DomainTools

DomainTools

DomainTools was founded in 2005 by Tim Chen, who remains CEO. The company is a private, venture-backed cybersecurity firm — not a family office or asset manager. Its core product is a DNS-based threat intelligence platform that ingests domain registration, Whois, and passive DNS data to identify malicious domains before they are used in attacks. The platform combines predictive risk scoring with the world's largest passive DNS database, covering over 97% of internet infrastructure. DomainTools serves enterprise SOC teams, MSSPs, and government agencies. Key capabilities include real-time threat feeds, API integrations, and guided pivots that link DNS identifiers to accelerate investigations. The company maintains a partner network including VARs, distributors, and cybersecurity product vendors. It does not disclose revenue, funding, or investment returns. DomainTools employs a leadership team that includes CFO Christine Gadsby, Chief Strategy Officer Jason Steer, CISO Mike Eves, and VP of Engineering David Krizan. The company publishes research and a podcast called 'Breaking Badness' and offers webinars and white papers. No recent operational event (within 24 months) was publicly verified. DomainTools competes directly with RiskIQ (acquired by Microsoft) and other threat intelligence platforms. Its structural differentiator is the longevity and breadth of its DNS dataset — over 20 years of historical records — which cannot be easily replicated by newer entrants. The firm is structured as a private company, not a family office, and is owned by institutional investors and founders.