Autonomous Offensive Security Firm XBOW Raises $35 Million

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.” Related: Herd Security Raises $3 Million for AI-Powered Training Platform Related: Spectrum Security Emerges From Stealth Mode With $19 Million Related: Copperhelm Raises $7 Million for Agentic Cloud Security Platform Related: Cloudsmith Raises $72 Million in Series C Funding WRITTEN BY SecurityWeek News More from SecurityWeek News In Other News: Scattered Spider Hacker Arrested, SOC Effectiveness Metrics, NSA Tool Vulnerability  Webinar Today: A Step-by-Step Approach to AI Governance In Other News: Unauthorized Mythos Access, Plankey CISA Nomination Ends, New Display Security Device Copperhelm Raises $7 Million for Agentic Cloud Security Platform In Other News: Satellite Cybersecurity Act, $90K Chrome Flaw, Teen Hacker Arrested In Other News: Cyberattack Stings Stryker, Windows Zero-Day, China Supercomputer Hack Industry Reactions to Iran Hacking ICS in Critical Infrastructure: Feedback Friday Webinar Today: Why Automated Pentesting Alone Is Not Enough Latest News Herd Security Raises $3 Million for AI-Powered Training Platform Iranian APT Intrusion Masquerades as Chaos Ransomware Attack Romanian Man Extradited to US for Role in Hacking Scheme 17 Years Ago CISA Launches ‘CI Fortify’ to Prepare Critical Infrastructure for Geopolitical Cyber Conflict Sophisticated Quasar Linux RAT Targets Software Developers Government, Scientific Entities Hit via Daemon Tools Supply Chain Attack Oracle Debuts Monthly Critical Security Patch Updates Palo Alto Networks to Patch Zero-Day Exploited to Hack Firewalls Trending Webinar: ROSI For CPS Security Programs May 13, 2026 In cyber-physical systems (CPS), just one hour of downtime can outweigh an entire annual security budget. 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