The world’s most-visited online gambling domains tell a story most industry reports miss

The global online gambling market is projected to exceed $100bn in revenue during 2026, driven by regulatory expansion across Latin America, Africa and parts of Asia, and sustained mobile adoption in mature European markets. But behind the headline figures, the competitive landscape is defined by a relatively small group of operators that command enormous traffic volumes and, in many cases, operate across dozens of jurisdictions simultaneously.

This report identifies and profiles the 17 most-visited online casino and betting domains in the world, drawing on traffic data from Semrush, SimilarWeb and Ahrefs. It covers operator financials where public data is available, traces the licensing framework that shaped the industry’s structure, and examines where the revenue actually sits.

A Brief History of Online Casino

The online casino industry traces its origins to the mid-1990s. Antigua and Barbuda passed the Free Trade and Processing Act in 1994, creating the first regulatory framework that allowed companies to apply for licences to offer gambling services over the internet. That same year, Isle of Man-based software company Microgaming developed what is widely considered the first fully functional online casino software. Its first casino, The Gaming Club, began taking real-money wagers shortly after, initially serving players in South Africa under the domain casino.co.za.

In 1996, CryptoLogic launched InterCasino with 18 games and, critically, integrated online payment processing. InterCasino is often credited as the first online casino to offer a complete digital experience, from registration through to withdrawal. The Kahnawake Gaming Commission in Quebec also began issuing licences that year, and by the end of 1996, roughly 15 gambling websites were operating globally.

Growth was rapid. By 1997, more than 200 online casinos and sportsbooks were live, and annual industry revenue had crossed $1bn.

The industry adapted by shifting its centre of gravity to Europe and emerging markets. Mobile technology, live dealer games (pioneered by Playtech in 2003 and later dominated by Evolution), and the proliferation of regulated markets have since pushed the sector to its current scale. Europe’s gross gambling revenue alone reached €123.4bn in 2024, with online channels taking an increasing share year on year.

How the Licensing Framework Evolved

The structure of today’s online gambling market was shaped by two licensing jurisdictions more than any others: Curacao and Malta.

Curacao began issuing gambling licences in 1996, making it one of the earliest jurisdictions to regulate online gaming. Under its original framework, four master licence holders (Antillephone, Curacao E-Gaming, Gaming Curacao and Curacao Interactive Licensing) could issue sub-licences to operators, creating a system that was fast, affordable and covered all gambling verticals under a single permit. At its peak, more than 1,200 operators held Curacao sub-licences, and the jurisdiction became the default starting point for new entrants targeting global markets.

Malta established the Malta Gaming Authority (MGA) in 2001, becoming one of the first EU member states to offer dedicated online gambling legislation. The MGA licence carried greater regulatory weight than Curacao, requiring stricter AML and KYC compliance, player protection measures, and regular audits. As an EU jurisdiction, Malta-licensed operators gained access to European markets without needing separate country-level approvals in most cases, a significant commercial advantage.

For much of the 2000s and early 2010s, many operators held both licences simultaneously. They would run a single website or shared-wallet platform where some games were supplied under an MGA licence and others under a Curacao sub-licence. This allowed operators to offer a broader game portfolio by mixing EU-licensed and offshore-licensed content on the same domain.

That practice ended on 4 June 2018, when the MGA issued a formal notice prohibiting shared wallet setups between MGA-licensed gaming services and games supplied under non-EU/EEA licences. The notice specified that operators had until 31 December 2018 to dismantle any arrangements where Curacao-licensed, Costa Rica-licensed or Kahnawake-licensed games appeared alongside MGA-licensed content on the same website or linked domains. From 1 January 2019, the rule was enforced as a regulatory priority.

In parallel, individual countries began building their own regulatory frameworks. The UK Gambling Commission (UKGC), established under the Gambling Act 2005, set the template for strict national licensing. Spain launched its online gambling regime through the DGOJ in 2012. Italy overhauled its licensing system in 2024, issuing 52 new online permits under a refreshed framework. Germany introduced its Interstate Treaty on Gambling (GluStV) in 2021, creating a federal licensing structure with strict product restrictions. Greece established its Hellenic Gaming Commission, and Romania’s ONJN brought in comprehensive online regulations.

Countries that have not established their own online gambling frameworks continue to allow offshore operators to serve their players under MGA, Curacao, Gibraltar or Isle of Man licences. This creates a dual-track global market: nationally regulated jurisdictions where only locally licensed operators can legally operate, and open markets where international licence holders compete freely.

