Horizon3.ai
HO
Horizon3.ai builds NodeZero, an autonomous security testing platform that runs attack simulations against enterprise networks. It helps teams identify exploitable paths across on-premises and cloud environments, prioritize fixes, and retest to confirm remediation. NodeZero is designed to support frequent testing without manual scripting.
Founded by Snehal Antani (Co-founder & CEO), Anthony Pillitiere (Co-founder)
Blended valuation$2B
Valuation history
Weekly blended valuation with priced funding rounds marked on the timeline.
$2.2B
blended valuationfunding round
May 31, 2021$0Oct 5, 2026
All rounds
7 funding rounds, newest first.
| Round | Announced | Raised | Post-money |
|---|---|---|---|
| Series E | Aug 3, 2026 | $250M | $2B |
| Round | Jan 13, 2026 | — | $1.1B |
| Series D | May 22, 2025 | $100M | $784.2M |
| Series C | Aug 8, 2023 | $40M | $310.3M |
| Series B | Oct 29, 2021 | $30M | $162.2M |
Join Legion to view all 7 rounds.Sign in to Legion
Investors
18 investors across all rounds.
- SISignalFire
- CVCraft Ventures
- NENew Enterprise Associates
- PVProsperity7 Ventures
- QVQualcomm Ventures
- RVRidge Ventures
- 9C9Yards Capital
- ACAcrew Capital
- BCBlue Cloud Ventures
- EDEDBI
Only Legion members can view the full investor roster. Sign in to Legion
Secondary market activity
Recent buy and sell interest for Horizon3.ai shares on the secondary market.
| Kind | Implied valuation | Price / share | Date |
|---|---|---|---|
| $619.2M | $3.95 | Jun 23, 2026 | |
| $639.3M | $4.07 | Jun 5, 2026 | |
| $659.3M | $4.20 | May 29, 2026 |
Invest in the private markets on Legion
Registered users see full trading activity, every investor, rankings, and live deals.
Data as of Oct 16, 2026. Valuations are estimates blended from primary and secondary-market signals — not investment advice.