Autonomous offensive security firm XBOW on Wednesday announced raising $35 million in an extension of the Series C funding round announced earlier this year.
The initial Series C, in which it raised $120 million, increased the company’s valuation to more than $1 billion. The latest investment brings the total raised by XBOW to more than $270 million.
The new funding came from Accenture Ventures, DNX Ventures, Liberty Global Tech Ventures, NVentures, Samsung Ventures, and SentinelOne S Ventures.
The money will be used to further accelerate go-to-market and international growth efforts.
XBOW has developed a platform that leverages AI reasoning and adversarial workflows to continuously test applications for vulnerabilities, operating autonomously to quickly identify and validate security holes.
The platform executes targeted attacks autonomously, allowing security teams to explore deeper attack paths than traditional testing typically allows. Every potential finding is independently validated through real exploitation, and security teams are provided reproducible proof to eliminate theoretical risks.
XBOW aims to free up security experts’ workload, enabling them to focus on investigation, judgment, and remediation.
“The attacker’s point of view is foundational to defense, but difficult to operationalize. XBOW changes this by surfacing exploitable and novel findings at machine speed,” said Alex Krongold, director of Corporate Development & Ventures at SentinelOne. “Each XBOW agent operates like an extension of our in-house red team, allowing us to scale offensive testing with speed and depth that was previously out of reach.”
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