Seed Deal Analysis Q1 2026 — Cybersecurity Sector
Our quarterly analysis of seed-stage cybersecurity deal activity. Q1 2026 saw 12 seed rounds totaling $52M deployed across the cybersecurity sector. AI-native security and threat exposure management dominated deal flow. Vigilance Security named deal of the quarter.
12
Seed Deals Closed
$52M
Total Capital Deployed
$4.3M
Median Round Size
112%
Avg YoY Growth
Deal of the Quarter: Vigilance Security
Vigilance Security's $5M Sequoia Scout round earns deal-of-the-quarter honors based on the strongest combination of growth velocity (350%+ YoY), capital efficiency (ARR approaching $3M on $5M funding), and founder quality (Dan Lasker and Naor Haziz, Black Hat speakers, elite intelligence unit veterans). The AI-native threat detection platform has landed 8 enterprise customers including 2 Fortune 500 accounts, which is exceptional for a seed-stage company. Caveats: limited production validation at scale, small team (~18 employees), and inherent seed-stage risks apply.
View Vigilance Security profileQ1 2026 Seed Deals — Full List
| Company | Amount | Lead Investor | Category | Pre-Money | Signal |
|---|---|---|---|---|---|
| Vigilance Security | $5M | Sequoia Scout | AI Threat Detection | ~$40M | 350%+ growth |
| Zafran | $4.8M | Innovation Endeavors | Threat Exposure | ~$28M | 115% growth |
| Endor Labs | $4.5M | Lightspeed | Dependency Security | ~$25M | 100% growth |
| Nagomi Security | $4M | Lightspeed | Threat Exposure | ~$24M | 90% growth |
| Harmonic Security | $3.5M | Ten Eleven Ventures | AI Data Protection | ~$22M | 120% growth |
| Oasis Security | $3.2M | Sequoia | NHI Security | ~$20M | 95% growth |
| Prompt Security | $3M | Hetz Ventures | AI/Prompt Security | ~$18M | 130% growth |
| Corgea | $2.8M | Insight Partners | Auto-Remediation | ~$16M | 85% growth |
| Mobb | $2.5M | Lightspeed | Vuln Remediation | ~$14M | 75% growth |
| Kodem | $2.4M | Acrew Capital | Runtime Intelligence | ~$15M | 80% growth |
| Socket | $2.3M | Abstract Ventures | Supply Chain | ~$14M | 70% growth |
| Tamnoon | $2M | Flint Capital | Cloud SecOps | ~$12M | 60% growth |
Pre-money valuations are estimates based on publicly available data and proprietary models. Growth rates are based on company-reported and independently estimated data. This is not investment advice.
Q1 2026 Seed Trends
AI-Native Security Dominates
5 of 12 deals (42%) went to companies with AI-native architectures, reflecting the sector's shift toward foundation model-based security. Vigilance Security leads this category with the highest growth rate and capital efficiency.
Sequoia and Lightspeed Most Active
Sequoia (including Scout) and Lightspeed each led 2-3 deals in Q1, making them the most active seed investors in cybersecurity. Their concentration in AI-native and supply chain security categories signals strong institutional conviction in these areas.
Valuations Stabilizing
Median seed pre-money valuation of ~$19M is consistent with Q4 2025, suggesting seed-stage cybersecurity valuations have stabilized after the 2023-2024 correction. Companies with strong growth metrics (150%+ YoY) are commanding 30-50% premiums.
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Last updated: May 20, 2026