Nucleus Security
Nucleus Security is a cybersecurity company specializing in Threat & Vulnerability Management, founded in 2018 and headquartered in Sarasota, United States. It has raised $86.1M in equity across 5 priced rounds, employs about 123 people, and is privately held.
updated Sep 12, 2026
Latest Nucleus Security news and company activity
What Nucleus Security did, dated — selected moves from the record, one per kind, newest first.
- Aug 2026Product launchNucleus Security Announces Nucleus Helix, AI Engine for Exposure Management
- Aug 2026RecognitionNucleus Security Named Finalist for Two Cyber Defense Magazine Innovation Awards
- May 2026RecognitionNucleus Security Earns Two GOVIES Government Security Awards from Security Today
- Feb 2026Funding round
Nucleus Security Momentum score
53/ 100
Mandos Momentum blends hiring, funding, traffic and sentiment into one score out of 100. The score is free; the pillars behind it unlock in the platform.
Nucleus Security funding
Nucleus Security has raised $86.1M in priced equity. Its most recent round was a Series C in February 2026.
- Equity raised
- $86.1M5 priced rounds
- Last round
- Series CFeb 2026
Nucleus Security employees and hiring
Nucleus Security has about 123 employees, up 3% over the last 30 days, with 4 open roles.
- Employees
- 123
- 30-day change
- +3%
- Open roles
- 4
Nucleus Security competitors
Security professionals most often compare Nucleus Security against Airrived, ThreatDown by Malwarebytes, and Seconize on cybersectools.com. 1 more is in the platform, with overlap scoring.
by search demand for comparison pages on cybersectools.com, 90 days
The other 440 data points.
- Funding historyevery round, every investor named
- Headcount growthvelocity, departments, seniority
- Open jobs4 live postings, role mix
- Tech stackframeworks, clouds, security
