In terms of internet viewing, ONE Championship surpassed the UFC in 2019. The former had 5.6 billion views across all platforms, while the latter received 3.8 billion. However, the UFC has more events (over 100) than ONE Championship (20). In terms of revenue, the UFC is clearly the winner with $1.9 billion in 2018. This makes it over twice as big as its closest competitor, ONE Championship ($900 million). There are several reasons for this. First of all, the UFC has better names that attract viewers and sponsors. For example, "Ronda Rousey" is a famous name that attracts attention easily. Second, the UFC has more events per year (around 20) than ONE Championship (12). This means the UFC is likely to earn more money overall. However, ONE Championship is growing fast and has already exceeded its revenue in some years. For example, it earned $50 million in 2015 - which is more than any other MMA organization at the time. It's possible that they will catch up soon.