Mandiant (Google Cloud Security)

Mandiant's name became synonymous with elite incident response after it exposed APT1 (China's PLA Unit 61398) in a landmark 2013 report that triggered the first-ever public attribution of state-sponsored cyberattacks on US companies. Google acquired Mandiant for $5.4B in 2022, integrating its elite threat intelligence (covering 1,000+ adversary groups) and incident response capabilities into Google Cloud Security. The Mandiant Threat Intelligence feed is considered the gold standard for understanding nation-state actors — it provides the context that converts security alerts into actionable intelligence about who is attacking and why. Kevin Mandia's memoir 'Incident Response: A Guide from the Field' is required reading in the security industry.