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Who is GreyNoise?
GreyNoise is a cybersecurity company that provides internet-wide visibility into background internet traffic to help organizations identify and filter out benign noise from active threats.
- Internet-wide sensor data on public IP activity
- Threat intelligence for distinguishing benign scanning from malicious activity
- Context for prioritizing and filtering alerts
- APIs and integrations for security operations workflows
- Products and services for security teams, SOCs, and threat hunting workflows
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More About GreyNoise
GreyNoise is positioned for enterprise security teams that need context around internet-facing activity, especially when large volumes of unsolicited traffic make it harder to separate routine background scanning from targeted attack behavior. Its offering is centered on visibility into what is observed across the public internet, with enrichment that can be used in security operations, threat hunting, and alert triage.
The company’s core solution area aligns with threat intelligence and internet intelligence. GreyNoise collects and analyzes data from sensors that observe public IP activity, then exposes that information through interfaces that can be used by analysts and automated systems. In enterprise environments, this type of data is typically applied in SOC workflows, SIEM enrichment, detection tuning, and investigation of IP addresses, domains, and associated activity patterns.
GreyNoise is commonly compared with threat intelligence and security analytics tools that provide external context for internet-borne activity, but its focus is narrower than broad security platforms because it concentrates on background noise, scanning behavior, and attack surface context rather than endpoint, network, or identity control. That positioning makes it relevant where teams need to reduce false positives and prioritize work based on observed internet behavior.
For directory and taxonomy use, GreyNoise fits under cybersecurity, threat intelligence, and security operations tooling, with adjacent placement in threat hunting, attack surface monitoring, and SIEM/SOAR enrichment categories. The business function is to supply context that helps security teams interpret inbound internet activity and automate decisions based on observed public IP telemetry.
Our description of GreyNoise. Updated August 2026.
