# Nucleus Security

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/nucleus-security-2

- Industry: Software
- Headquarters: Sarasota, US
- Website: www.nucleussec.com
- Total disclosed funding: $87M
- Latest round: Series C (Feb 11, 2026)
- Investors on record: 3

## About

Founded in 2019 and based in Florida, US, Nucleus Security Inc. offers a risk-based vulnerability management (RBVM) platform designed to streamline and automate vulnerability management analysis, prioritization, and response through orchestration for enterprises. In February 2026, Nucleus Security Inc. raised USD 20 million in series C funding led by investor Delta-v Capital, with participation from investor Arthur Ventures. Steve Carter (CEO), Scott Kuffer, and Nick Fleming co-founded the firm.

Nucleus Security's flagship product, the Nucleus platform, offers a unified approach to vulnerability management by consolidating data from various scanning tools, penetration tests, and compliance audits into a centralized hub. Through advanced automation and intelligent prioritization algorithms, Nucleus enables organizations to accelerate their vulnerability response, significantly reducing the time and resources required for remediation. The platform's robust features include customized vulnerability prioritization, automated remediation workflows, and integrated threat intelligence from Mandiant, empowering organizations to make informed decisions. In addition, Nucleus offers a Risk-Based Vulnerability Management (RBVM) solution that streamlines and automates vulnerability management processes for organizations, facilitating the mitigation of vulnerabilities with enhanced efficiency. The company's platform provides comprehensive pipeline integration, tracking, automation, and reporting capabilities, along with a suite of tools designed to facilitate the rapid deployment of secure software. By consolidating and normalizing scan results from various vulnerability scanning tools, Nucleus enables organizations to gain a real-time view of active vulnerabilities across their application environment.

The company plans to use the February 2026 funding to support its growth and product development initiatives.

## Funding rounds

- Series C, Feb 11, 2026, $20M — Delta-v Capital, Arthur Ventures
- Series B, Feb 12, 2024, $43M — Lead Edge Capital, Arthur Ventures
- Series B, Mar 18, 2022, $20M — Lead Edge Capital, Arthur Ventures
- Series A, Feb 26, 2021, $3.5M — Arthur Ventures

## Investors

- Arthur Ventures (https://capitalatlas.ai/funds/arthur-ventures) — Series A, Series B, Series C
- Lead Edge Capital (https://capitalatlas.ai/funds/lead-edge-capital) — Series B
- Delta-v Capital (https://capitalatlas.ai/funds/delta-v-capital) — Series C