Horizon3.ai valuation, funding and investors
Horizon3.ai works in autonomous penetration testing services, based in Dover, United States. Founded in 2019, it has about 645 employees.
- Last round
- Series E · $250M · Aug 2026
- Valuation at last round
- $2.00B
- Headcount
- 645 · growing
- Grade
- A
- Founded
- 2019
Horizon3.ai valuation today
VCMC values Horizon3.ai at $2.1B today, with a range of $1.7B to $3.2B and a grade of A. The valuation starts from its last funding round, a Series E round in Aug 2026.
Valuation by date (101 rows)
Each point is what the model would have shown on that date, using only what was known then; before its first round, a company is valued as a startup because it later raised.
| Date | Valuation | Range | Predicted in 1 yr | Phase | Headcount | Trend | Grade | Winding-down probability |
|---|---|---|---|---|---|---|---|---|
| 1 Jan 2019 | $12.2M | $4.44M – $33.5M | $15.1M (+24%) | before first round | – | unknown | D | 0% |
| 1 Feb 2019 | $12.5M | $4.56M – $34.4M | $15.2M (+21%) | before first round | – | unknown | D | 0% |
| 1 Mar 2019 | $12.8M | $4.67M – $35.3M | $15.3M (+19%) | before first round | – | unknown | D | 0% |
| 1 Apr 2019 | $13.2M | $4.80M – $36.2M | $15.5M (+17%) | before first round | – | unknown | D | 0% |
| 1 May 2019 | $13.5M | $4.93M – $37.2M | $15.6M (+15%) | before first round | – | unknown | D | 0% |
| 1 Jun 2019 | $13.9M | $5.06M – $38.2M | $15.8M (+13%) | before first round | – | unknown | D | 0% |
| 1 Jul 2019 | $14.3M | $5.19M – $39.2M | $15.9M (+11%) | before first round | – | unknown | D | 0% |
| 1 Aug 2019 | $14.4M | $5.25M – $39.6M | $16.0M (+11%) | before first round | – | unknown | D | 0% |
| 1 Sep 2019 | $14.5M | $5.29M – $39.9M | $16.2M (+11%) | before first round | – | unknown | D | 0% |
| 1 Oct 2019 | $14.7M | $5.34M – $40.3M | $16.3M (+11%) | before first round | – | unknown | D | 0% |
| 1 Nov 2019 | $14.8M | $5.39M – $40.7M | $16.5M (+11%) | before first round | – | unknown | D | 0% |
| 1 Dec 2019 | $14.9M | $5.44M – $41.0M | $16.6M (+11%) | before first round | – | unknown | D | 0% |
| 1 Jan 2020 | $15.1M | $5.49M – $41.4M | $16.8M (+11%) | before first round | – | unknown | D | 0% |
| 24 Jan 2020 | $23.4M | $15.3M – $71.0M | $46.7M (+100%) | after a round | – | unknown | C | 0% |
| 1 Feb 2020 | $23.7M | $15.3M – $71.0M | $46.7M (+97%) | after a round | – | unknown | C | 0% |
| 1 Mar 2020 | $25.1M | $15.3M – $71.0M | $46.7M (+86%) | after a round | – | unknown | C | 0% |
| 1 Apr 2020 | $26.6M | $15.3M – $71.0M | $46.7M (+75%) | after a round | – | unknown | C | 0% |
| 1 May 2020 | $28.2M | $15.3M – $71.0M | $46.7M (+66%) | after a round | – | unknown | C | 0% |
| 1 Jun 2020 | $29.9M | $15.3M – $71.0M | $46.7M (+56%) | after a round | – | unknown | C | 0% |
| 1 Jul 2020 | $31.6M | $15.3M – $71.0M | $46.7M (+48%) | after a round | – | unknown | C | 0% |
