Arena Raises $200M Series B at $3.1B Valuation, Tops $100M Annualized Revenue
arena · x · 2026-10-09
Arena announced a $200M Series B at a $3.1B valuation, co-led by Lightspeed and Khosla Ventures with participation from Salesforce Ventures, a16z, Felicis and others. Since its January 2026 Series A, the AI evaluation platform has surpassed $100M annualized revenue and launched the Arena Alignment Index to measure how well frontier models act in line with human intent.
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