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US cybersecurity startup bets $200m on London expansion

Marcus Chen
Managing Editor · Tuesday, October 20, 2026 at 9:19 AM · 1 min read
US cybersecurity startup bets $200m on London expansion — City AM, London Technology news
Image: City AM

A US cybersecurity startup valued at $3.5bn is opening a new London hub as part of a $200m expansion across Europe, the Middle East and Africa, creating 200 jobs as demand for cyber defences surges. Chainguard, backed by investors including Sequoia Capital, Lightspeed and General Catalyst, will establish its regional headquarters in Clerkenwell as it expands its engineering, sales and customer support teams. The investment comes as Britain seeks to attract more overseas tech investment, while a fresh wave of cyber attacks on major retailers has exposed the growing cost of security breaches. Chainguard, which specialises in securing open-source software, said AI was making it easier for hackers to exploit weaknesses in widely used applications. Pulling open source straight from public registries is like picking a USB stick up off the pavement and plugging it into your laptop , said Ian Burley, the company’s EMEA vice president. Maybe you could survive that when finding

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