How Big Is the Online Gambling Market?
The global online gambling market is valued at roughly $95-100 billion in 2025 and projected to exceed $150 billion by 2030 — driven by mobile growth, US state-by-state legalization, and emerging verticals like prediction markets.
The global online gambling market reached approximately $95-100 billion in gross gaming revenue (GGR) in 2025, with projections placing it at $150-180 billion by 2030. Growth is driven by mobile penetration, US market expansion, and the emergence of new verticals like prediction markets.
Market Size by Segment
Online Casino
The largest segment, accounting for roughly 35-40% of total online GGR. Slots dominate, but live dealer games are the fastest-growing subsegment, with operators like Evolution Gaming reporting consistent double-digit growth.
Key driver: Mobile casino sessions now account for 70%+ of total play in mature markets. The shift from desktop to mobile isn't slowing — it's accelerating as operators optimize mobile UX and game providers build mobile-first titles.
Sports Betting
Roughly 30-35% of online GGR globally. The US market has been the growth story since the 2018 PASPA repeal, with legal US sports betting handle exceeding $120 billion in 2025 across 38+ legal states and jurisdictions.
Key driver: In-play (live) betting now represents 60-70% of sports betting handle in mature European markets and is growing rapidly in the US. The data infrastructure required for in-play betting creates significant barriers to entry.
Poker
A smaller but stable segment at roughly 5-8% of online GGR. Growth has plateaued in mature markets, but new regulatory openings (notably shared liquidity pools across jurisdictions) provide periodic boosts.
Prediction Markets
The newest segment, still small relative to traditional verticals but growing explosively. Polymarket and Kalshi combined processed roughly $6 billion in trading volume between June 2025 and January 2026. This is not yet captured in traditional iGaming market sizing, but operators are paying attention.
Market Size by Region
| Region | Estimated Online GGR (2025) | Growth Rate |
|---|---|---|
| Europe | $35-40B | 5-7% CAGR |
| North America | $25-30B | 15-20% CAGR |
| Asia-Pacific | $20-25B | 8-12% CAGR |
| Latin America | $5-8B | 20-30% CAGR |
| Rest of World | $5-8B | 10-15% CAGR |
Europe remains the largest market by revenue, but growth is moderating as markets mature. The UK, Italy, Sweden, and Denmark are heavily regulated with high tax rates that constrain GGR growth.
North America is the fastest-growing major market, driven almost entirely by US state-by-state legalization. Canada's single-event sports betting legalization (2021) added another significant market.
Latin America is the highest-growth region percentage-wise, with Brazil's regulation of online betting (effective 2025) opening the largest untapped market in the hemisphere.
What's Driving Growth
Regulatory expansion: The trend toward legalization continues globally. Each new jurisdiction that legalizes online gambling adds addressable market. The US alone adds 2-4 states per year.
Mobile-first experiences: As smartphone penetration approaches saturation in developed markets, the friction of gambling online continues to decrease. Payment integrations (Apple Pay, Google Pay, crypto) reduce deposit friction further.
New verticals: Prediction markets, social casino crossovers, and esports betting create new entry points for users who wouldn't engage with traditional casino or sportsbook products.
AI personalization: Operators using AI-driven lobby personalization, bonus optimization, and player lifecycle management report 10-25% increases in revenue per user. This compounds across the installed base.
What Operators Should Know
The market is large and growing, but increasingly competitive. Customer acquisition costs are rising (€150-400+ per depositing player in mature markets), making retention and lifetime value optimization critical.
The operators winning market share are those investing in technology — personalization, data infrastructure, and new product verticals — rather than competing purely on marketing spend.
Adkuu helps operators capture more value from this growing market through AI-powered personalization (AI Sphere) and prediction market infrastructure (Adkuu Pulse) — the two product categories with the highest incremental revenue potential for existing operators.
Market estimates compiled from H2 Gambling Capital, Statista, Grand View Research, and operator public filings. Figures are approximate and vary by methodology. Last verified: March 2026.