| 1 Aug 2020 | $33.5M | $15.3M – $71.0M | $46.7M (+39%) | after a round | – | unknown | C | 0% |
| 1 Sep 2020 | $35.6M | $15.3M – $71.0M | $46.7M (+31%) | after a round | – | unknown | C | 0% |
| 1 Oct 2020 | $37.6M | $15.3M – $71.0M | $46.7M (+24%) | after a round | – | unknown | C | 0% |
| 1 Nov 2020 | $39.9M | $15.3M – $71.0M | $46.7M (+17%) | after a round | – | unknown | C | 0% |
| 1 Dec 2020 | $42.3M | $15.3M – $71.0M | $46.7M (+10%) | after a round | – | unknown | C | 0% |
| 1 Jan 2021 | $44.8M | $15.3M – $71.0M | $46.7M (+4%) | after a round | 15 | unknown | C | 0% |
| 1 Feb 2021 | $50.0M | $43.5M – $104M | $90.0M (+80%) | after a round | 15 | unknown | B | 0% |
| 2 Feb 2021 | $50.1M | $43.5M – $104M | $90.0M (+80%) | after a round | 15 | unknown | B | 0% |
| 1 Mar 2021 | $52.3M | $43.5M – $104M | $90.0M (+72%) | after a round | 15 | unknown | B | 0% |
| 1 Apr 2021 | $55.0M | $43.5M – $104M | $90.0M (+64%) | after a round | 15 | flat | B | 0% |
| 1 May 2021 | $57.7M | $43.5M – $104M | $90.0M (+56%) | after a round | 15 | flat | B | 0% |
| 1 Jun 2021 | $60.7M | $43.5M – $104M | $90.0M (+48%) | after a round | 15 | flat | B | 0% |
| 1 Jul 2021 | $63.7M | $43.5M – $104M | $90.0M (+41%) | after a round | 15 | flat | B | 0% |
| 1 Aug 2021 | $66.9M | $43.5M – $104M | $90.0M (+35%) | after a round | 15 | flat | B | 0% |
| 1 Sep 2021 | $70.3M | $43.5M – $104M | $90.0M (+28%) | after a round | 15 | flat | B | 0% |
| 1 Oct 2021 | $73.8M | $43.5M – $104M | $90.0M (+22%) | after a round | 15 | flat | B | 0% |
| 1 Nov 2021 | $77.6M | $43.5M – $104M | $90.0M (+16%) | after a round | 15 | flat | B | 0% |
| 3 Nov 2021 | $155M | $109M – $329M | $232M (+50%) | after a round | 15 | flat | B | 0% |
| 1 Dec 2021 | $160M | $109M – $329M | $232M (+45%) | after a round | 15 | flat | B | 0% |
| 1 Jan 2022 | $165M | $109M – $329M | $232M (+40%) | after a round | 15 | flat | B | 0% |
| 1 Feb 2022 | $171M | $109M – $329M | $232M (+36%) | after a round | 15 | flat | B | 0% |
| 1 Mar 2022 | $177M | $109M – $329M | $232M (+31%) | after a round | 15 | flat | B | 0% |
| 1 Apr 2022 | $183M | $109M – $329M | $232M (+27%) | after a round | 15 | flat | B | 0% |
| 1 May 2022 | $189M | $109M – $329M | $232M (+23%) | after a round | 15 | flat | B | 0% |
| 1 Jun 2022 | $196M | $109M – $329M | $232M (+19%) | after a round | 15 | flat | B | 0% |
| 1 Jul 2022 | $202M | $109M – $329M | $232M (+15%) | after a round | 15 | flat | B | 0% |
| 1 Aug 2022 | $209M | $109M – $329M | $232M (+11%) | after a round | 15 | unknown | B | 0% |
| 1 Sep 2022 | $217M | $109M – $329M | $232M (+7%) | after a round | 15 | unknown | B | 0% |
| 1 Oct 2022 | $224M | $109M – $329M | $232M (+4%) | after a round | 15 | unknown | B | 0% |
| 1 Nov 2022 | $232M | $109M – $329M | $232M (0%) | after a round | 110 | unknown | B | 0% |
