Monster Casino Sister Sites: Best Alternatives & Offers (2026)
List of Monster Casino Sister Sites & Alternatives
Find and compare all of the best Monster Casino sister sites below, as well as the welcome offers of each. A couple of the ProgressPlay sister sites have been included (see the 'betting' tab), but we have also added some good alternatives to try out.
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New customers only. Deposit and wager a minimum of £25 on Big Bass Splash 1000 on registration day receive 100 Free Spins on Big Bass Splash 1000. Free Spins will be credited by midday the following day and expire after 7 days. 10x wagering requirement on Pragmatic Play slots before withdrawal. Full T&Cs apply. -
18+ New customers only. Wager £20 or more on Midnite Casino within 14 days of sign-up. Get 150 Free Spins to use on selected games, valued at 10p and valid for 7 days. T&Cs apply. BeGambleAware.org -
New UK customers only, 18+. 100% bonus on your first deposit up to £50. First deposit must be a minimum of £10; any amount deposited over £50 will not qualify for the bonus. Bonus wagering requirement is 10x the value of your first deposit and must be completed within 60 days of activation via the “My Bonuses” section of your account. The bonus is released in 10% increments to your Main Account balance. Full T&Cs apply. -
New customers: Deposit £10+ and wager 1x on casino games (wagering contributions vary) within 7 days from registration. Get 200 Free Spins on Big Bass Splash (worth 10p each), valid 3 days, no wagering on winnings. Opt-in required. 18+. T&Cs apply. -
LeoVegas Alternative50 Free Spins on Big Bass Splash When You Play £10 or More!Claim OfferSee MoreNew cust only. Opt in, deposit £10+ within 7 days of registering & wager 1x on eligible casino games within 7 days to get 50 Wager-Free Free Spins on Big Bass Splash. 3 day expiry. Wagering contributions vary. T&Cs & exclusions apply. 18+ GambleAware.org. -
All British Casino Alternative100 Free Spins on Le Bandit + 10% Cashback AlwaysClaim OfferSee MoreNew players only. Deposit & wager at least £10 to get free spins. Free Spins winnings are cash. No max cash out. Eligibility is restricted for suspected abuse. Skrill deposits excluded. Free Spins value £0.10 per spin. Free Spins expire in 48 hours. Full T&C's apply. GambleAware.org.
- 18+ Offer available to new customers only who sign up with Promo Code BET40GET20. Place a bet of £40 (or more) at EVS (2.0) or greater and Get 2 x £10 Free Bets. 1 x £10 Free Bet paid automatically & following £10 Free Bet after 24hrs. Min Free Bet odds 4/1 (5.0). Free Bets expire after 24hrs. Full T&Cs apply.
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New Players Only. Minimum stake £30, minimum odds 1.5, stake not returned. 1X wagering the winnings from the free bet. Wagering occurs from real balance first. Wagering requirement is calculated on bonus bets only, wagering starts from real funds. Free bet is valid for 7 Days from issue. Max conversion: £200. Limited to 1 sport & 5 casino brand/s within the network. Withdrawal requests void all active/pending bonuses. Full Terms Apply -
New Players Only. Offer Is Valid 00:00 CET 01/01/2026 until 23:59 CET 31/12/2026. Min £10 qualifying bets, stake not returned. Free bet is a one-time stake of £40, minimum odds 1.5, stake not returned. 1X wager the winnings. Wager from real balance first. Wager calculated on bonus bets only. Max conversion: £100. Free bets and Bonuses are valid for 7 days. Withdrawal requests void all active/pending bonuses. Excluded Skrill and Neteller deposits. Full Terms apply. -
18+. If your first bet is a Treble or Up on Any Sport (minimum 3 selections, odds evens) AK Bets will boost the profit gained on that initial bet by 25% in the form of a Free Bet up to a value of £/€100. Applies to new customers who sign up with the promo code AKACCA100. 7-day expiry on free bet. - 18+ New customers only. Place a £10 sportsbook bet at minimum odds 1/1 (2.0), within 14 days of sign-up and get £30 in Free Bets, valid for 7 days on selected bets and games only. T&Cs apply. BeGambleAware.org
- New customers: Deposit £10+ and place a sports bet within 7 days from registration. Get 4 x £10 Free Bets - 2 x Football Accas (4+) & 2 x Sports Multiples (2+), valid 7 days. Min odds apply. Excludes virtual sports, esports and non-UK/IE horse racing. Opt-in required. 18+. T&Cs apply.
