Farsight Security
Track on RadarAcquired by DomainTools · 2021 · news
Farsight Security provides passive DNS observation data for threat intelligence.
- Total raised
- —
- Employees
- 18
- Founded
- 2013
- Momentum
- 22
Stalling
Data updated August 2026
About
About Farsight Security
At a glance
Farsight Security is a cybersecurity company specializing in Threat & Vulnerability Management, founded in 2013 and headquartered in San Mateo, United States. It employs about 18 people and was acquired by DomainTools in 2021.
Farsight Security is a cybersecurity intelligence company, now operating as a subsidiary of DomainTools following an acquisition. The company specializes in DNS (Domain Name System) observation data, providing visibility into DNS activity to support threat detection, investigation, enrichment, and mitigation use cases. Farsight's core product is DNSDB, a database that aggregates and indexes passive DNS data — historical and real-time records of DNS resolutions collected from sensors across the internet. This dataset enables security analysts and researchers to trace the history of domain names, IP addresses, and name server relationships, which is useful for uncovering malicious infrastructure, tracking threat actors, and performing incident investigations. Following the DomainTools acquisition, Farsight's DNS observation data is combined with DomainTools' broader internet intelligence data, which includes domain registration (WHOIS) and related data points. This integration is intended to extend the timeline and context available when identifying emerging threats originating outside an organization's network perimeter. Farsight's data and products are primarily used by threat intelligence teams, security operations centers (SOCs), and incident responders. Its resources, user guides, and product interfaces have been migrated to the DomainTools platform. The company's historical focus has been on passive DNS data as a foundational layer for internet infrastructure intelligence and threat analysis.
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FAQ
Frequently asked questions about Farsight Security
When was Farsight Security founded?▾
Farsight Security was founded in 2013.
Where is Farsight Security headquartered?▾
Farsight Security is headquartered in San Mateo, United States.
Is Farsight Security public or private?▾
Farsight Security is a privately-held company.
How many employees does Farsight Security have?▾
Farsight Security has approximately 18 employees.
What does Farsight Security do?▾
Farsight Security is a cybersecurity intelligence company, now operating as a subsidiary of DomainTools following an acquisition. The company specializes in DNS (Domain Name System) observation data, providing visibility into DNS activity to support threat detection, investigation, enrichment, and m…