| 1 Dec 2022 | $232M | $105M – $329M | $232M (0%) | after a round | 110 | unknown | B | 0% |
| 1 Jan 2023 | $232M | $100M – $329M | $232M (0%) | after a round | 110 | unknown | B | 0% |
| 1 Feb 2023 | $232M | $95.8M – $329M | $232M (0%) | after a round | 110 | unknown | C | 0% |
| 1 Mar 2023 | $232M | $92.1M – $329M | $232M (0%) | after a round | 110 | unknown | C | 0% |
| 1 Apr 2023 | $232M | $88.1M – $329M | $232M (0%) | after a round | 110 | unknown | C | 0% |
| 1 May 2023 | $232M | $84.4M – $329M | $232M (0%) | after a round | 110 | unknown | C | 0% |
| 1 Jun 2023 | $232M | $80.8M – $329M | $232M (0%) | after a round | 110 | unknown | C | 0% |
| 1 Jul 2023 | $232M | $77.4M – $329M | $232M (0%) | after a round | 110 | unknown | C | 0% |
| 1 Aug 2023 | $232M | $74.0M – $329M | $232M (0%) | after a round | 110 | unknown | C | 0% |
| 9 Aug 2023 | $332M | $234M – $612M | $431M (+30%) | after a round | 110 | unknown | B | 0% |
| 1 Sep 2023 | $337M | $234M – $612M | $431M (+28%) | after a round | 110 | unknown | B | 0% |
| 1 Oct 2023 | $345M | $234M – $612M | $431M (+25%) | after a round | 110 | flat | B | 0% |
| 1 Nov 2023 | $352M | $234M – $612M | $431M (+22%) | after a round | 110 | flat | B | 0% |
| 1 Dec 2023 | $360M | $234M – $612M | $431M (+20%) | after a round | 110 | flat | B | 0% |
| 1 Jan 2024 | $368M | $234M – $612M | $431M (+17%) | after a round | 110 | flat | B | 0% |
| 1 Feb 2024 | $376M | $234M – $612M | $431M (+14%) | after a round | 110 | flat | B | 0% |
| 1 Mar 2024 | $389M | $238M – $623M | $439M (+13%) | after a round | 120 | flat | B | 0% |
| 1 Apr 2024 | $398M | $238M – $623M | $439M (+10%) | after a round | 120 | flat | B | 0% |
| 1 May 2024 | $407M | $238M – $623M | $439M (+8%) | after a round | 120 | flat | B | 0% |
| 1 Jun 2024 | $417M | $238M – $623M | $439M (+5%) | after a round | 120 | flat | B | 0% |
| 1 Jul 2024 | $446M | $250M – $655M | $461M (+3%) | after a round | 150 | growing | B | 0% |
| 1 Aug 2024 | $459M | $250M – $655M | $461M (+1%) | after a round | 150 | growing | B | 0% |
| 1 Sep 2024 | $461M | $251M – $655M | $461M (0%) | after a round | 150 | growing | B | 0% |
| 1 Oct 2024 | $461M | $253M – $655M | $461M (0%) | after a round | 150 | growing | B | 0% |
| 1 Nov 2024 | $474M | $261M – $673M | $474M (0%) | after a round | 170 | growing | B | 0% |
| 1 Dec 2024 | $474M | $263M – $673M | $474M (0%) | after a round | 170 | growing | B | 0% |
| 1 Jan 2025 | $474M | $264M – $673M | $474M (0%) | after a round | 170 | growing | B | 0% |
| 1 Feb 2025 | $474M | $266M – $673M | $474M (0%) | after a round | 170 | growing | B | 0% |
| 1 Mar 2025 | $474M | $267M – $673M | $474M (0%) | after a round | 170 | growing | B | 0% |
| 1 Apr 2025 | $474M | $268M – $673M | $474M (0%) | after a round | 170 | growing | B | 0% |
| 1 May 2025 | $474M | $270M – $673M | $474M (0%) | after a round | 170 | growing | B | 0% |
