Slot Boss sister sites square banner with Turquoise background and the text: No deposit bonus, 100% match-up, 400+ slot games and Eyecon progressives. the bottom left and right display the images of A roulette wheel and a slot machine. 18+ symbol on the top left corner and the BeGambleAware.org logo with Helpline: 0808 8020133 is displayed on the bottom center of the image.The Slot Boss sister sites have become the daddy of all slot sites in the UK. Players love the amazing choice of video slot and progressive Jackpot games available at the site.

But a free £10 no deposit bonus for newcomers coupled with ongoing promotions and superb customer service are some of the reasons why slot players look for sites similar to Slot Boss.

Regardless of your preferred choice of game (slots, roulette, poker or casino table games) many of you would like to join a new gaming site that offers a similar gaming experience.

That's why we've put together the full list of Slot Boss sister sites for you to enjoy. Read on for the full details…

The following are the main features that Slot Boss, its partner sites and similar casinos offer to players:

Slot Boss Sister Sites 2020

The list of Slot Boss sister sites include 21 casino, Castle Jackpot, Pink Casino, UK Casino, MCasino and Leo Vegas.

Due to an increasing number of players' complaints, we're not in the position to recommend that you play at any of the true Slot Boss sister sites. But we've have a list of alternative casinos with free no deposit bonus offers, huge collection of slot games and jackpots for you to enjoy:

Rank
Sister Sites
Bonus
Rating
Visit

21 Casino – 121% bonus Slot Boss sister sites.

If you’re fishing for freebies and lots of fun online video slot games, 21 casino is another casino site similar to Slot Boss which also offers all newcomers a 121% deposit bonus up to £300 . Much like any of the Slot Boss partner sites, there’s a wagering requirement of 35x your bonus amount to deter bonus hunters from trying to make a quick pound without actually meaning to play at the site for real.

If you do want to play for real money prizes then there’s an unusual 121% free welcome bonus that can give you up to £300 extra to spend on the games. Slot games are powered by a mind-blowing number of brands such as NetEnt, Elk Studio, WMS, Thunderkick, Scientific Games and many more. You should know that many of the best slots are also available in a progressive Jackpot version if you fancy your chances of winning a crazy cash prize.

The mix of slots software at 21 Casino is not unique but it's one that players love. If you'd like to discover more casinos with similar features that offer a fun and secure gaming experience, have a look at the list of Pots of Luck sister sites with similar software, bonuses and games.

Castle Jackpot – A site similar to Slot Boss with £10 free no deposit.

Castle Jackpot sister sites square banner with Mustard background and the text: No deposit bonuses, 80+ jackpot games, no wagering offers and daily and mega jackpots. the bottom left and right display the images of A NetEnt slot machine and a slot machine icon. 18+ symbol on the top left corner and the BeGambleAware.org logo with Helpline: 0808 8020133 is displayed on the bottom center of the image.Another one of my favourite Slot Boss casino sister sites is Castle Jackpot. It’s a cool online casino that welcomes players with a generous £10 free no deposit bonus to spend playing online slots.

Apart from the no deposit bonus there’s also a £25 free welcome bonus that it’s credited after you make your first deposit.

And just like you’d expect from any of the Slot Boss partner sites, there’s a wagering requirement of 99x your bonus amount with a maximum winning limited of £50 cash.

It’s truly not a bad deal if you fancy an offer that gives you a real taste of the action without forking out a pound of your own money.

If you're looking for more free no deposit bonuses and huge collection of online slots, we recommend that you visit our Castle Jackpot sister sites review.

Pink Casino – A Slot Boss sister site for female players.

Pink Casino Sister Sites bannerOur fifth option of the best sister sites to Slot Boss is Pink Casino. This gaming site has clearly been designed with the female and savvy player in mind. All new registrations to the site are eligible for a free £10 no deposit slots bonus for newcomers.

As it is the case with any other site similar to Slot Boss casino, the freebie does not come without some restrictions. Expect to meet a wagering requirement of £990 before even dreaming about requesting a withdrawal.

