Arena, a crowdsourced AI leaderboard platform, is reaching $100 million in annualized revenue, according to multiple outlets. Arena is known for a free leaderboard that lets users compare two anonymous AI model responses side by side and vote on which answer is better. Several sources state that the company launched its first commercial product in September, and that the revenue milestone is reached about eight months later. One source also describes Arena as originating from a UC Berkeley research project in 2023. Overall reporting aligns on the product’s core function—community-driven evaluation of AI responses through pairwise, anonymous comparisons—and on the timing of the move from free use to commercial offerings. The outlets frame the milestone as evidence of rapid commercial traction following the launch of its paid service.