Funding record · 2026 / 01
Horizon3.ai raises an undisclosed amount in a venture round for security operations
Announced 13 January 2026 · Recorded 8 September 2026 · Last verified 8 September 2026
Horizon3.ai, a security operations company based in San Francisco, United States, raised an undisclosed amount in a Venture Round announced on 13 January 2026, led by Prosperity7 Ventures. Its disclosed equity funding is now $428.5M across 7 rounds.
- Amount
- Undisclosed
- Round
- Venture Round
- Announced
- 13 January 2026
- Lead investor
- Prosperity7 Ventures
- Sources on record
- 1businesswire.com
From the source
Horizon3.ai Secures Investment from Prosperity7 Ventures to Protect AI Datacenters and Critical Infrastructure
Horizon3.ai announced an investment from Prosperity7 Ventures (Aramco Ventures' diversified venturing fund) to support its offensive security platform and expansion into AI datacenter and critical infrastructure protection.
businesswire.com · 13 January 2026 ↗The Mandos read
What the record says about Horizon3.ai
- Momentum 77 / 100 · Acceleratinglocked →
pillars in the platform
- 446 employees · up 5% last month · 59 open roleslocked →
history and breakdowns in the platform
- Exit Readiness: Lowlocked →
Tested against 751 past exits in the Mandos record: 43% sat in Watch or Elevated 2 years before. Companies in Elevated exited at 3.1× the record's rate.
- Buyers most often compare Horizon3.ai with Novee Security, Armadin and XBOW and 5 morelocked →
the full set in the platform
Funding history
Horizon3.ai funding on record
Horizon3.ai has raised $428.5M in priced equity. Its most recent round was a Series E in August 2026.
Latest round on record: Series E, Aug 2026.
Horizon3.ai funding on the profile →Related rounds
Other verified cybersecurity rounds
Also in Jan 2026
Most recent five, same month
In the platform
The round is the fact. The read is the product.
Every round, investor and correction for Horizon3.ai, the competitors buyers weigh it against, hiring by department, and an alert when the next thing happens.
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FAQ
Questions people ask
- How much did Horizon3.ai raise in its Venture Round?
- Horizon3.ai raised an undisclosed amount in a Venture Round announced on 13 January 2026.
- Who invested in Horizon3.ai's Venture Round?
- The round was led by Prosperity7 Ventures.
- What does Horizon3.ai do?
- Horizon3.ai is a cybersecurity company specializing in Security Operations, founded in 2019 and headquartered in San Francisco, United States.
