Horizon3.ai hits $2 billion valuation in $250 million funding round

Horizon3.ai announced a $250 million Series E funding round at a valuation exceeding $2 billion, tripling its previous $650 million valuation from its Series D round just over a year ago. The oversubscribed round was co-led by existing investors NightDragon and NEA, with participation from seven new investors and five returning backers, underscoring accelerating global demand for autonomous security validation as AI-driven cyberattacks escalate.

Horizon3.ai has announced a $250 million Series E at a valuation of more than $2 billion, tripling its valuation from $650 million at Series D in just over a year. The oversubscribed round was co-led by existing investors NightDragon and NEA, with participation from seven new investors and five returning backers. The capital underscores accelerating global demand for safe, autonomous security validation as AI-driven cyberattacks escalate. “We invented the concept of AI Hackers and spent … More https://www.helpnetsecurity.com/2026/08/03/horizon3-ai-250-million-funding/ The post Horizon3.ai hits $2 billion valuation in $250 million funding round https://www.helpnetsecurity.com/2026/08/03/horizon3-ai-250-million-funding/ appeared first on Help Net Security https://www.helpnetsecurity.com .