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GreyNoise

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129 reviews
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Average star rating
4.8
Serving customers since
2017
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GreyNoise

129 reviews

GreyNoise is a cybersecurity platform that collects, analyzes, and classifies internet-wide scan and attack traffic to help security teams distinguish between benign and malicious activities. By leveraging a global network of passive sensors, GreyNoise identifies IP addresses involved in mass scanning and categorizes them based on intent, enabling organizations to reduce false positives and focus on genuine threats. This approach enhances the efficiency of Security Operations Centers (SOCs by filtering out irrelevant alerts and providing actionable intelligence on emerging threats. Key Features and Functionality: - Real-Time Threat Intelligence: Provides up-to-date information on internet scanning activities, allowing security teams to respond swiftly to potential threats. - IP Classification: Categorizes IP addresses as benign, suspicious, or malicious based on their behavior, aiding in accurate threat assessment. - Vulnerability Prioritization: Offers insights into active in-the-wild exploitation of vulnerabilities, assisting teams in prioritizing patching and remediation efforts. - Integrations: Seamlessly integrates with existing security tools and platforms, enhancing the overall security infrastructure. - Advanced Analytics: Utilizes data science techniques and AI to process vast amounts of data, providing meaningful insights and reducing alert fatigue. Primary Value and Problem Solved: GreyNoise addresses the challenge of alert fatigue faced by security teams due to the overwhelming volume of false positives generated by security tools. By filtering out internet background noise and focusing on relevant threats, GreyNoise enables organizations to: - Enhance Efficiency: Reduce the time spent investigating non-threatening alerts, allowing teams to concentrate on critical issues. - Improve Threat Detection: Identify and respond to emerging threats more effectively with real-time, actionable intelligence. - Optimize Resource Allocation: Prioritize vulnerability remediation efforts based on active exploitation data, ensuring resources are directed where they are needed most. By providing a clear distinction between benign and malicious internet activities, GreyNoise empowers security teams to act with speed and confidence, ultimately strengthening an organization's cybersecurity posture.

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GreyNoise Reviews

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HL
Harrison L.
02/02/2026
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review

GreyNoise Delivers Deep Traffic Protocol Visibility and Threat Detection to Support Secure Patching

The tool provides a deep dive into our network traffic, revealing patterns, URL traffic spikes and pinpointing potential CVEs. The centralized view of all vulnerabilities helps us make the right choices regarding network tuning and patching. It is able to monitor the activity of every IP address in real time and any anomalies associated with their behavior change making it easier to block malicious traffic.
ZB
Zaheer B.
02/02/2026
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review

Robust IP and Web Host scanning to ensure we apply reliable firewall policies across the environment

It is truly a great vulnerability management platform that allows us to scan IP addresses and web hosting services to get full visibility into all the traffic flowing within our network enabling us to have complete control over sites our users can access which is a very good way to decrease attack surface. It does a great job of classifying malicious IPs and web hosts so creating firewall policies for our environment is extremely straightforward. GreyNoise has been a fantastic vendor and partner to our overall cyber security program.
EK
Endelea K.
01/29/2026
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review

Super Unique Tool To Help In The Early Detection Of The Potential Security Violations.

What I find most beneficial is the feature where GreyNoise is capable of discovering and monitoring all the network equipment in real-time. I like it that with GreyNoise, the network traffic is definitely explained deeply. Monitoring IP addresses has since been an easy process.

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HQ Location:
Washington, D.C.

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@GreyNoiseIO

What is GreyNoise?

GreyNoise empowers the security teams of enterprises and global governments to act with speed and confidence by providing real-time, verifiable perimeter-based threat intelligence. This allows security teams to reduce noise in security operations, perform in-depth threat hunting campaigns, and focus on the most critical threats to their network. Our patented sensor technology enables us to collect and analyze unique threat data at-scale that no one else can. We provide the most actionable threat intelligence against mass internet scanning and exploitation, so that no attack works twice. For more information, please visit www.greynoise.io.

Details

Year Founded
2017