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GreyNoise

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150 reviews
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Average star rating
4.8
Serving customers since
2017
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GreyNoise

150 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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NK
Nandani K.
03/10/2026
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review

Valuable platform for managing high volumes of security alerts

GreyNoise has been very helpful in understanding what kind of activity is happening against our internet facing systems. It allows us to quickly search IP addresses by risk level and identify the most suspicious traffic or unusual hosting providers. This gives us a clearer picture of what is actually being scanned in our network and helps us block unauthorized access more confidently. I also like how it adds context to firewall logs, web server events, and other alerts so we can quickly see whether an IP is part of normal internet scanning or something more serious. It helps us identify endpoints that may be missing important security patches and reduce potential vulnerabilities. The platform also makes it easier to create firewall rules because malicious IPs and hosts are clearly classified.
AY
Arun Y.
03/09/2026
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review

Makes threat investigation faster by adding context to suspicious IP activity

GreyNoise has been a very reliable tool and it was quite easy for us to set up and start using in our environment. The dashboard is very helpful because it clearly shows information about suspicious IP addresses, their risk scores, the country they come from, and which networks they are targeting. It also scans the network very quickly and updates the dashboard whenever new threats appear, which helps us stay aware of possible risks. I like that it is easy to search by risk level to identify the most malicious IPs and unusual traffic patterns. This helps us understand what kind of scanning or probing activity is happening against our internet facing systems. It also helps us find endpoints that may be missing security patches so we can fix them before they become a problem.
AS
Atul S.
03/08/2026
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review

Makes investigating suspicious IP traffic much easier

In my daily work I often check firewall logs, web server activity, and login attempts, and GreyNoise helps me quickly understand where unknown IP traffic is coming from. It makes it easier to tell whether the traffic is just normal internet scanning or something that could actually affect our systems. I like that it shows real behavior and patterns instead of just listing possible vulnerabilities that may not matter. The information it provides helps me decide when to adjust firewall rules, add rate limits, or ignore harmless activity. It also runs without installing any agent, which makes it simple to use and saves a lot of time for smaller teams.

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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