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Arena

AIAI EvaluationB2B📍 United States

Arena is an AI evaluation platform that measures frontier AI models and agents for real-world alignment with human intent. They have raised $200 million in Series B funding at a $3.1 billion valuation to advance their mission. The company also launched the Arena Alignment Index to measure how AI deviates from human values.

Total raised
Undisclosed
tracked to date
Latest round
Series B
Oct 8, 2026
Known investors
8
led by Lightspeed Venture Partners
Press coverage
2
outlets tracked

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🏆 Featured in Datapile’s Q4 2026 USA Funding Report

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Funding history

  1. 1
    $200 Million Series BSeries BOct 8, 2026

    Led by Lightspeed Venture Partners

    Announcement ↗

Investors in Arena

Backers from this company's tracked funding rounds.

  • LLightspeed Venture PartnersLead investorVC firm
  • KKhosla VenturesVC firm
  • SSalesforce VenturesVC firm
  • 001 AdvisorsVC firm
  • DDell Technologies CapitalVC firm
  • EEndeavor CatalystVC firm
  • Aa16zVC firm
  • FFelicisVC firm

Arena in the news

Coverage of this company's funding, tracked by Datapile.

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Arena — AI startup in United States | Datapile