Critical Start is a cybersecurity company founded in 2011 by Rob Davis, specializing in Managed Detection and Response (MDR) services. The company provides 24x7x365 security monitoring, investigation, and response capabilities to organizations seeking to detect and mitigate cyber threats. Their core MDR offering delivers continuous signal coverage across both IT and OT environments, with the goal of eliminating blind spots and reducing the risk of breaches. Critical Start combines automated security intelligence with human analyst expertise to investigate alerts and respond to potential threats. Services are backed by contractual SLAs and offered with flexible deployment options. In addition to MDR, Critical Start offers professional services including incident response and cybersecurity assessments. Their team publishes threat intelligence research, including analysis of ransomware tactics, phishing, vulnerability exploitation, and data extortion trends. The company targets mid-to-large enterprises across various industries that require managed security capabilities without building a fully in-house security operations function. Critical Start positions its approach as human-centric, emphasizing analyst-driven investigation alongside technology integration. Leadership includes a CEO, CTO, CISO, Chief Product Officer, and Chief Customer Officer, reflecting a structure oriented around both technology development and customer outcomes. The company is headquartered in the United States and maintains engineering operations in India.