Group Behind Chatbot Arena Raises Funds for $600 Million Startup (1)

May 21, 2025, 3:53 PM UTC

Chatbot Arena started as an academic project, where researchers and students at the University of California at Berkeley worked to evaluate the capacity of artificial intelligence tools. Now, the group has spun out into a new company, called LMArena, that’s raised $100 million in seed funding from a slate of A-list investors.

Andreessen Horowitz and UC Investments — which manages an investment portfolio for the University of California — led the fundraising, which the company plans to announce Wednesday. The deal includes backing from Lightspeed Venture Partners, Felicis Ventures and Kleiner Perkins, among others, the company said.

The round values LMArena at $600 million, according to people familiar with ...

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