GreyNoise review
Deep IP threat context across lookups, history, vulnerabilities, protocols, and C2 activity.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
GreyNoise provides IP intelligence for security teams investigating internet-wide scanning, exploitation, and other network activity. Analysts can look up one or multiple IP addresses, review classifications and behavioral metadata, and enrich security alerts with network context. Its focus suits teams that need more than a basic IP lookup, especially when investigating suspicious activity and assessing whether an address is associated with VPNs, Tor, vulnerabilities, or command-and-control callbacks.
The depth of its intelligence is a key distinction. GreyNoise Query Language (GNQL) searches GreyNoise data in the Visualizer and REST API, while historical timelines help analysts examine activity over time. Additional context includes vulnerability and CVE intelligence with CVSS, EPSS, and KEV data, as well as protocol analysis and JA3, JA4, JA4H, and HASSH fingerprinting. C2 callback IP detection and attribution can add another investigative angle. This breadth is useful for threat investigation; teams seeking only occasional basic lookups may not need it.
A free Community API plan provides 50 searches per week, up to 10 days of historical lookback, 3 alerts, and 1 blocklist. Standard adds the Enterprise API and GNQL, unlimited searches and users, 10 alerts, and 3 blocklists. Advanced keeps unlimited searches and users and raises the allowances to 25 alerts and 10 blocklists; Elite offers unlimited alerts and blocklists. According to GreyNoise's published plans, paid pricing requires contacting sales. Web, API, and self-hosted options support different deployment needs, and support channels include email, chat, and documentation. Choose GreyNoise when deeper IP context and investigative coverage matter; a simpler lookup-focused tool may suit teams with narrower needs.
GreyNoise pros and cons
- Where it wins
- Historical timelines add context to current IP activity.
- CVE context includes CVSS, EPSS, and KEV intelligence.
- Protocol fingerprints and C2 attribution deepen investigations.
- Where it doesn't
- Free plan limits searches to 50 per week.
- Free historical lookback is limited to 10 days.
- Paid tiers require a sales contact for pricing.
GreyNoise fact sheet, pricing and score →
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