
ActZero, a cybersecurity firm specializing in Managed Detection and Response (MDR), offers a comprehensive, AI-driven security platform designed for smaller organizations. Their service provides 24/7 full-stack security coverage across endpoints, networks, mobile devices, cloud, email, and identity. ActZero differentiates itself through its AI Advantage for faster threat detection and response, and its human-led response capabilities. The company has achieved significant milestones, including being recognized by Gartner and winning the 2022 SC Awards for Best MDR Service, with over 100 employees worldwide. Their business model appears to be service-based, delivering enterprise-grade security at an affordable price point.

ActZero, a cybersecurity firm specializing in Managed Detection and Response (MDR), offers a comprehensive, AI-driven security platform designed for smaller organizations. Their service provides 24/7 full-stack security coverage across endpoints, networks, mobile devices, cloud, email, and identity. ActZero differentiates itself through its AI Advantage for faster threat detection and response, and its human-led response capabilities. The company has achieved significant milestones, including being recognized by Gartner and winning the 2022 SC Awards for Best MDR Service, with over 100 employees worldwide. Their business model appears to be service-based, delivering enterprise-grade security at an affordable price point.
Business: AI-driven Managed Detection and Response (MDR) cybersecurity services
Founded / HQ: Menlo Park (founded 2019)
Notable funding: $40M seed announced Mar 9, 2021; Series A on Jan 14, 2022
Acquisition: Acquired by WatchGuard (announced Jan 8, 2025)
Cybersecurity — threat detection and incident response for small and mid-sized organizations
2019
Cybersecurity
$40,000,000
Seed announced as $40M
Series A announced on Jan 14, 2022; public summaries obfuscate amount