Know More Noise

GreyNoise tells security analysts what not to worry about.


We collect, analyze and label data on IPs that saturate security tools with noise. This unique perspective helps analysts confidently ignore irrelevant or harmless activity, creating more time to uncover and investigate true threats.

Increase Analyst Efficiency

GreyNoise helps analysts recognize events not worth their attention. Indicators in GreyNoise are likely associated with opportunistic internet scanning or common business services, not targeted threats. This context helps analysts focus on what matters most.

Uncover Compromised Devices

If we see your device scanning the internet, it's likely compromised. GreyNoise notifies analysts when an IP they care about shows up in our collection, helping security teams respond quickly to compromises.

See Emerging Threats

Security teams can uncover tradecraft seen across the internet through our GreyNoise Query Language (GNQL). Our tags reveal IPs looking for and exploiting vulnerabilities. Security teams can assess their exposure as they monitor progressive threat activity.

How It Works

Our insight is delivered through our API, integrations and visualizer from two distinct datasets:

Internet Background Noise

GreyNoise’s internet-wide sensor network passively collects packets from hundreds of thousands of IPs seen scanning the internet every day.

Companies like Shodan and Censys, as well as researchers and universities, scan in good faith to help uncover vulnerabilities for network defense. Others scan with potentially malicious intent. GreyNoise analyzes and enriches this data to identify behavior, methods and intent, giving analysts the context they need to take action.


RIOT (Rule It OuT) provides context to communications between your users and common business applications (e.g. Microsoft O365, Google Workspace and Slack), or services like CDNs and public DNS servers. These applications communicate through unpublished or dynamic IPs making it difficult for security teams to track. Without context, this harmless behavior distracts security teams from investigating true threats.


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