Darktrace

Darktrace revolutionized threat detection by using advanced machine learning to understand the normal "pattern of life" for every user and device on a network, allowing it to autonomously respond to zero-day threats in seconds. Rooted deeply in Cambridge AI research, it provides a highly intelligent, proactive defense system for enterprise networks.

Founded by Cambridge mathematicians and intelligence experts; acquired in late 2024 by US private equity firm Thoma Bravo for $5.3 billion, though it preserves its massive R&D operations in the UK.