Horizon3 raises $250.0M Series E (United States, Aug 2026)
Reach the investors backing rounds like this
Backed by NightDragon, NEA · verified emails and LinkedIn on Datapile
Horizon3 hits $2 billion valuation with $250M Series E as AI threats escalate - TechCrunch
Horizon3 is a cybersecurity startup that specializes in AI-driven security testing to identify vulnerabilities in networks. The company serves enterprises looking to enhance their security measures against increasing AI-driven threats, and has recently raised $250 million in funding to expand its operations and R&D efforts.
Horizon3 hits $2 billion valuation with $250M Series E as AI threats escalate TechCrunch
| Oct 09, 2026 | CleanSpark | $2.28B | Debt | United States |
| Oct 09, 2026 | Proximal | $15.0M | Seed | United States |
| Oct 09, 2026 | Atlas Atomics | $400.0M | Series A | United States |
| Oct 09, 2026 | Oratomic | $475.0M | Series B | United States |
21,967 investors back startups in United States
You just read who funded Horizon3. The same database has the investors behind every other round — with verified emails, check sizes and the stages they actually write at.
Free account: 15 investor contact unlocks a month, no card required.