The World’s Most-Visited Online Gambling Domains

The following table ranks the 17 highest-traffic online casino and betting domains globally, based on monthly visit data from Semrush, SimilarWeb and Ahrefs. Traffic figures represent estimated monthly visits as of early 2026. Mobile share, year-on-year growth and primary market are included for context.

The data reveals several structural trends. Africa accounts for three entries (SportyBet, Bet9ja and 1xbet.ng, all concentrated in Nigeria), with mobile traffic ratios above 90% in each case. South Africa contributes a further two domains through its Betway-Hollywoodbets duopoly. Latin America is represented by Caliente in Mexico, Betano in Chile and BetOnline drawing significant Argentine traffic. The traditional European regulated markets (UK, Spain, Italy, France, Greece) each place one domain in the top 17, all state-licensed or nationally regulated operators.

Operator Profiles

Stake.com

Stake ranks first globally in the SimilarWeb gambling category. Founded in 2017, the platform has processed over 300 billion bets and reports approximately 25 million registered users. GGR growth of roughly 80% compared to 2022 positions it as one of the fastest-scaling operators in the industry. Stake’s early infrastructure was built on SoftSwiss technology, scaling from 15 games at launch to its current position. Canada is the largest traffic source, with direct visits accounting for the majority of sessions.

SportyBet

SportyBet has overtaken Bet9ja as the most-visited gambling platform in Nigeria. Its mobile-first strategy is reflected in the numbers: 66.8M of its 69.83M monthly visits come from mobile devices. Direct traffic accounts for 87% of visits, indicating strong brand recognition in its core market. The audience skews 79% male.

Caliente.mx

Caliente is the most-visited gambling site in Mexico and briefly ranked as the number one global gambling domain in January 2026, recording over 65M visits that month. The brand operates through Caliplay, a joint venture with Playtech, which holds a 30.8% stake. Direct traffic accounts for 44% of visits.

Chumba Casino

Chumba Casino is the dominant sweepstakes casino in the United States, operated by VGW Holdings with an estimated 90%+ share of the US sweepstakes market. Its audience profile is unusual for online gambling: 56.8% female, with the core demographic aged 35 to 44. VGW reported net profit of A$491M in its most recent audited year, making it one of the most profitable private gambling companies globally.

Bet365

Bet365 serves over 80 million customers worldwide and holds licences across dozens of jurisdictions, including the UKGC. Gaming revenue grew 25% in the most recent reporting period, with sports betting revenue up 5%. The company is in an active investment cycle that has compressed short-term profitability. The 38.41% year-on-year decline in bet365.com traffic likely reflects the continued fragmentation of its web presence across country-specific domains rather than an actual reduction in customer activity.

Betway and Hollywoodbets (South Africa)

Betway and Hollywoodbets form a duopoly controlling an estimated two-thirds to three-quarters of the South African online gambling market by deposits. Betway reports 5.3M monthly active users, up 14% year on year, and holds approximately 23% to 24% of the market by deposit volume. Parent company Super Group disclosed R10.8bn (approximately €544M) in South African revenue for 2024. Hollywoodbets remains privately held, with estimated GGR of around R16bn.

Gamdom

Gamdom has recorded traffic growth of approximately 37% period on period, with New Zealand and Canada as its primary markets. Desktop usage is notably high at 56% among Canadian visitors, an outlier in an industry that has shifted decisively toward mobile. Global rank sits around 6,542.

Loteriasyapuestas.es

The Spanish state lottery operator SELAE runs loteriasyapuestas.es as the country’s most-visited gambling domain. Its audience skews older than most operators on this list, with the core demographic aged 45 to 54. SELAE reported €9.96bn in turnover and €2.19bn in net profit in its 2023 filing, the latest available.

Sisal.it

Sisal was acquired by Flutter Entertainment for €1.9bn in August 2022 and operates as Flutter’s primary brand in Italy. Online revenue grew 41% in 2024. Italy overtook the UK as Europe’s largest gambling market in the same year, with total GGR reaching approximately €21.6bn.

Stoiximan.gr

Stoiximan is the largest sports betting and casino operator in Greece, where it also holds a dominant position in Cyprus. Parent company Kaizen Gaming operates the Betano brand in Romania, Chile and other markets, with estimated group revenue exceeding €500M.