| 1 Jun 2025 | $474M | $271M – $673M | $474M (0%) | after a round | 170 | growing | B | 0% |
| 11 Jun 2025 | $1.0B | $730M – $1.9B | $1.3B (+30%) | after a round | 170 | growing | B | 0% |
| 1 Jul 2025 | $1.1B | $730M – $1.9B | $1.3B (+28%) | after a round | 170 | growing | B | 0% |
| 1 Aug 2025 | $1.1B | $730M – $1.9B | $1.3B (+25%) | after a round | 257 | growing | B | 0% |
| 1 Sep 2025 | $1.1B | $730M – $1.9B | $1.3B (+22%) | after a round | 257 | growing | B | 0% |
| 1 Oct 2025 | $1.1B | $753M – $2.0B | $1.4B (+22%) | after a round | 296 | growing | B | 0% |
| 1 Nov 2025 | $1.2B | $753M – $2.0B | $1.4B (+19%) | after a round | 296 | growing | B | 0% |
| 1 Dec 2025 | $1.2B | $753M – $2.0B | $1.4B (+17%) | after a round | 296 | growing | B | 0% |
| 1 Jan 2026 | $1.2B | $753M – $2.0B | $1.4B (+14%) | after a round | 296 | growing | B | 0% |
| 1 Feb 2026 | $1.3B | $796M – $2.1B | $1.5B (+13%) | after a round | 381 | growing | B | 0% |
| 1 Mar 2026 | $1.3B | $796M – $2.1B | $1.5B (+10%) | after a round | 381 | growing | B | 0% |
| 1 Apr 2026 | $1.4B | $796M – $2.1B | $1.5B (+7%) | after a round | 381 | growing | B | 0% |
| 1 May 2026 | $1.4B | $796M – $2.1B | $1.5B (+4%) | after a round | 381 | growing | B | 0% |
| 1 Jun 2026 | $1.5B | $829M – $2.2B | $1.5B (+1%) | after a round | 457 | growing | B | 0% |
| 1 Jul 2026 | $1.5B | $832M – $2.2B | $1.5B (0%) | after a round | 457 | growing | B | 0% |
| 1 Aug 2026 | $1.6B | $856M – $2.2B | $1.6B (0%) | after a round | 506 | growing | B | 0% |
| 4 Aug 2026 | $2.0B | $1.7B – $3.0B | $2.6B (+30%) | after a round | 506 | growing | A | 0% |
| 1 Sep 2026 | $2.0B | $1.7B – $3.0B | $2.6B (+27%) | after a round | 506 | growing | A | 0% |
| 1 Oct 2026 | $2.1B | $1.7B – $3.1B | $2.7B (+28%) | after a round | 581 | growing | A | 0% |
| 24 Oct 2026 | $2.1B | $1.7B – $3.2B | $2.7B (+28%) | after a round | 645 | growing | A | 0% |
Key facts about Horizon3.ai
- Founded
- 2019
- Headquarters
- Dover, United States
- Employees
- about 645 +118% in a year
- Total raised
- $429M
- Funding rounds
- 6
- Last round
- Series E Aug 2026
Horizon3.ai was founded in 2019 by Anthony Pillitiere and Snehal Antani.
Horizon3.ai funding history
Horizon3.ai has 6 funding rounds on record, from Jan 2020 to Aug 2026, $429M in total. The latest disclosed valuation is $2.00B post-money (Series E, Aug 2026).
Series E 3 Aug 2026
Led by NightDragon, New Enterprise Associates; with Acrew Capital, Blue Cloud Ventures, Demeter Group, EDBI, PSG, SAIC Capital, Sapphire Ventures, Craft Ventures, Prosperity7 Ventures, Qualcomm Ventures, Ridge Ventures, SignalFire.
Sources: thecyberwire.com, en.wowtale.net, craftventures.com and 3 more
$250M
$2.00B post-money
Series D 10 Jun 2025
Led by New Enterprise Associates; with SignalFire, Craft Ventures, 9Yards Capital.
