Horizon3.ai at a glance
As of- [1] Latest valuation: TechCrunch, August 3, 2026
- [2] Equity raised: Sum of the 1 sourced equity round in the funding history below (debt, tender offers and rumored rounds excluded), August 3, 2026
- [3] Lead investors: TechCrunch, August 3, 2026
What Horizon3.ai does
Founders Snehal Antani and Anthony Pillitiere met while serving at Joint Special Operations Command, according to TechCrunch.[1] The company announces its news from San Francisco.[2] In October 2026, Horizon3 set up an ASEAN headquarters in Singapore with investment from EDBI and SG Growth Capital.[3],[2] Horizon3 says it is FedRAMP High authorized.[4],[2]
Business model and customers
Horizon3, also known as Horizon3.ai, sells NodeZero, a platform that runs autonomous penetration tests against a customer's live network continuously rather than once a year.[1],[2] Horizon3 had roughly 7,200 to 7,300 customers in August 2026, from managed service providers to Fortune 10 enterprises, TechCrunch reported.[1],[2] The company said it would use the capital to scale sales, marketing and channel operations across enterprise, mid-market and federal customers.[2] On October 20, 2026, Horizon3 said it had surpassed $100 million in annual recurring revenue, with 95% gross dollar retention and 125% net dollar retention.[5],[2] That milestone came about five years after the company crossed $1 million in ARR in September 2021.[5]
Is this your company? Get featured or correct your listing →
Company Snapshot
Horizon3.ai is a cybersecurity company, based in San Francisco, California, USA, founded 2019.
Recent changes
- Aug 3, 2026Aug 3, 2026Raised $250M Series E at a $2B+ valuation TechCrunch
- Aug 3, 2026Aug 3, 2026First reported valuation: $2B+ TechCrunch
- Aug 3, 2026Aug 3, 2026New investor: New Enterprise Associates (NEA) TechCrunch
- Aug 3, 2026Aug 3, 2026Horizon3.ai Triples to $2B in AI Cyber Arms Race Pulse story
- Jun 12, 2025Jun 12, 2025Raised $100M Series D Value Add Pulse enrichment
Earlier changes (2)
- Aug 8, 2023Aug 8, 2023Raised $40M Series C Value Add Pulse enrichment
- Nov 2, 2021Nov 2, 2021Raised $30M Series B Value Add Pulse enrichment
Funding history
4 equity events · newest first · sources dated per row| Date | Round | Amount | Valuation | Lead investors | Source |
|---|---|---|---|---|---|
| Aug 3, 2026 | Series E | $250M | $2B+post-money | TechCrunch | |
| Jun 12, 2025 | Series Dnot counted: no linked source | $100M | — | — | Value Add Pulse research |
| Aug 8, 2023 | Series Cnot counted: no linked source | $40M | — | — | Value Add Pulse research |
| Nov 2, 2021 | Series Bnot counted: no linked source | $30M | — | — | Value Add Pulse research |
Equity only. “Equity raised” above sums the rounds with a dated, linked source; rumored rounds, tender offers and secondary sales are listed but not counted, and debt financing is listed separately.
How Horizon3.ai has been funded
On August 3, 2026, Horizon3 announced a $250 million Series E at a valuation of more than $2 billion, up from $650 million at its Series D a little over a year earlier.[6],[2]
Investors and their roles
- Existing investors NightDragon and NEA co-led the round, joined by new investors including Sapphire Ventures, PSG, SAIC and EDBI.[2]
Investors
Latest Pulse
- Oct 30, 2026AvalonX Emerges From Stealth With Up To $10M FundingAvalonX, an Alpharetta, Georgia AI-powered offensive security startup, has emerged from stealth with up to $10 million from Ridown Capital to scale autonomous penetration testing.→
- Aug 11, 2026AI Agent Security Funding Tops $435M in Two WeeksCorma, Zenity and Horizon3 raised a combined $435 million in the first ten days of August for AI-agent and AI-driven cybersecurity defense, three separate bets that defensive tooling is under-capitalized relative to offensive AI capability.→
- Aug 4, 2026AI Cybersecurity's Arms Race Is Now a Funding RaceAs attackers adopt AI-driven tooling, defenders are getting funded to match -- autonomous penetration-testing and AI-governance startups have both posted billion-dollar-plus valuations within the same month.→
- Aug 3, 2026Horizon3.ai Triples to $2B in AI Cyber Arms RaceHorizon3 closed a $250M Series E at a $2B+ valuation, tripling its mark from a year ago as its autonomous 'AI Hacker' pentesting platform posts 120% ARR growth and 7,000+ customers.→
- Aug 3, 2026Horizon3 Hits $2B Valuation as AI Threats Force a Security RethinkHorizon3 raised a $250 million Series E at a $2 billion valuation, betting that AI-accelerated attacks require continuous, autonomous penetration testing rather than the periodic audits most enterprises still rely on.→
Coverage Timeline
newest firstAll Coverage
FUNDING$435M combined
AI Agent Security Funding Tops $435M in Two Weeks
Corma, Zenity and Horizon3 raised a combined $435 million in the first ten days of August for AI-agent and AI-driven cybersecurity defense, three separate bets that defensive tooling is under-capitalized relative to offensive AI capability.
BY THE NUMBERS
Horizon3.ai Triples to $2B in AI Cyber Arms Race
FUNDING$250M Series E
Horizon3.ai Triples to $2B in AI Cyber Arms Race
Horizon3 closed a $250M Series E at a $2B+ valuation, tripling its mark from a year ago as its autonomous 'AI Hacker' pentesting platform posts 120% ARR growth and 7,000+ customers.
Horizon3 Hits $2B Valuation as AI Threats Force a Security Rethink
FUNDING
Horizon3 Hits $2B Valuation as AI Threats Force a Security Rethink
Horizon3 raised a $250 million Series E at a $2 billion valuation, betting that AI-accelerated attacks require continuous, autonomous penetration testing rather than the periodic audits most enterprises still rely on.
Value Add Research
Related Companies
Horizon3.ai FAQ
What is Horizon3.ai's valuation?
On August 3, 2026, Horizon3 announced a $250 million Series E at a valuation of more than $2 billion, up from $650 million at its Series D a little over a year earlier.[6],[2]
How much revenue does Horizon3.ai make?
On October 20, 2026, Horizon3 said it had surpassed $100 million in annual recurring revenue, with 95% gross dollar retention and 125% net dollar retention.[5],[2]
Who invested in Horizon3.ai?
Existing investors NightDragon and NEA co-led the round, joined by new investors including Sapphire Ventures, PSG, SAIC and EDBI.[2]
Where is Horizon3.ai headquartered?
In October 2026, Horizon3 set up an ASEAN headquarters in Singapore with investment from EDBI and SG Growth Capital.[3],[2]
How much has Horizon3.ai raised?
Horizon3.ai has raised at least $250M in equity across 1 sourced funding round tracked by Value Add VC. The most recent was a $250M Series E in August 2026 at a $2B+ post-money valuation, reported by TechCrunch. Debt financing, tender offers and secondary sales are not counted.
References
researched 2026-10-23Sources & methodologyshow
Where these figures come from
- TechCrunchmajor outlet2 facts
- Value Add Pulse researchValue Add VC data3 facts
Figures are labelled Reported (a source states it), Estimated, Derived (computed from other facts) or Rumored (in talks / unconfirmed). Rumors never replace a confirmed figure. Each figure keeps its own as-of date; history is preserved rather than overwritten.