About Us

Independent research. Transparent methodology. No shortcuts.

Who we are

SisterIndex is an independent editorial team that traces casino operator networks across the United Kingdom. We exist because players deserve to know who actually runs their casino before they deposit a single pound.

Most casino review sites list bonuses and move on. We go further. Every guide we publish is built on verified licensing data, corporate filings, and operator disclosures pulled directly from the UK Gambling Commission public register. When we say two casinos are sister sites, we can show you exactly why.

We are not a casino. We do not hold customer funds, process bets, or operate any gambling platform. SisterIndex is a research and information site built to make complicated brand relationships easier to read.

Think of the site as a map rather than a megaphone. A casino logo is the starting point. The useful questions come next: who operates the brand, which other websites are connected, what may be shared, what remains separate, and which account or payment details deserve a closer look?

How we research casino sister sites

Every sister site guide follows the same editorial process, regardless of the size of the brand or the complexity of its operator network.

We begin with the UK Gambling Commission public register, cross-referencing licence numbers, registered company names, and named directors. We then trace corporate ownership through Companies House filings to identify parent companies, subsidiaries, and shared infrastructure. Where licensing data alone does not tell the full story, we examine platform providers, payment processors, and software fingerprints to verify operator connections.

Once a guide is drafted, it passes through a factual review stage where every claim is checked against public records. We update published guides when operators change hands, merge brands, or lose their licence. Each guide displays a last reviewed date so you always know how current the information is.

Our methodology is not perfect - operator networks change frequently, and offshore structures can be opaque. When we cannot verify a connection, we say so. We would rather publish an incomplete guide than an inaccurate one.

Readers can explore the same starting points through the Gambling Commission public register and the official Companies House search. The purpose of SisterIndex is to organise the relationship in plain English and connect it to the practical questions a reader is likely to ask next.

Who SisterIndex is for

Editorial illustration for Who SisterIndex is for

SisterIndex is written for adults who want more context than a casino name and a promotional headline. Some readers arrive because they recognise a brand and want to find its related websites. Others are trying to understand an account message, compare payment routes, or work out why two casino websites feel familiar.

The site is especially useful when you want to:

  • find casino sister sites connected to a brand you already know;
  • separate a direct sister site from a wider group brand or independent alternative;
  • understand the difference between a public casino brand and the company operating it;
  • compare deposits and withdrawals as two separate parts of the cashier journey;
  • read account, verification, support, and offer questions in a more organised order;
  • move from a broad UK casino search to one specific, useful answer.

Readers who are ready to compare named destinations can browse all 12 featured casino websites on the homepage. The cards include Zizobet, Wildies, Cosmobet, Win Place, SlotRoyals, WinBeast, Velobet, ShelbyWin, Smash Casino, Odin Fortune, Gambiva and LegionBet, with their saved descriptions and named Visit routes.

What you can read on SisterIndex

Brand-led research Casino sister-sites directory Browse named brands, operator networks and standalone answers. Practical questions UK casino guides Explore payments, withdrawals, accounts, offers and verification. Deeper explanations SisterIndex blog Understand brands, operators and the decisions behind a comparison.

Casino sister-site pages

These pages begin with a named casino and answer the relationship question directly. A good network page should make it easy to see whether there are direct sister sites, wider group connections, or independent alternatives. Start with examples such as 888 Casino sister sites, Betfair sister sites, or bet365 sister sites.

Sister-site and operator guides

Guides focus on the company relationship rather than repeating a generic casino list. The sister-site verification checklist explains how to investigate a connection step by step, while the operator-network directory groups connected brand pages under their wider company context.

Operator and account explainers

The blog handles questions that sit between several pages. Read the difference between a casino brand and operator, explore accounts across casino sister sites, or see why sister-site research matters before comparing individual brands.

Our editorial principles

Casino-network content becomes noisy very quickly, so we use a few simple principles to keep each page readable and useful:

  • Answer first: readers should not need to cross a wall of introductions before learning whether a network exists.
  • Label the relationship: direct sister sites, wider group brands and independent alternatives should not be mixed together.
  • Keep the brand page central: one primary page should remain the strongest destination for each named sister-site search.
  • Link by the next question: an internal link should lead naturally to accounts, deposits, withdrawals, offers, or operator research.
  • Preserve uncertainty: when a relationship is unclear, the page should explain what is missing instead of forcing a confident label.
  • Write for scanning and reading: short answers, bullets and comparison paths help first; fuller explanations support readers who want detail.
  • Keep pages distinct: the homepage introduces the topic, the directory supports browsing, brand pages answer named searches, and guides handle practical questions.

