LMArena secures USD 150 million Series A funding

LMArena, an AI evaluation platform, raised USD 150 million in Series A funding. The round was led by Felicis and UC Investments with top investors joining in.

Funding details: USD 150 million (Series A)

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LMArena has raised USD 150 million in a Series A funding round led by Felicis and UC Investments, the investment arm of the University of California. The round also included participation from Andreessen Horowitz, The House Fund, LDVP, Kleiner Perkins, Lightspeed Venture Partners, and Laude Ventures. You can read the official announcement [here].

The funding comes as LMArena has seen huge growth in its community and usage. Since its USD 100 million Seed round last year, the platform has grown over 25 times in active participation. The community has contributed 50 million votes across text, vision, web development, search, video, and image tasks, along with 400 new model evaluations and 145,000 open-source battle data points.

The company says the funding will help meet rising demand from AI labs and enterprises that need clear, reliable insights into model performance. LMArena’s platform helps measure AI in real-world scenarios, providing diverse and expert-level data, testing environments aligned with human use, and rigorous evaluation methods.

“This funding lets us move faster to build new features and improve the platform for everyone using it,” the LMArena team said. They also thanked their community for helping shape AI evaluation, calling them the backbone of responsible AI development.

With this Series A, LMArena plans to continue expanding its platform throughout 2026, aiming to become a key part of the modern AI ecosystem.