Arena, the AI-powered leaderboard everyone uses, is now a $100 million company

Just eight months after launching its commercial service, the AI ​​leaderboard provider The arenawhich originated as a research project at UC Berkeley in 2023, has reached $100 million in annual run rate revenue.

Arena is known for its popular leaderboard of AI model performance, built from over 10 million user ratings. The consumer website allows the user to write a claim that they submit to two forms; Next, the user chooses the model that did the best job.

While Arena’s popular AI model leaderboard is free for public use, the company began generating revenue from its platform in September when it introduced Artificial intelligence assessmentsa service that provides model labs and organizations with deep performance analytics gathered from their community.

Arena’s rapid revenue growth shows that its commercial offering is as popular among customers as it is with its community of residents, who are very much attracted to the platform for early access to the latest, often unreleased, AI models.

“A lot of people don’t even understand that our business makes any money at all; people still view us as an open source project,” Anastasios Angelopoulos, co-founder and CEO of Arena, told TechCrunch.

While Arena calls its revenue milestone ARR, which is the term it traditionally stands for Annual recurring revenueAngelopoulos explained that the company charges customers for “consumption,” meaning its revenue is non-recurring.

Although Arena has no direct competitors, Yupp, another crowdsourced AI model selection startup, close In March – Angelopoulos said the company was competing “for the same dollar” with human labeling startups like Mercor, Surge and Scale AI, all of which help modellers improve their AI during the post-training phase.

As AI providers seek to maximize model performance, their appetite for post-training optimization services continues to rise. When Arena announced in January that it had raised a $150 million Series A at a post-cash valuation of $1.7 billion, its annual revenue was 30 million dollars.

Elsewhere, Handshake’s total annual revenue from AI training has nearly doubled since January, rising from $550 million to nearly $1 billion, according to The Information. I mentioned In April. Mercur’s annual revenues also surpassed $1 billion earlier this year, up from $500 million last September. According to To the information.

Arena classifies models according to a variety of tasks such as text, encryption, vision, and image generation, as well as complex and long-running workflows through the recently introduced proxy mode.

Along with Angelopoulos, Arena was co-founded by fellow UC Berkeley postdoctoral student Wei-Lin Chiang, who serves as the startup’s CTO. The startup was also co-founded by Ion Stoica, a renowned UC Berkeley professor and co-founder of Databricks who advised the project before it was incorporated as a company in April 2025.

Arena has raised a total of $250 million from investors including Felicis, Andreessen Horowitz, The House Fund, LDVP, Kleiner Perkins, Lightspeed Venture Partners, Laude Ventures, and UC Investments.