Horizon3
Runs autonomous AI-driven penetration testing to secure enterprise networks
$250MSeries E
Role not disclosedBC
Blue Cloud Ventures
Activity from announced rounds
Activity in this selectionUnited States · Oct 19, 2026 · Jul 22, 2026
Blue Cloud Ventures is a software growth investor whose official investment news identifies Exein and RapidFort.
Recorded funding activity
Exein protects connected devices from vulnerabilities and attacks at runtime. RapidFort remediates vulnerabilities in software supply chains, while Horizon3 provides autonomous penetration testing. The recorded activity therefore includes several different points at which enterprise and device software can be secured.
Sources
- Rounds participated in
- 1
- Confirmed lead rounds
- — 1 roles undisclosed
- New companies
- 1 First participation on record · 0 follow-on
- Funding in participating rounds
- $250M 1 disclosed · full round size, not this investor’s share