We Are Nucleus
We transform vulnerability and exposure management programs to help enterprises and government agencies prioritize and mitigate risks faster, at scale.
By Practitioners, For Practitioners
Founded by former Department of Defense security experts, Nucleus set out to address the inefficiencies and risks of manual vulnerability management. Today, organizations like Motorola, Paychex, and Marathon rely on Nucleus to unify their vulnerability data and automate workflows to prioritize vulnerabilities, mitigate risks, and prevent breaches.
Founded
Top of the INC 5000 List
Private and public sector clients
Integrations
TRUSTED BY ORGANIZATIONS WORLDWIDE
Our Investors
RECOGNITION
Celebrating Excellence
From our award-winning platform to being recognized as a top workplace and one of the fastest-growing companies, we are proud to lead in innovation, teamwork, and impact. These achievements reflect the dedication of our team and our commitment to our customers and partners.
Join Our Team
Interested in driving cybersecurity innovation? In joining a winning culture? Check out our open positions.
DON’T TAKE OUR WORD FOR IT
Read What Our Customers Are Saying
Gartner Peer Insights
Senior Security Analyst, Energy and Utilities
Gartner Peer Insights
Security Architect, IT Services
Our vulnerability management was quite a mess. The Nucleus Platform allowed us to replace [our] old tool with a modern platform, allowing us to easily streamline the vulnerability management process. It also allowed us to be scanner agnostic and automate data ingestion.
Gartner Peer Insights
Security Operations Manager, Education
Very valuable product that allows us to prioritize mitigation of vulnerability and risk. Very customizable and flexible.
Gartner Peer Insights
Manager, Sec Arch and Threat Management, Healthcare and Biotech
Nucleus Security has been an exceptional partner from the beginning…After purchasing, they offered one of the best onboarding/implementations I’ve worked with, and the product is easy to use.
Gartner Peer Insights
SOC Operations Manager, IT Services
Gartner Peer Insights
Service Delivery Manager, IT Services
An overall excellent experience, from sales, marketing to support.
Gartner Peer Insights
IT Associate, IT Services
Julian J.
Vulnerability Analyst II
The Nucleus Automation Engine makes VM workflows seamless. You can “set and forget” your automation rules, and as new data comes in, they are triggered with no manual intervention required.
Gartner Peer Insights
SVP & CISO, IT Services
Nucleus is a great platform for consolidating vulnerabilities and creating a representation of your risk posture. The platform is driving a change in our ability to become proactive in the delivery of our products and services.
Gartner Peer Insights
Sr. Developer
Nucleus Security is an outstanding vulnerability management orchestration platform that fits well in modern, complex environments where security data comes from multiple tools and teams.
Matt N.
Senior Security Architect
There is a huge need to aggregate vulnerabilities from your entire organization, not just infrastructure. Nucleus gives you that ability and helps make sense of it all. Without it, you might just be spending a lot of time and effort patching the wrong vulnerabilities.
Kate B.
Vulnerability Management Engineer
The ability I have to allow different patching teams access to the information that will make the greatest impact with the work that they are doing has been a great experience. The customization in the UI…is something I have not had experience with in other Vulnerability Management tools.
Gartner Peer Insights
Senior Security Analyst, Energy and Utilities
Gartner Peer Insights
Security Architect, IT Services
Our vulnerability management was quite a mess. The Nucleus Platform allowed us to replace [our] old tool with a modern platform, allowing us to easily streamline the vulnerability management process. It also allowed us to be scanner agnostic and automate data ingestion.
Gartner Peer Insights
Security Operations Manager, Education
Very valuable product that allows us to prioritize mitigation of vulnerability and risk. Very customizable and flexible.
Gartner Peer Insights
Manager, Sec Arch and Threat Management, Healthcare and Biotech
Nucleus Security has been an exceptional partner from the beginning…After purchasing, they offered one of the best onboarding/implementations I’ve worked with, and the product is easy to use.
Gartner Peer Insights
SOC Operations Manager, IT Services
Gartner Peer Insights
Service Delivery Manager, IT Services
An overall excellent experience, from sales, marketing to support.
Gartner Peer Insights
IT Associate, IT Services
Julian J.
Vulnerability Analyst II
The Nucleus Automation Engine makes VM workflows seamless. You can “set and forget” your automation rules, and as new data comes in, they are triggered with no manual intervention required.
Gartner Peer Insights
SVP & CISO, IT Services
Nucleus is a great platform for consolidating vulnerabilities and creating a representation of your risk posture. The platform is driving a change in our ability to become proactive in the delivery of our products and services.
Gartner Peer Insights
Sr. Developer
Nucleus Security is an outstanding vulnerability management orchestration platform that fits well in modern, complex environments where security data comes from multiple tools and teams.
Matt N.
Senior Security Architect
There is a huge need to aggregate vulnerabilities from your entire organization, not just infrastructure. Nucleus gives you that ability and helps make sense of it all. Without it, you might just be spending a lot of time and effort patching the wrong vulnerabilities.
Kate B.
Vulnerability Management Engineer
The ability I have to allow different patching teams access to the information that will make the greatest impact with the work that they are doing has been a great experience. The customization in the UI…is something I have not had experience with in other Vulnerability Management tools.
Frequently Asked Questions About Nucleus Security
What does Nucleus Security do?
Nucleus Security is a Unified Exposure Management platform that helps enterprises and government agencies reduce cyber risk at scale. The platform continuously unifies security data from 200+ sources, prioritizes vulnerabilities using AI-powered threat intelligence, and automates remediation workflows so security teams can close the gap between finding exposures and fixing them.
Who founded Nucleus Security?
Nucleus was founded in 2019 by former Department of Defense security experts who experienced firsthand how vulnerability and exposure management break down in large, complex environments. That practitioner background shapes how the platform is built: focused on execution, not just data aggregation. Today, 500+ enterprise and public sector organizations rely on Nucleus to drive measurable exposure reduction.
Who is Nucleus Security’s current CEO?
The CEO of Nucleus Security is co-founder Steve Carter, who has led the company since the company launched in 2019.
What kinds of organizations use Nucleus Security?
Nucleus is built for large enterprises, federal agencies, state and local government, and government contractors where scale and compliance requirements make exposure management especially difficult. Customers include Fortune 500 companies, defense and civilian agencies, and MSSPs. Organizations like Motorola, Paychex, and Autodesk use Nucleus to manage exposure across complex, distributed environments.
How is Nucleus Security different from other vulnerability management tools?
Nucleus is the largest pure-play vendor focused exclusively on vulnerability and exposure management, which means deeper domain expertise and a platform purpose-built for program execution. Unlike flexible-but-complex platforms that put DIY responsibility on the buyer, or point solutions that address single features without a full execution layer, Nucleus orchestrates the entire lifecycle from data to action without requiring custom engineering to maintain it.
Is Nucleus Security FedRAMP authorized?
Yes. Nucleus Security is FedRAMP authorized, making it one of the few exposure management platforms built to meet the security and compliance requirements of federal agencies and regulated environments. Nucleus also supports multi-tenant architecture for complex organizational structures and integrates POA&M processing directly into the platform.
What results do Nucleus Security customers see?
Nucleus customers see an average 60% reduction in mean time to remediate (MTTR) within six months of implementation. They can scale their programs effectively; for example, one Fortune 500 customer manages 1.9 billion active vulnerabilities on the platform. Customers can also accelerate action for critical exposures, with newly exploited vulnerabilities routed to ticket owners in under 15 minutes.
See Nucleus in Action
Discover how unified, risk-based automation can transform your vulnerability management.
