Online gambling has long since stopped being a niche form of entertainment that people were embarrassed to admit they liked. In 2025, it’s a large, billion-dollar industry with millions of visitors and thousands of service providers. The rise of mobile betting, live casinos, and enhanced safety standards all contributed to the wild popularity of gambling — however, some gambling companies stand out from the sea of others.
They enjoy global reach, hold various licenses, and boast of years of experience along with stellar reputations. What are they like, and how did they manage to grow to such an extent? Let us present the pick of the 5 biggest online gambling companies in the world.
Criteria for Ranking
To perform an actual fact-backed evaluation, experts need to develop a list of criteria and judge every company with its help. The same principle pertains to the entire gambling industry because it inspires trust and establishes fairness. This way, people who want to play online pokies real money NZ can check the recs of gambling professionals and choose a casino based on its bonus offer, license, experience, or type. Similarly, we selected the world’s biggest gambling companies following the criteria we’ve set up. They include:
- Experience. The older a company is, the more reliable it seems and the more experience it has.
- Revenue. Numbers matter a lot, so we looked at how much different gambling companies earn in pure revenue.
- Diversity. The more titles and gambling verticals a company covers, the bigger the number of points we attribute to it.
- Compliance. A gambling company must be compliant with the regulations of its state — we refused to consider other options.
We paid attention to other, smaller nuances, too, but these four criteria played the largest role in our assessment. Now, on to our pick.
Company 1: Flutter Entertainment
Flutter Entertainment entered the market in 2016, but only nominally. In reality, it’s been around for decades, stretching back to the early 2000s — we simply knew it under different names and brands, such as PokerStars, BetFair, and Paddy Power.
As a popular gambling provider, Flutter Entertainment receives almost 14 million players on a monthly basis. These are impressive numbers, especially when you consider its revenue. It reached 14.05 billion U.S. dollars in 2024, with the prediction of rising even more by the end of 2025. This fact alone makes Flutter one of the biggest online gambling companies.
Flutter Entertainment is certainly diverse as it operates gambling, sports betting, and poker segments. It works with regulated markets only, holding UKGC, MGA, and other licenses, which makes it credible and underlines its legitimacy. Without doubt, it’s a huge and profitable company, and every person interested in gambling should give its products a go.
Company 2: Entain
Entain was known as GVC Holdings in the past. It appeared in the 1990s, collecting experience in different sectors before arriving at its gambling specialization. Today, it’s one of the most popular gambling companies that earns around 5 billion dollars annually.
In terms of diversity, Entain deserves another top spot. It has a large portfolio that includes casinos, sports betting, bingo, poker, etc. As for safety, gambling companies like this use professional solutions to protect their payments and detect fraud, which makes them reliable and trustworthy. Entain follows this principle, so its users never have anything to worry about.
Company 3: DraftKings
DraftKings is a unique gambling corporation. It started operating in 2012 as a fantasy sports company, but later on, it evolved to become a huge organization dealing with gambling and sports betting.
With an annual revenue of nearly 5 billion dollars, DraftKings demonstrates regular growth, with more and more users joining it regularly. It’s extremely diverse, handling casinos, sportsbooks, fantasy sports, and now even a digital lottery. It doesn’t cover everything, though, so if you want to play new Aussie online pokies on trusted platforms, you’ll have to look elsewhere. On the positive side, DraftKings sticks to strict US regulations, so it’s a tried and tested company known for its safety.
Company 4: Bet365 Group Ltd.
Bet365 was founded in 2000 in the UK, and from that point on, it’s been dedicated to promoting the culture of online gambling. It’s a privately owned company with revenue of about 4 billion dollars per year, and it runs poker, sports betting, and streaming services.
Bet365 is licensed by the UKGC, Gibraltar, and Malta, so it meets all our safety and diversity criteria. Right now, it’s expanding to cover the gambling-regulated US states, too, so if you’re from America, you can anticipate the chance to check it out.
Company 5: MGM Resorts International
This is the last name in our list of the biggest gambling companies in the world, but just because it assumed the fifth place doesn’t mean that it loses to our previous recs in any way. MGM is a legend: it’s difficult to find a person who wouldn’t have heard about it. It’s been operating for decades, although its BetMGM segment was launched in 2018, earning over $2 billion annually.
BetMGM offers sports betting, as you can probably derive from its name, in addition to gambling and poker. It’s fully licensed and follows US laws to a T. The best and most unique part is that you can combine your stay at luxurious MGM hotels together with your sports betting or gambling experience. This fact will let you earn loyalty points and use them all over the MGM resorts and activities in the future.
