Horizon3.ai raised 2B valuation. SiliconANGLE cites NodeZero used by more than 6,500 organizations (up from ~3,000 at Series D), including NSA and CISA among government customers. Total funding $428.5M. ARR +120% YoY; ~300,000 production pentests. Founders Snehal Antani (ex-Splunk CTO) and Anthony Pillitiere (ex-SOCOM). Notes customer-count wording differs from company PR (>7,000).