Understanding who the biggest iGaming websites are depends on how you define size. Traffic alone doesn’t tell the full story, and reported revenues are often opaque or fragmented across markets. This is where Blask’s modelling framework becomes useful.
Using Acquisition Power Score (APS) and Competitive Earning Baseline (CEB), Blask estimates how much acquisition and revenue a brand could generate under standardized market assumptions. The result is not reported revenue, but a comparable, model-driven view of global scale.
Below is a structured look at the largest iGaming websites globally, followed by an explanation of what the numbers actually tell us.
How to Read the Metrics
Acquisition Power Score (APS)
APS represents a modelled acquisition range for a brand based on Blask Index values and market-level benchmark conversion assumptions. It reflects minimum, maximum, and most likely acquisition volumes if the brand performed in line with average market efficiency.
Competitive Earning Baseline (CEB, US$)
CEB converts projected APS into a modelled revenue range using standardized assumptions for retention and ARPU. It is designed for relative comparison, not as a statement of actual earnings.
Important: Both APS and CEB are expected outcomes based on standardized assumptions — not observed performance or disclosed revenue.
Biggest iGaming Websites by Competitive Earning Baseline (CEB)
| Rank | Brand | Core Markets (Blask) | APS (est.) | CEB (est.) | Countries |
|---|---|---|---|---|---|
| 1 | Bovada | US-CA, US-TX, US-GA | ~1.15M | $11.61B | 3 |
| 2 | FanDuel | US-NY, US-MI, US-PA | ~458.9K | $7.25B | 3 |
| 3 | DraftKings | US-CT, US-NY, US-IL | ~488.5K | $6.69B | 3 |
| 4 | bet365 | Brazil, UK, Italy | ~19.58M | $6.66B | 62 |
| 5 | BetOnline | US-CA, US-TX, US-FL | ~620.1K | $6.39B | 16 |
| 6 | MyBookie | US-CA, US-TX, US-FL | ~365.9K | $4.19B | 3 |
| 7 | Stake | India, Argentina, Brazil | ~4.09M | $4.04B | 102 |
| 8 | Rainbet | CA-ON, US-CA, UK | ~615.9K | $3.25B | 23 |
| 9 | BetMGM | Brazil, UK, CA-ON | ~590.6K | $2.87B | 6 |
| 10 | 1xBet | Bangladesh, India, Egypt | ~8.14M | $2.73B | 103 |
| 11 | Ignition Casino | US-CA, US-TX, US-FL | ~201.8K | $2.51B | 2 |
| 12 | Betplay | US-CA, US-TX, US-NY | ~215.1K | $2.47B | 17 |
| 13 | Betano | Brazil, Peru, Chile | ~21.97M | $2.45B | 22 |
| 14 | BetUS | US-CA, US-TX, US-FL | ~199.8K | $2.25B | 11 |
| 15 | betPawa | Tanzania, Uganda, Cameroon | ~30.76M | $2.25B | 28 |
| 16 | Roobet | India, CA-QC, Finland | ~542.9K | $2.07B | 31 |
| 17 | BetAnything | US-GA, US-SC, US-NC | ~115.2K | $1.81B | 2 |
| 18 | Betway | South Africa, Mozambique, Botswana | ~24.39M | $1.80B | 60 |
| 19 | William Hill | UK, Italy, Spain | ~2.69M | $1.68B | 52 |
| 20 | Lottomatica | Italy | ~973.3K | $1.44B | 1 |
| 21 | BranGo | US-CA, CA-ON, CA-AB | ~104.1K | $1.33B | 16 |
| 22 | Limitless Casino | US-CA, US-WA, US-TX | ~90.15K | $1.23B | 7 |
| 23 | SportsBet | AU-NSW, AU-VIC, AU-QLD | ~643.8K | $1.20B | 1 |
| 24 | Sky Bet | UK, Ireland, India | ~1.42M | $1.16B | 3 |
Largest iGaming Websites in the World by Traffic
While Blask focuses on earning power, many readers search for the largest iGaming websites based on traffic. Measured by estimated monthly visits (via tools like Similarweb, Semrush, or Ahrefs), traffic-based rankings typically look different from revenue models.
From a traffic perspective, the largest iGaming websites in the world are usually:
- bet365 – consistently the most visited gambling website globally, driven by football-heavy markets and in-play betting
- 1xBet – massive traffic volumes across Asia, Africa, and Eastern Europe
- Stake – strong direct traffic and brand-led growth, particularly among younger and crypto-native audiences
- Betway – high visibility in Africa and Europe
- William Hill – long-established brand with steady organic and direct traffic
Traffic rankings tend to favor:
- Globally accessible brands
- Strong SEO footprints
- High brand recognition and repeat usage
However, traffic does not equal revenue. A site can dominate visits while monetizing less efficiently, which is why traffic-based rankings and revenue-based rankings often diverge sharply.
Key Takeaways from the Ranking
1. US-Focused Operators Dominate the Very Top
The top three positions — Bovada, FanDuel, and DraftKings — are driven by high-value, high-intent US markets.
Despite operating in relatively few jurisdictions, their modeled earning power is enormous due to market maturity and monetization assumptions.
2. bet365 Is the Global Scale Benchmark
bet365 stands out as the largest truly global operator. Its APS is an order of magnitude higher than most US brands, spread across 60+ countries, yet its CEB remains competitive with the US giants — a sign of breadth over concentration.
3. Crypto-Native and Borderless Brands Are a Real Tier
Operators such as Stake, 1xBet, Roobet, and Rainbet demonstrate a different growth model:
- Very wide geographic coverage
- Strong acquisition across emerging and grey markets
- Less dependence on a single regulatory regime
This is reflected in high APS values and solid mid-to-upper-tier CEB rankings.
4. High APS Does Not Automatically Mean Top Revenue
Brands like betPawa and Betway show some of the highest acquisition volumes in the dataset.
However, their CEB positions are lower than US-centric operators, illustrating how market ARPU and retention assumptions shape the revenue model.
Why This Ranking Matters
This list doesn’t answer “who made the most money last year”. Instead, it answers a more strategic question:
Which iGaming websites have the greatest modeled earning power given their current acquisition strength and market mix?
For investors, affiliates, suppliers, and operators, APS and CEB provide a neutral, comparable lens on global scale — cutting through regional reporting differences, licensing structures, and opaque financial disclosures.
