What is Nucleus?
Nucleus Security operates as a critical enterprise leader in the unified vulnerability and exposure management sector. The platform is engineered to enable organizations to prioritize and mitigate security risks with unprecedented speed and scale. By automatically unifying data from a wide array of security and business tools, Nucleus provides a single pane of glass that simplifies complex security operations. Its status as a FedRAMP authorized vendor further cements its position as a trusted partner for federal agencies, defense contractors, and large-scale enterprises seeking to secure their digital assets against sophisticated cyber threats.
How much funding has Nucleus raised?
Nucleus has raised a total of $86.1M across 3 funding rounds:
Series A
$3.1M
Series B
$63M
Series C
$20M
Series A (2021): $3.1M with participation from Arthur Ventures
Series B (2024): $63M led by Lead Edge Capital Management and Arthur Ventures
Series C (2026): $20M supported by Delta-v Capital
Key Investors in Nucleus
Arthur Ventures
Arthur Ventures is an early growth capital firm that specializes in leading investments in B2B software companies across the U.S. and Canada, focusing on maximizing value in the software sector.
Lead Edge Capital Management
Lead Edge Capital is a growth equity investment firm headquartered in New York City that focuses on investing in private and public software, internet, and tech-enabled services businesses on a global scale.
Delta-v Capital
Delta-v Capital provides flexible growth capital solutions to innovative technology companies, focusing on infrastructure software, cloud services, and vertical software with a team of former operators and engineers.
What's next for Nucleus?
With the successful closure of this major strategic investment, Nucleus is well-positioned to accelerate its product roadmap and expand its footprint within the federal and enterprise sectors. The focus will likely shift toward enhancing its dynamic automation capabilities, allowing security teams to further streamline their vulnerability management programs. As the company scales, it will continue to leverage its unique position as a FedRAMP-authorized entity to capture additional market share in highly regulated industries, ensuring that its clients remain resilient in an evolving threat environment.
See full Nucleus company page