- Football Free Bet Builder. Bet Valid on: Any Premier League game. Valid from 17:00 on 26/08/26 to 16:30 on 30/08/26. Pre-match only. Minimum 4 legs. Bet restrictions and T&Cs apply.
- New customers: Deposit £10+ within 7 days and place a sports bet. Get 3 x £10 Free Bets on Bet Builders. Valid 7 days. Min odds apply. Excludes virtual sports, esports and horse racing. 18+. T&Cs apply. GambleAware.org.
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Cashback is cash with no restrictions. Cashback applies to deposits where no bonus is included. T&C's apply. -
18+ New Customers Only. Bet £20 and get £20 in free bets. Register an account using the promo code “BL20” during registration and place a £20 qualifying bet at min odds of evens (2.0). Your free bet will be credited within 24 hours after your qualifying bet has settled. Free bets are non-withdrawable and expire after 30 days. Max offer one per customer. Qualifying bets cannot be placed on a price boost. Full T&Cs apply.
Who Owns Monster Casino?
Monster Casino has not been on the market for that long, hitting the ground running in 2017, and the site has become relatively popular since. It is owned as well as operated by ProgressPlay Limited, which is a well-known operator on the UK scene. Licensed and regulated by the UKGC under account number 39335, the company has 194 domains to its name.
Granted that a hefty portion of these are 'inactive', there are several active ones and many white-label arrangements as well. ProgressPlay is notorious for the latter, launching its services on various domains to attract new customers all of the time. A core focus has never been its thing, but at least this means Monster Casino has many sister sites.
Unfortunately, as we will take a look at next, most ProgressPlay brands are of very low quality and we would thus like to highlight some alternative brands instead. But first, using Monster Casino as the example, how come ProgressPlay is nowhere near the best betting sites in the UK?
My Thoughts on Monster Casino
I have never been a fan of the ProgressPlay brands, let's just get that out there. The sites tend to be rather slow, the design is incredibly outdated compared to other betting sites, and sites seem to shut down left right and centre. This is not something I'm looking for in a betting site, with the exception of doing a welcome bonus hunt.
For longevity, though, there are so many other good brands that also offer promotions for existing customers, not just half-decent welcome offers. Don't get me wrong, there is a reason why ProgressPlay has survived for quite some time now - seeing as the products are at least okay - but the best bookies have also made great strides forward in the same period.
Monster Casino Alternatives Reviewed
We listed some of the Monster Casino sister sites at the top of this page, so if you really want to join one, scroll up! Below, however, we will take a look at some good alternatives that we feel are much better to sign up for.
BetMGM
BetMGM has only been active in the UK since the summer of 2023, making it one of the new betting sites like many of the ProgressPlay brands, but the difference in class is evident compared to the latter. Indeed, the LeoVegas-powered site is now considered to be one of the best in the UK, which certainly cannot be said for any of the ProgressPlay sites.
Most customers have signed up because of very generous welcome offers, offering pure value to punters and casino players. Again, while some of the ProgressPlay brands have okay sign-up deals, you won't fall off your chair when receiving the bonus. On top of this, BetMGM also has very fast withdrawals.
Parimatch
Continuing on the white-label theme, Parimatch is another good alternative to Monster Casino as BV Gaming's products can be found on the site. In case you didn't know, that company has BetVictor as its flagship site and thus knows a thing or two about online gambling - which also shows on Parimatch.
We named the site the best for Aviator, having a dedicated offer for the Instant game, and the rest of the casino section is just as impressive. The sportsbook does not disappoint either, especially thanks to the convenient betting app, and this makes Parimatch a fantastic all-around bookmaker to join.
Virgin Bet
Virgin Bet is one of our favourite betting sites, using Kambi as the sportsbook provider, and we have actually been enjoying our time on the casino section as well. It's just a shame that there is no welcome offer for the casino, but aside from that we really don't have any complaints about the site.
The withdrawal times are incredibly fast, arriving after just a few minutes in our test, and the app is as strong as expected given the LiveScore ownership. There is some great stuff to be found in the promotions section as well, including the popular FIVES game which is free for users to play.
Isak is an experienced content writer with a background in sports journalism. Having focused mainly on football in the past, he certainly knows a thing or two about the betting industry and what makes a good bookie. At BettingLounge, he makes sure that the content is up-to-date and presented in the best way possible.