Arena hits $100 million annualized revenue run rate

The AI evaluation platform Arena has reached an annualized revenue run rate of $100 million just eight months after launching its first commercial product, the company announced. The milestone highlights the rapid growth of a business that began as a university research project and now sells performance analytics to major AI developers and enterprises.

Arena, which spun out from a UC Berkeley research initiative known as LMSYS, is best known for its free, crowdsourced leaderboard where users compare anonymous AI model responses and vote for the better one. The platform has recorded more than 700 million conversations and 82 million votes from over 10 million monthly visitors, ranking models across text, coding, vision, and image generation tasks.

The company began generating revenue in September 2025 with the introduction of AI Evaluations, a service that provides detailed performance analysis based on feedback from its user community. By December 2025, the service had reached a $30 million annualized consumption run rate. That figure has since more than tripled to the current $100 million run rate.

Company co-founder and CEO Anastasios Angelopoulos clarified that the revenue is...