Nucleus Security, a unified vulnerability and exposure management platform, announced it has raised a $20 million Series C funding round led by Delta-v Capital to meet what it described as surging enterprise demand for exposure management.
Nucleus said it has emerged as a system of record for assets, vulnerabilities, and exposures, and as an automation engine to help organizations remediate the issues that matter most to prevent breaches. The company framed its strategy as part of an industry shift away from traditional vulnerability scanning toward exposure management orchestration that operationalizes context and closes the gap between risk data and action.
Nucleus said its platform integrates security and asset data from more than 200 tools along with business context and AI-driven exploit intelligence to create a shared and continuously updated view of exposure that can drive prioritized remediation and measurable risk reduction across the organization.
The company said that over the past year it has benefited from a replacement cycle among enterprise customers as organizations move off expensive homegrown vulnerability management tools that can no longer meet operational requirements, and it positioned 2026 as a period of continued growth opportunity.
KEY QUOTES
“This investment reinforces what our customers already know: security teams need speed, clarity, and real outcomes, not more data. We’re helping organizations cut through the noise, prioritize the risks that matter most, and reduce exposure faster in today’s cloud and AI-driven environments.”
Steve Carter, Co Founder And Chief Executive Officer, Nucleus Security
“Built by practitioners, the platform has emerged as the orchestration platform organizations need to unify risk across the growing sources of exposure data across IT, cloud, application, and OT environments, without vendor lock-in. Vulnerability and exposure management is increasingly a board-level responsibility; we believe Nucleus is uniquely positioned to define the next phase of this market.”
Connor Heard, Principal, Delta-v Capital
“We invested in Nucleus because the team understood that exposure management is about driving action. Over time, they’ve proven they can execute, building a platform that scales with modern organizations, delivers real operational rigor, and consistently turns complex risk signals into measurable outcomes. Nucleus has evolved from a strong vision into a category-defining company.”
Ryan Kruizenga, General Partner, Arthur Ventures
