Nucleus Security Raises $20 Million Series C to Accelerate Exposure Management Platform Adoption

New updates have been reported about Nucleus Security.

Nucleus Security has secured $20 million in Series C funding led by Delta-v Capital, capital it plans to deploy to scale its unified vulnerability and exposure management platform as enterprise demand accelerates. Positioned as a system of record for assets, vulnerabilities, and exposures, Nucleus is focusing on automating remediation of the most critical risks to reduce breach likelihood and strengthen measurable cyber risk outcomes for large organizations.

The company is driving an industry shift from traditional point-in-time vulnerability scanning toward exposure management orchestration, integrating data from more than 200 security and asset tools, business context, and AI-driven exploit intelligence into a single operational view. Over the past year, Nucleus has displaced costly homegrown vulnerability management tools at multiple enterprises, which management frames as a key growth driver for 2026 and beyond.

CEO and co-founder Steve Carter said the new capital validates customer demand for platforms that deliver speed and clarity rather than additional raw data, emphasizing Nucleus’s role in helping security teams prioritize and remediate the highest-impact risks in cloud and AI-centric environments. Investors from Delta-v Capital and Arthur Ventures highlighted Nucleus’s practitioner-built architecture, lack of vendor lock-in, and ability to unify risk across IT, cloud, application, and operational technology environments as reasons they expect the company to help define the next phase of the exposure management market.

As vulnerability and exposure management increasingly becomes a board-level concern, the funding round strengthens Nucleus Security’s balance sheet and strategic position as it pursues larger enterprise and government deals, leveraging its FedRAMP authorization to deepen penetration with federal agencies and defense contractors. Executives and stakeholders should view this raise as both validation of Nucleus’s category-defining ambitions and an enabler for continued product investment, go-to-market expansion, and accelerated replacement of legacy and homegrown solutions in a consolidating cybersecurity tooling landscape.