# Horizon3 AI

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/horizon3-ai

- Industry: IT Security/Cybersecurity
- Headquarters: San Francisco, US
- Website: www.horizon3.ai
- Total disclosed funding: $404M
- Latest round: Series E (Aug 3, 2026)
- Investors on record: 15

## About

Based in the US, Horizon3 AI, Inc. offers a cybersecurity platform that provides security pathways for cyber threats.

Horizon3 AI, Inc. founded in 2019 based in California, US, by Snehal Antani (CEO) and Anthony Pillitiere. In August 2026, Horizon 3 AI, Inc. raised USD 250 million in series E funding co-led by NightDragon and New Enterprise Associates, with participation from Craft Ventures, SignalFire, Prosperity7, Ridge Ventures, Qualcomm Ventures, Blue Cloud Ventures, EDBI, Demeter Group, PSG Equity, SAIC Venture Capital, and Sapphire Ventures.

Horizon3 AI, Inc. develops NodeZero, an autonomous, agentless penetration-testing platform that safely simulates real-world attacks across internal, external, cloud, Kubernetes, and identity environments. The platform chains together misconfigurations, weak credentials, and exposed data to reveal exploitable attack paths, provides prioritized remediation guidance, and verifies fixes. Additional capabilities include Tripwires for attacker detection, Rapid Response, and NodeZero WebApp Pentesting for web-application security testing.

Horizon3 AI, Inc. generates its revenue primarily through subscription-based licensing of its NodeZero autonomous pentesting platform to enterprises, government agencies, financial institutions, and healthcare organizations across on-premises, cloud, and hybrid environments. The company sells through a channel-first model, working extensively with managed security service providers and system integrators, and also derives revenue from premium add-on modules such as Tripwires and Rapid Response.

The company will use the August 2026 funding to scale sales, marketing and channel operations; expand in Singapore, Australia and EMEA; and accelerate product development, including autonomous blue-team agents that remediate findings from NodeZero penetration tests.

## Funding rounds

- Series E, Aug 3, 2026, $250M — New Enterprise Associates, Sapphire Ventures, Ridge Ventures, Qualcomm Ventures, Demeter Group, Blue Cloud Ventures, SignalFire, SAIC Venture Capital, Craft Ventures, NightDragon, Acrew Capital, PSG Equity, Prosperity7, EDBI
- Series D, May 8, 2025, $73M — New Enterprise Associates, SignalFire, Craft Ventures, 9Yards Capital
- Series C, Jul 18, 2023, $38M — SignalFire, Craft Ventures
- Series B, Oct 29, 2021, $35M — SignalFire
- Series A, Feb 2, 2021, $5M — SignalFire
- Seed, Jan 24, 2020, $2.5M — Ridge Ventures, SignalFire

## Investors

- Ridge Ventures (https://capitalatlas.ai/funds/ridge-ventures) — Seed, Series E
- SignalFire (https://capitalatlas.ai/funds/signalfire) — Seed, Series A, Series B, Series C, Series D, Series E
- Craft Ventures (https://capitalatlas.ai/funds/craft-ventures) — Series C, Series D, Series E
- New Enterprise Associates (https://capitalatlas.ai/funds/new-enterprise-associates) — Series D, Series E
- 9Yards Capital (https://capitalatlas.ai/funds/9yards-capital) — Series D
- Sapphire Ventures (https://capitalatlas.ai/funds/sapphire-ventures) — Series E
- Qualcomm Ventures (https://capitalatlas.ai/funds/qualcomm-ventures) — Series E
- Demeter Group (https://capitalatlas.ai/funds/demeter-group) — Series E
- Blue Cloud Ventures (https://capitalatlas.ai/funds/blue-cloud-ventures) — Series E
- SAIC Venture Capital (https://capitalatlas.ai/funds/saic-venture-capital) — Series E
- NightDragon (https://capitalatlas.ai/funds/nightdragon) — Series E
- Acrew Capital (https://capitalatlas.ai/funds/acrew-capital) — Series E
- PSG Equity (https://capitalatlas.ai/funds/psg-equity) — Series E
- Prosperity7 (https://capitalatlas.ai/funds/prosperity7) — Series E
- EDBI — Series E