FDJ (fdj.fr)

FDJ is France’s state-licensed lottery and betting operator, listed on Euronext. The group reported pro-forma revenue of approximately €3.8bn in FY2024. FDJ’s latest full-year results confirmed its position as one of Europe’s largest gambling operators by revenue, with digital channels growing as a share of total activity.

1xBet Nigeria

1xbet.ng recorded the highest year-on-year traffic growth in this dataset at 87.71%. The platform serves over 60,000 monthly events. Its Nigerian domain ranks 175th nationally, with a bounce rate of 39.2%, suggesting relatively strong user engagement for the market.

Revenue and Financial Scale

Traffic and revenue do not always correlate neatly. Some of the highest-traffic domains generate modest revenue per visit, while lower-traffic operators with premium customer bases report substantially higher earnings. The following breakdown separates publicly verified financials from estimates and private disclosures.

Among operators with audited or publicly filed revenue data, bet365 leads with £4.04bn (approximately $5.1bn) in revenue for the financial year ending March 2025, filed via Companies House. FDJ reported €3.18bn for 2024, drawing from its Euronext listing disclosures. SELAE’s €9.96bn turnover figure is the highest gross number in this dataset, though it reflects lottery turnover rather than net gaming revenue; net profit of €2.19bn provides a clearer comparison. VGW Holdings, Chumba Casino’s parent, reported A$6.1bn (approximately $3.94bn) in FY2024 revenue with net profit of A$491M, making it the most profitable private operator in this group. Sisal’s online segment grew 41% in 2024 as part of Flutter’s Italian operations, within Italy’s total GGR of approximately €21.6bn. Betway’s South African operation generated R10.8bn (approximately €544M) in 2024, per Super Group’s public disclosures.

The picture is less clear for operators that do not file publicly. Stake’s GGR has been estimated at approximately $4.7bn for 2024 by Forbes, though this figure is unverified and the company remains private. SportyBet does not disclose revenue. Caliente ranked as the world’s most-visited gambling site in January 2026 but is privately held with no revenue filings. Hollywoodbets’ estimated GGR of approximately R16bn comes from industry estimates rather than audited data. Kaizen Gaming (Stoiximan/Betano parent) is estimated to generate over €500M in group revenue but has not disclosed precise figures.

The gap between traffic rankings and revenue rankings is significant. Bet365, ranked fifth by traffic on this list, generates more verified revenue than the top four domains combined based on available data. Conversely, Stake leads global traffic by a wide margin but relies on unverified estimates for its financial profile. This disconnect highlights why traffic data alone is insufficient for assessing the commercial weight of an operator.

What the Data Tells Us

Three patterns stand out from this analysis.

First, geographic concentration is shifting. Africa and Latin America now account for nearly half the domains in the global top 17 by traffic. Nigeria alone contributes three entries. South Africa’s duopoly between Betway and Hollywoodbets commands combined monthly traffic above 60M visits. Mexico’s Caliente briefly topped the global rankings in January 2026. These markets are growing faster than mature European jurisdictions, and operators with early-mover advantages in these regions are building positions that will be difficult to challenge.

Second, the regulatory split between nationally licensed and offshore-licensed operators is widening. Every European domain in this list operates under a national licence: UKGC for bet365, DGOJ-affiliated for Loteriasyapuestas.es, ADM for Sisal, HGC for Stoiximan, ANJ for FDJ. Meanwhile, several of the highest-traffic global domains operate primarily under offshore or international licensing frameworks. As more countries move toward local regulatory regimes, the addressable market for offshore-licensed operators will continue to shrink, even as their current traffic numbers remain high.

Third, the revenue gap between verified and estimated figures should concern any analyst relying on traffic as a proxy for commercial scale. The most financially transparent operators in this dataset (bet365, FDJ, VGW, Super Group) are not necessarily the ones with the highest traffic. Conversely, several traffic leaders operate with minimal public financial disclosure. Until that changes, traffic rankings provide a useful but incomplete picture of where value sits in the global online gambling market.

The industry that started with 18 games on InterCasino in 1996 now generates over $100bn annually and reaches players on every continent. The operators in this ranking represent the front line of that expansion, though their long-term positions will depend less on current traffic and more on how they navigate the regulatory fragmentation that is redefining the market’s structure.

Source: Semrush, SimilarWeb, Ahrefs, company filings, regulatory disclosures