SisterSites Group
SisterSites Group operates Sister-Sites.co.uk, a London-based comparison and review platform indexing 2,000+ UK-licensed online casino sister sites across major operator groups. It earns affiliate commissions when users click through to register at listed gambling operators, serving primarily UK casino, bingo, and sports betting players.
- Company typePrivate
- Founded2018
- HeadquartersLondon, United Kingdom
- Headcount11–50
- GTM typeB2C
- OfferingDigital Commerce or Content
What SisterSites Group does
SisterSites Group is a London-headquartered private digital media company operating Sister-Sites.co.uk, a UK-focused comparison and review platform for online casino sister sites — gambling websites operated by the same parent company. Founded in 2018 and operating from Waterhouse Square in Holborn, the platform indexes over 2,000 sister sites across major UK-licensed operator groups including Broadway Gaming, LC International, Skill On Net, Gamesys, White Hat Gaming, Aspire Global, and Jumpman Gaming, providing users with UK Gambling Commission license verification, expert reviews, bonus information, and real player feedback. The company's technical stack is described as a standard web platform with a content management system for casino reviews and operator listings, with no disclosed mobile app, API, or proprietary AI capabilities; the sole product is the sister-sites.co.uk website.
The business model is affiliate-driven and freemium for end users. Visitors browse listings, read reviews, and click through to register at listed gambling operators; SisterSites Group earns commissions on the resulting player activity (CPA and/or revenue-share arrangements with operators). Its go-to-market is product-led growth combined with SEO-driven organic acquisition, supplemented by a Twitter/X presence (@uksistersites), a YouTube channel, and a weekly email newsletter distributing welcome bonuses and free spin offers. The platform primarily serves UK online casino and bingo players, with secondary traffic from Canada, New Zealand, Ireland, the Netherlands, and Sweden. No funding rounds, investors, acquisitions, leadership team, or revenue figures are publicly disclosed, and the company appears to operate as a bootstrapped, founder-led entity with 11–50 employees.
SisterSites Group firmographics
Firmographics- Name
- SisterSites Group
- Legal name
- Sister Sites Group
- Website
- https://sister-sites.co.uk
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- SisterSites Group operates Sister-Sites.co.uk, a London-based comparison and review platform indexing 2,000+ UK-licensed online casino sister sites across major operator groups. It earns affiliate commissions when users click through to register at listed gambling operators, serving primarily UK casino, bingo, and sports betting players.
- Ownership category
- akta.pro rank
SisterSites Group industry classification
Industry- Product category
- Online Gambling Affiliate & Comparison Platform
- akta.pro primary industry
- Casino/iCasino Affiliate & Review Sites (MPAEAMAB)
Keywords
Where SisterSites Group is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
SisterSites Group business model
Business model- GTM type
- B2C
- Offering type
- Digital Commerce or Content
- Cost components
- Personnel, Marketing or Sales, Technology or R&D, Operations
Revenue model
- Affiliate/Referral Commissions: The company earns affiliate commissions when users click through to register at listed casino sites. This is the primary revenue model for the comparison website.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Free access for all users |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
SisterSites Group product offering
Product offeringCore offering
SisterSites Group operates Sister-Sites.co.uk, a UK-focused comparison and review website that catalogs online casino sister sites (gambling websites operated by the same parent company). The platform provides expert reviews, player feedback, and bonus information for over 2,000 sister sites across multiple UK-licensed operators including Broadway Gaming, LC International, Skill On Net, Gamesys, Aspire Global, Jumpman Gaming, and White Hat Gaming.
Product overview
SisterSites Group operates Sister-Sites.co.uk, the UK's leading independent comparison website for online casino sister sites and related gambling brands. The platform provides expert reviews, real player feedback, and exclusive bonus information for casino sites, bingo sites, and sports betting sites operated by the same parent companies. The offering is a single unified review and listing platform that aggregates information on over 2,000 sister sites across multiple operators including Broadway Gaming, LC International, Skill On Net, Gamesys, Aspire Global, Jumpman Gaming, and White Hat Gaming. The platform's core function is helping players discover related gambling sites and understand their operators, licensing status, and trustworthiness.