There’s a huge choice of online slots, progressive Jackpots, casino and bingo games on offer. Powered by the best software in the industry, here you can play games like Starburst, the whole Rainbow Riches slots saga, Lucky Lady’s Charm slot, Golden Goddess slot, Action Bank, Cleopatra, Reel King slots game, Kitty Glitter, Fluffy Favourites Jackpot, the full Monopoly slots saga including Monopoly Big Event and Bring the House Down slots.

Still not satisfied? Find more similar casinos with a free bonus in our Pink Casino Sister Sites – Find the best slots at the top similar casino sites.

UK Casino – A sister site to win up to £50 no deposit bonus.

And our last choice for players looking for sites like Slot Boss is UK Casino. At this popular gaming site players are welcomed with a free £10 no deposit slots bonus that can be spent on slots, table games, and live casino games.

As it happens with other Slot Boss sister sites, there's a limit as to how much you can win using the free bonus. In this case, players can withdrawal up to £50 in cash after meeting the wagering requirement while staking a maximum amount of £5 per spin.

One reason for listing UK Casino as the last recommended option is that they have made it clear in their T&C’s that they are “not obligated” to discuss player complaints.

MCasino – A sister site of Slot Boss with a 10x booster bonus.

Players looking for a unique free no deposit bonus offer should visit MCasino. This online casino is different from other Slot Boss sister sites in that new players can get a £1 free no deposit bonus after registration. Getting just £1 free bonus seems cheap, doesn’t it? What’s different about this bonus is that it comes with a 10x win boost.

This means that any winning combination you get from this £1 bonus will be multiplied by 10, thus giving you a chance to win a much higher prize and best of all, tied to a wagering requirement of 99 x £1 instead of x £10 as it’s the case with the rest of the sister sites of Slot Boss. Game-wise you won’t miss anything. Slots here are powered by IGT, Evolution Gaming, Barcrest, Microgaming, NetEnt and even Novomatic. Create a new player account and get your £1 free with 10x booster bonus.

Leo Vegas – The most popular of all Slot Boss sister sites.

Leo Vegas Sister Sites bannerLeo Vegas casino is the most popular Slot Boss partner site offering one of the best gaming experiences online. Incidentally, Leo Vegas was the first 100% mobile-friendly online site to offer a mix of the best slot software under the same roof. IGT, Microgaming jackpot games, WMS and Barcrest slots are all found here.

It’s also one of the most generous Slot Boss sister sites featuring a whopping £700 free bonus welcome package.

Not to get confused, this bonus package gives you 100% free bonus up to £50 on your first deposit; but more bonuses follow once you’ve become a registered player at the site. If you like playing slots at Slot Boss, you will love Leo Vegas. Sign up today.

If you like Leo Vegas, you should have a look at our LeoVegas Sister Sites – Up to £250 free bonus at similar sites.


FAQ

Who owns Slot Boss?

Slot Boss is owned and operated by LeoVegas Gaming plc.

Is Slot Boss casino safe?

Slot Boss is licensed and regulated by the UK Gambling Commission with licence reference number 1012453.

What is the best Slot Boss sister site?

Leo Vegas is by far the best of all Slot Boss sister sites. It offers the largest choice of games, free no deposit= bonus and it was one of the first 100% mobile ready casinos.

Can I deposit with Paypal?

Yes, you can make deposits and withdrawals at Slot Boss using your PayPal account.

Will I receive free spins at Slot Boss?

Yes. As a new player, you will receive a £10 free no deposit bonus when you sign up. There's a 99x wagering requirement and you must Opt-In to receive it. But keep in mind the complaints that surround this offer.

What is the min deposit amount?

The minimum deposit you can make at Slot Boss is £10.

What are the sister sites of Slot Boss?

The sister sites of Slot Boss include: 21 casino, Bet UK, Bingo Stars, Castle Jackpot, Crown Bingo, Legs 11, MCasino, Pink Casino, Slot Boss, Slot Mob, Slotto, UK Casino and Leo Vegas.