous bonus to get you started.

UK Software Casinos Without GamStop

When looking for new online casinos not on GamStop, it’s paramount that they have high-quality casino software—if not, players will be unable to enjoy their favourite games.

Since every developer builds their games in a unique way, there are therefore consistent and notable differences between developers. So, let’s take a look at some of the best game providers at non-GamStop online casinos.



One of the oldest casino game providers in the world, Microgaming casino sites are highly coveted by players. Microgaming is known for producing games which are exceptionally volatile and highly-paying. Its progressive jackpot game Mega Moolah is the highest-paying online casino game in history, unleashing a jackpot of over €19 million in 2021.

However, Microgaming casino sites don’t stock games by other providers. Players may also have to download desktop software or mobile apps to play Microgaming games, but thankfully most Microgaming casino sites now support in-browser play.

The only downside is that Microgaming casino games are usually quite basic in terms of visuals, interactiveness and bonus rounds.


NetEnt games are probably the most popular in the industry. Famous for blockbuster graphics, NetEnt slots are often closer to video games than classic slots. NetEnt online casinos allow rapid in-browser play on any device. Even better, most of their games can be played for free in demo mode—something that other casinos not on GamStop might not offer.

While best-known for slots, NetEnt casino games also include progressive jackpots, RNG table games and an incredibly immersive live dealer suite. The Swedish giant’s games are innovative, beautiful and, we’re happy to report, regularly available at non-GamStop casinos!


While they sometimes fly under the radar, Novomatic slots are some of the biggest in the entire industry! For example, Book of Ra is played at most of the world’s online casinos, reeling in thousands of players every single day. The game loads quickly and offers a max return of 5,000x stake and has a 30% hit frequency.

Other slots at Novomatic online casinos are Sizzling Hot Deluxe, Dolphin’s Pearl, and Lucky Lady’s Charm. While none of these slots offer Pixar-level graphics or storylines, they provide something even more valuable: big wins. You’ll find Novomatic slots at most casinos not on GamStop.


Real Time Gaming

Real Time Gaming was founded in 1998 in Atlanta, and has become one of the biggest American online gaming brands—despite moving its operations to Costa Rica. RTG online casinos are best known for their fun array of online slots. Games like Cleopatra’s Gold, Casino War, Aztec Millions and Mayan Queen may not have the same brilliance as NetEnt slots, but they pay generously and attract millions of players around the world.

Most games are available for instant play, though some RTG casinos still use downloadable desktop software.



Betsoft casinos are a perennial hit among online casino players, yet despite that popularity, the developer only has about 200 games to its name—Microgaming released half that number in 2021 alone!

You’ll recognise Betsoft online casino games by their old-fashioned graphics and animations. Unlike some modern providers, Betsoft doesn’t try to be innovative—it just produces solid, enjoyable games for its loyal player base. Check out “The Slotfather” series or Greedy Goblins to see Betsoft’s best work!

Evolution Gaming

Evolution Gaming

Evolution Gaming casinos have been the runaway kings of live dealer games for over a decade. There is no one in the industry that can match the diversity of games (blackjack, roulette, baccarat, sic bo, poker variations, bingo, and much more) or the quality of execution.

Evolution Gaming online casino software is incredibly polished. It’s easy to navigate and the design is perfectly modern. Most importantly, the company employs over 3,000 professional dealers—by far the most charming, experienced and entertaining in the business. Players can even enjoy 15+ languages at more than 700 tables worldwide.

All games available in-browser for instant play.

Rival Gaming

Rival Gaming

Founded in 2005, Rival Gaming now boasts over 250 games that can be played on any device. Their famous i-Slots are available in many Rival Gaming casinos—these trademarked games feature an interactive storyline that sets them apart from regular slots.

Rival Gaming online casinos find a nice balance between building sufficiently complex and attractive games, without over-engineering and overwhelming players.

Pragmatic Play

Pragmatic Play

Pragmatic Play is one of the more adventurous online casino game providers. Their goal is not simply to create fun games—it’s to dazzle and delight players with groundbreaking graphics, innovative game modes and high-volatility payouts.

While Pragmatic Play casinos are best-known for Wolf Gold and the John Hunter video slots, a small number also supply RNG and live dealer table games! You can tell a true Pragmatic Play casino by the inclusion of live Bonanza Candyland—the live dealer adaptation of their iconic video slot!



While they sometimes fly under the radar, Thunderkick online casinos punch far above their weight. An independent Swedish game developer with bold ideas, Thunderkick has risen to prominence thanks to its superbly entertaining games, built on its absurdly high-quality casino software.

The casino is well-known for creating games that are fair, with generous and extremely consistent payouts—something that veteran online casino players do not take for granted. The developer’s Beat the Beast series is particularly popular, with nearly a dozen variations.

Casinos Not Blocked by GamStop Software

If you’re new to the world of non-GamStop online casinos, we’ve got great news: there are dozens to choose from! These are all safe, high-quality online casinos which are not blocked by GamStop software. We have reviewed all the best, brightest and newest casinos and you can find our favourites right here:

Games not on GamStop

You might be worrying that some of your favourite games will be prohibited by GamStop—we’re happy to report that this is very unlikely!

The game providers we’ve described above are only some of the many, many developers whose games are available on non-GamStop casinos. And while it’s true that, for example, a NetEnt online casino might not stock all NetEnt games, there are no specific games which are restricted by GamStop.


The software at today’s non-GamStop casinos is every bit as polished and high-quality as anywhere else. From Microgaming casino sites to those hosting 30 or 40+ game developers, we are enjoying a golden era in online gaming.

It used to be that every casino required downloadable software that was clunky, slow, and prone to disconnection. Now we have non-GamStop casinos with thousands of world-class games, hosted on slick and high-performance platforms that are accessible on any device, on any operating system.

We are entering a real golden age of online casino gaming!