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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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Verified User in Biotechnology
UB
Verified User in Biotechnology
06/04/2026
Validated Reviewer
Review source: Seller invite
Incentivized Review

GreyNoise: Simple, Uncluttered Security That Keeps Our Traffic Secure

As a startup handling sensitive information, security is a must. GreyNoise helps us keep our traffic secure. It integrates with our CRMs and has a very simple interface. The dashboard includes the features we need without making things feel cluttered or overwhelming.
RN
Rahul N.
05/16/2026
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review

Strong IP intelligence with easy integrations into existing tools

GreyNoise gives us a clear way to make sense of noisy or confusing network traffic without having to jump between multiple security tools. It helps quickly identify suspicious IPs, shows where they originate from, and what type of scanning or attack behavior they are involved in. The dashboard is easy to use and updates in near real time, which makes it simpler to figure out what needs immediate attention and what can be safely ignored. It also makes it easier to spot unusual activity and potential gaps like missing patches. Since it doesn’t require any agent installation, the setup was straightforward and saved a lot of manual effort for the team.
RS
Ruth S.
05/15/2026
Validated Reviewer
Review source: Seller invite
Incentivized Review

GreyNoise RIOT Classification Cuts Alert Noise and Speeds SIEM Triage

We process high volume of inbound connection attempts and in payments infrastructure we get hit by opportunistic scanners constantly. Before GreyNoise every unfamiliar IP was getting escalated and analysts spent hours tracking crawlers. RIOT and noise classification let us filter those out of the alert queue immediately. Quick Check api integration into our SIEM took maybe one day to set up. The context it provides is also useful for not just that an IP is noisy but what it is scanning for.

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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.

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Year Founded
2017