Arena started as a research experiment and is now becoming how the AI industry checks whether models and agents work and behave safely and truthfully, measured across millions of real interactions.

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Funding Events

Date	Amount	Type	Investors	Valuation
10/14/26	$200,000,000	Series B	01 Advisors aCrew Capital AMP PBC Andreessen Horowitz Dell Technologies Capital Endeavor Catalyst Felicis Ventures Khosla Ventures Lightspeed Venture Partners Panos Madamopoulos QuantumLight Capital Salesforce Ventures The House Fund	$3,100,000,000