How to read one of our network pages

  1. Read the short answer. Is the casino part of a clear network, a limited group, or a standalone search?
  2. Check the relationship label. Do not treat every alternative as a sister site.
  3. Scan the comparison. Look for the differences that matter to you rather than choosing by logo alone.
  4. Follow one practical guide. Move to accounts, payments, withdrawals, or offer wording when that is the next real question.
  5. Return to the exact website. The casino's current pages describe what is available to that account today.

That sequence keeps the research playful but useful: map the family, label the cousins, and then check whether you actually want to visit the reunion.

What SisterIndex does not do

Editorial illustration for What SisterIndex does not do

SisterIndex cannot operate a casino account, approve a withdrawal, change a payment status, unlock a login, or decide a complaint. We can help readers understand the research route and the questions to ask, but account-specific action belongs with the operator and the support or complaints process shown on its website.

We also do not assume that a shared parent company makes every website identical. Related brands can still present different games, navigation, promotions, cashier options, support journeys, and account wording. The network is context—not a shortcut around reading the exact page.

Our editorial team

Lynsey Thompson

Editor-in-Chief

Lynsey is an iGaming specialist with over a decade of experience in the casino and sports betting industry. She holds a postgraduate diploma in journalism and previously worked in marketing, PR and events management for UK sports and media companies. She writes about casino brands, parent companies and operator networks and oversees SisterIndex editorial output.

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Andrew McCulloch

Compliance Reviewer

Andrew contributes compliance-focused editorial review for SisterIndex, with attention to responsible gambling language, operator transparency, ownership claims and the relationships connecting casino brands.

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Jonathan Ridehalgh

Senior Casino Analyst

Jonathan has spent over four years as Head of Casino SEO at a UK digital gaming company, with previous roles at multiple iGaming affiliates. He brings deep technical knowledge of how casino operators structure their platforms, manage slot portfolios and position their brands. At SisterIndex, he leads our sister site research methodology and operator network analysis.

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Kaiden Laverty

Content Editor

Kaiden is a freelance casino and iGaming writer with ten years of experience in digital marketing, content strategy and SEO. He has written for multiple casino sites and sports betting brands across the UK market. At SisterIndex, he manages editorial quality, fact-checking workflows and publication scheduling across our guides, blog and sister site listings.

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Questions about SisterIndex

What is SisterIndex?

SisterIndex is a UK-focused information site that maps casino brands to operator networks and connects those relationships to practical account, payment, withdrawal and comparison guides.

What is a casino sister site?

A casino sister site is a related brand connected through an operator, licence holder, ownership structure, account network or another clearly described business relationship. Similar design alone is not enough.

Does the same operator mean every casino is identical?

No. A company connection can provide useful context, but each brand may still have different games, navigation, payments, promotions, support routes and account wording.

Where should I start if I know the casino name?

Start with the casino sister-sites directory and open the named brand page. Use supporting guides only when the next question becomes clear.

Where should I start with an operator question?

Use the casino operator-network directory for company hubs and the sister-site verification guide for a relationship check.

Are the casino cards automatic recommendations?

No. The cards are comparison and navigation entries. Readers should open the website, read its current terms, check the cashier and decide whether the experience suits them.

Can casino sister-site relationships change?

Yes. Brands and operator structures can move, which is why readers should compare the page with the current company and account wording shown on the exact casino website.

Can SisterIndex access my casino account?

No. SisterIndex cannot view accounts, payments, documents or withdrawals. Contact the casino using the support route displayed on its website for account-specific help.

Can SisterIndex resolve a casino complaint?

No. We can explain general research routes, but complaints must follow the operator's published process and any next step described in that process.

How can I suggest a correction or missing network?

Send the page URL, the specific wording or missing brand, and the source page that supports the request through our contact form.

Get in touch

Have a correction, a question about a listing, or a media enquiry? We take accuracy seriously and welcome feedback from readers, operators, and regulators.

Contact us →

Continue through the SisterIndex research map

Move from the UK casino sister-sites directory to the casino operator-network index, then use the sister-site verification checklist or connected-account guide when the question becomes more specific.

For external source context, search the Gambling Commission public register and compare company names through Companies House records.

Gambling responsibly

All casinos listed on SisterIndex are presented for informational purposes. If you choose to gamble, do so responsibly. If gambling is affecting your life, please contact:

18+ only. Please gamble responsibly.