Differentiator
Problem solved
Functional benefit
Products and services
- Sister-Sites.co.uk
Quantifiable outcome
- Reviewed nearly 1,500 online casinos, bingo sites, and online bookmakers
- +1 more outcomes
Companies that use SisterSites Group
Customer profileSegments3 records
Ideal customer profiles1 record
SisterSites Group technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
SisterSites Group partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Gambling CommissioncoreSisterSites Group operates under UK Gambling Commission oversight and promotes compliance with gambling regulations. The platform requires that operators listed hold valid UKGC licences where applicable and directs users to official regulatory resources.
Scale indicators3 records
Recent moves6 records
Expansion highlights4 records
SisterSites Group competitors and assessment
Company assessmentDirect peers
- Top10Casinos.com: Casino comparison/affiliate site producing ranked reviews and bonus listings. Direct overlap with SisterSites in target audience (UK and EU players), content format (top-10 reviews) and monetisation (affiliate CPA/revshare).
- WhichBingo: UK bingo review and affiliate site owned by Spotlight Sports Group. SisterSites already covers bingo sister sites, so WhichBingo is a directly overlapping competitor in the same vertical and affiliate model.
- AskGamblers: Global casino review and complaint-resolution site monetised via affiliate commissions. Comparable in that it aggregates player feedback alongside reviews — a feature SisterSites emphasises as a differentiator.
- BonusFinder: Online casino and sportsbook comparison/affiliate site operating in multiple regulated markets including the UK. Comparable product proposition (review listings, bonus-led conversion, affiliate revenue) to SisterSites.
- Bookies.com: UK-focused bookmaker and casino comparison site operating on affiliate commissions. Comparable in operator coverage (broad UK-licensed brands), audience (UK bettors) and revenue model.
- CasinoSites.org.uk: UK-focused online casino review and comparison site, monetised through affiliate commissions. Closely comparable to SisterSites in audience (UK players), model (affiliate/review) and content (operator reviews and bonuses).
Broad incumbents
- Gambling.com Group: Publicly listed (Nasdaq: GAMB) gambling performance marketing company operating a portfolio of affiliate sites across casino, sports and bingo in multiple jurisdictions. Comparable as a scaled incumbent in the same affiliate/review space, with much broader geographic reach.
- Better Collective: Listed (STO: BETCO) sports betting and iGaming affiliate group with a portfolio of regional review sites across Europe and the US. Comparable as an established affiliate roll-up that acquires niche sites like SisterSites to expand operator relationships.
- Catena Media: Listed gambling affiliate operator with sites spanning casino, sports and financial trading. Competes with SisterSites for operator affiliate budgets and SEO authority across regulated markets.
- Oddschecker: UK odds comparison and betting affiliate site with expansion into casino content. Overlaps with SisterSites on operator reviews and affiliate commissions, but anchored in sports betting rather than casino sister sites.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat3 records
Key risks6 records
Key highlights6 records
Customer concentration
SisterSites Group social profiles
Digital presenceSisterSites Group financial estimates
Financial estimateRevenue estimate
Valuation estimate
SisterSites Group leadership team
Management profileNumber of profiles
SisterSites Group funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
SisterSites Group M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about SisterSites Group
What does SisterSites Group do?
SisterSites Group operates Sister-Sites.co.uk, a UK-focused comparison and review website that catalogs online casino sister sites (gambling websites operated by the same parent company). The platform provides expert reviews, player feedback, and bonus information for over 2,000 sister sites across multiple UK-licensed operators including Broadway Gaming, LC International, Skill On Net, Gamesys, Aspire Global, Jumpman Gaming, and White Hat Gaming.
Is SisterSites Group a public or private company?
SisterSites Group is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was SisterSites Group founded?
SisterSites Group was founded in 2018. It employs 11 to 50 people.
Where is SisterSites Group based?
SisterSites Group is headquartered in London, United Kingdom, in the Europe region.
How does SisterSites Group make money?
One revenue line is on record: affiliate/Referral Commissions.
Who are SisterSites Group's main competitors?
Direct peers on record are Top10Casinos.com, WhichBingo, AskGamblers, BonusFinder, Bookies.com and CasinoSites.org.uk. Broad incumbents are Gambling.com Group, Better Collective, Catena Media and Oddschecker.
Does SisterSites Group have an API?
No public API is recorded for SisterSites Group.
What industry is SisterSites Group in?
SisterSites Group's product category is Online Gambling Affiliate & Comparison Platform. Its primary akta.pro industry code is MPAEAMAB, Casino/iCasino Affiliate & Review Sites.