Sergej Kostenko is the CEO and Founder of Nothreat, the London-based developer of an AI-powered preemptive cybersecurity platform. With over 15 years of experience in cybersecurity and network defense, he focuses on building systems that can detect, adapt, and neutralize threats in real time.

Before founding Nothreat, Sergej led international security projects across Europe and the Middle East, helping enterprises modernize and automate their cyber defense operations. Today, he continues to drive Nothreat's mission to bring preemptive, self-learning cybersecurity to large organisations including banks, telecoms and the public sector.