35 Most Visited Online Casinos in May 2026

As of May 2026, the online casino SEO space continues to exhibit significant fragmentation amongst mass-market sportsbook-lead operators, regulated regional brands and crypto–native casinos. Even though a small number of dominant operators control most of the visible marketplace organically, there is increasing volatility in the marketplace amongst mid-tier operators due to changes in algorithms, regional regulatory changes and aggressive brand growth strategies.

The data for the month, based on Ahrefs, shows that African and Latin America sportsbooks continue to scale extremely quickly regarding organic traffic, while several established brands based in Europe are experiencing sustained losses in the marketplace. Also, crypto-first and hybrid platforms are simultaneously building upon momentum in niche search engine results within their respective niches.

Most Visited Online Casinos

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Organic visibility in online gambling is being outperformed by operators like Hollywoodbets.net and Sportybet.com. The primary example of this is how Hollywoodbets has seen an increase in organic traffic to 85.5 million, which is an extremely dominant growth overall.

Both Betika and Betway have maintained a strong presence in the online gambling market, but both show signs of stagnation and mild declines and may be indicative of a market that is maturing. Traditional operators like bet365.com, William Hill.com, and 888 Casino.com have been experiencing continued declines in organic visibility.

Bet365, in particular, has had major decreases in both its organic traffic and its value, indicating either a decline from search engines or increased competition from localized affiliates and new brands.

William Hill has also continued to see declines and has lost approximately $1.9 million in value, further illustrating the overall decline of major UK-based operators.

The online casino market in the US is continuing to see high competition, but very uneven competition, relative to the market.

Organic Traffic Top Gainers

• BetRivers.com (+596.5%)
• 1win.com (+582.0%)
• hollywoodbets.net (+87.0%)
• Betano.com (+36.6%)
• Fanatics Casino (+35.4%)

Organic Traffic Top Decliners

• 888 Casino (-25.3%)
• Unibet Casino (-24.8%)
• BC.Game (-23.3%)
• LeoVegas.com (-16.2%)
• Bet365.com (-16.0%)

Spotlight of the Month: Paddy Power

The standout performer of the month is Paddy Power which showed an increase of +574k in organic traffic and $973k in organic value.

Strong seasonal content alignment, recognition in search engine result pages from branded and non-branded queries, integration of editorial content with sportsbook funnels and increased authority in competitive UK betting search engine results pages could be contributing to Paddy Power this month’s performance.

Unlike their competition who is experiencing declines in visibility, Paddy Power shows that legacy brands can still scale their SEO performance with a tightly aligned content strategy in conjunction with real-time betting cycles and user intent.

The overall online gambling market is becoming more fragmented, regionally focused, and much more competitive. Currently, search engine optimization performance will be increasingly based on localization, the rapid creation and development of website content, and adaptability as an online gambling operator, rather than on established brand equity alone.

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