Sources: horizon3.ai, businesswire.com, horizon3.ai and 4 more
$100M
$40M
$30M
Series A 1 Feb 2021
Led by SignalFire.
$5.0M
$50M post-money
Seed 23 Jan 2020
Led by SignalFire; with Ridge Ventures.
$3.5M
Horizon3.ai investors
15 investors have backed Horizon3.ai; SignalFire, Craft Ventures and New Enterprise Associates and 1 more led at least one round.
- Craft Ventures lead, 3 rounds
- New Enterprise Associates lead, 2 rounds
- 9Yards Capital
- Demeter Group
- EDBI
- Qualcomm Ventures
- Sapphire Ventures
What Horizon3.ai does
Horizon3.ai works in tech companies, with 15 recorded offerings and customers in cybersecurity, government, healthcare and education.
Horizon3 AI, Inc., known as Horizon3.ai, is an American cybersecurity company engaged in developing autonomous security solutions, including autonomous pentesting, penetration testing, and virtual red team exercises. The company operates a multi-tenant SaaS platform that provides continuous risk assessment, remediation guidance, and rapid response to cybersecurity threats. Horizon3.ai serves organizations in sectors such as education, healthcare, manufacturing, supply chain, financial services, and public sector, and supports cloud, on-premises, and hybrid infrastructure. The company utilizes machine learning, artificial intelligence, and generative AI technologies to deliver evidence-based security solutions.
Description from Veridion's company data.
Products and services
- Autonomous Penetration Testing Services
- Virtual Red Team Exercise Services
- Continuous Risk Assessment and Remediation Solutions
- AI-Powered Security Platform Development
- Knowledge Graph Analytics Engine Development
- Inference Engine Development
- Multi-Tenant SaaS Platform Delivery
- Cloud Infrastructure Pentesting Services
- Kubernetes Pentesting Services
- Hybrid Infrastructure Pentesting Services
- Rapid Security Response Services
- Phishing Impact Testing Services
- AD Password Audit Services
- Tripwire Detection Services
- Customized Security Posture Enablement Services
Markets
- Cybersecurity
- Government
- Healthcare
- Education
- Manufacturing
- Supply Chain
- Financial Services
- Public Sector
Technology
- Knowledge Graph Analytics Engine
- Inference Engines
- Machine Learning for Autonomous Security Testing
- Artificial Intelligence for Security Automation
- GenAI-Driven Security Solutions
Business model
- Business-to-Business
- Software-as-a-Service
- Enterprise
Industry codes (NAICS)
- 541690 Other Scientific and Technical Consulting Services 70% match
- 513210 Software Publishers 30% match
Questions about Horizon3.ai
What is Horizon3.ai worth?
Valuation $2.1B (range $1.7B to $3.2B), as of 24 Oct 2026. The last disclosed valuation was $2.00B (Series E, Aug 2026).
Has Horizon3.ai raised money?
Horizon3.ai has 6 funding rounds on record, from Jan 2020 to Aug 2026, $429M in total. The latest disclosed valuation is $2.00B post-money (Series E, Aug 2026).
Who has invested in Horizon3.ai?
SignalFire, Craft Ventures, New Enterprise Associates, NightDragon, Ridge Ventures and 9Yards Capital, and 9 more. Lead investors include SignalFire, Craft Ventures, New Enterprise Associates and NightDragon.
How many people work at Horizon3.ai?
About 645, up 118% over the last year. Headcount grew from 15 in Jan 2021 to 645 in Oct 2026.
What does Horizon3.ai do?
Horizon3.ai works in tech companies, with 15 recorded offerings and customers in cybersecurity, government, healthcare and education. Its main offerings are autonomous penetration testing services, virtual red team exercise services and continuous risk assessment and remediation solutions.
When was Horizon3.ai founded, and where is it based?
Horizon3.ai was founded in 2019 and is based in Dover, United States. It has about 645 employees, up 118% over the last year.