Nucleus Security, a cybersecurity company specialising in unified vulnerability and exposure management, has secured fresh backing of $20m.
The company positions itself as a system of record for assets, vulnerabilities and exposures, helping organisations move from raw security data to concrete action.
The firm has raised $20m in a Series C funding round led by Delta-v Capital. Additional participation came from Arthur Ventures, whose existing relationship with the company underlines continued investor confidence in its strategy and execution.
Nucleus is seeking to reshape how businesses approach vulnerability management. Rather than relying solely on traditional scanning tools, the platform integrates data from more than 200 security and asset tools, layering in business context and AI-driven exploit intelligence. The result is a unified and continuously updated view of exposure across IT, cloud, application and operational technology environments. By orchestrating this data into prioritised actions, the company aims to help enterprises focus on the risks that matter most and reduce their attack surface in measurable ways.
The newly secured capital will be used to meet growing enterprise demand and support further platform development. As organisations contend with increasingly complex digital estates and mounting cyber threats, Nucleus plans to enhance its automation capabilities and scale its operations to support a broader customer base in 2026 and beyond.
Over the past year, the company says it has benefited from a significant replacement cycle among enterprise customers. Many organisations are moving away from costly, in-house vulnerability management systems that struggle to keep pace with modern cloud and AI-driven environments. Nucleus argues that its scalable system of record offers a more adaptable and future-proof alternative, creating what it describes as a compelling growth opportunity in the years ahead.
Nucleus Security co-founder and CEO Steve Carter said, “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.”
Delta-v Capital principal Connor Heard said, “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.”
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