Latest Cybersecurity Startup Funding Rounds
Security companies raising capital to protect identities, applications, infrastructure and data.
- Rounds
- 90 Jul 18 – Oct 15, 2026
- Disclosed funding
- $4B 75 disclosed amounts
- Median round
- $21M Of disclosed amounts
| Company | Amount | Round | Sector | Country | Investors | Announced |
|---|---|---|---|---|---|---|
| O OpsinCompany profile Opsin helps enterprises discover AI agents, assess their permissions and contain risky behaviour. Opsin helps enterprises discover AI agents, assess their permissions and contain risky behaviour. | $21M | Funding roundUndisclosed | Cybersecurity | United States | Investors | |
| C Autonomous adversarial testing for enterprise security teams. | $4M | Pre-seed | Cybersecurity | United Kingdom | Investors | |
| HS Harmonic SecurityCompany profile Harmonic Security helps enterprise security teams understand employee AI use and prevent sensitive information from being shared. Harmonic Security helps enterprise security teams understand employee AI use and prevent sensitive information from being shared. | $50M | Series B | Cybersecurity | United States | Investors | |
| H HadrianCompany profile Hadrian helps enterprise security teams discover exposed systems and validate exploitable weaknesses. Hadrian helps enterprise security teams discover exposed systems and validate exploitable weaknesses. | $40M | Series B | Cybersecurity | Netherlands | Investors | |
| N NetsecCompany profile Netsec operates IT and cybersecurity for mid-market companies through a unified managed service delivered in Slack and Teams. Netsec operates IT and cybersecurity for mid-market companies through a unified managed service delivered in Slack and Teams. | >$10M | Undisclosed | Cybersecurity | France | Investors | |
| FA Fleuret AI builds autonomous agents for penetration testing. | €4M | Pre-seed | Cybersecurity | France | Investors | |
| A ArmadinCompany profile Armadin develops AI agents that test attack paths across enterprise systems and show defenders how connected weaknesses could be exploited. Armadin develops AI agents that test attack paths across enterprise systems and show defenders how connected weaknesses could be exploited. | $255.5M | Series B | Cybersecurity | United States | Investors | |
| O OsavulCompany profile Osavul uses AI to detect and investigate hybrid threats across information, cyber and physical domains for governments and critical organizations. Osavul uses AI to detect and investigate hybrid threats across information, cyber and physical domains for governments and critical organizations. | €8.5M | Series A | Cybersecurity | — | Investors | |
| SS Sovera SecurityCompany profile AI-native managed detection and response software that helps organizations coordinate security operations across their existing tools. AI-native managed detection and response software that helps organizations coordinate security operations across their existing tools. | DKK 4M | EIFO match loanUndisclosed | Cybersecurity | Denmark | Investors | |
| R RemoteThreatCompany profile RemoteThreat provides an offensive cyber-operations platform for enterprise red teams, government mission teams and vetted defence partners. RemoteThreat provides an offensive cyber-operations platform for enterprise red teams, government mission teams and vetted defence partners. | $7M | Pre-seed | Cybersecurity | United States | Investors |
Active investors in this selection
All investors →Ranked by rounds participated in · From Jul 18, 2026
- 1Osney Capital
CodeWall, SCI Semiconductor, Ossprey
3rounds1led - 2Sequoia Capital
Cymphony, AIR, CORMA
3rounds3led - 3Bessemer Venture Partners
Upwind Security, Onyx Security, Act Security
3rounds1led - 4Insight Partners
DataBahn, Inforcer, Spur Intelligence
3rounds—led - 5SYN Ventures
Opsin, Balance Theory
2rounds1led
Latest digests
Archive →Explore published rounds while the next edition is being prepared.