XBOW raises $35 million Series C extension from NVIDIA, Samsung, and…

Team S · 2026-05-07T14:34:56.000Z

XBOW, an autonomous offensive security company, has raised an additional $35 million as an extension to its Series C round, bringing the total raised in that round to $155 million and total lifetime funding to over $270 million. The new investors — Accenture Ventures, NVentures (NVIDIA's venture arm), Samsung Ventures, SentinelOne S Ventures, DNX Ventures, and Liberty Global Tech Ventures — are notable for a defining characteristic: several are also XBOW customers, reflecting a growing enterprise trend of backing the autonomous security tools they actively deploy. XBOW was founded in January 2024 by Oege de Moor, who previously created GitHub Copilot. The company has built a platform that uses thousands of autonomous AI agents to continuously probe software for vulnerabilities the way a human hacker would — at machine speed and without interruption, in contrast to the periodic manual penetration tests that have historically been the industry standard. De Moor says XBOW was the first to demonstrate how large language models could be applied to offensive security at scale, reaching the top of the HackerOne leaderboard and deploying at more than 100 customers worldwide, including pharmaceutical company Moderna. The initial $120 million Series C, announced in March 2026 and led by DFJ Growth and Northzone with participation from Sequoia Capital, Altimeter, and others, valued the company at over $1 billion. The company lists Seattle as its headquarters — though its address there is a mailbox at a Pioneer Square coworking space, with founder and CEO de Moor based in Malta. The setup reflects the remote-first nature of the company, and its funding rounds count toward Seattle's venture capital totals regardless. The new capital will be used to accelerate go-to-market and international expansion, including a recently announced integration with Microsoft Security Copilot and Microsoft Sentinel. XBOW has also expanded its leadership team, appointing a Chief Marketing Officer, Chief Revenue Officer, and General Counsel, and naming a General Manager for South Korea as part of a broader Asia-Pacific push.

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XBOW raises $35 million Series C extension from NVIDIA, Samsung, and… | Newnex