Horizon3.ai builds NodeZero, an autonomous security testing platform that runs penetration tests against an organization's live production environment without requiring persistent agents or credentials to be pre-staged. Rather than producing a list of theoretical CVEs, NodeZero chains weaknesses together the way an attacker would and proves exploitability, then reports the specific attack paths that led to compromise so teams can prioritize fixes by real risk. The company says NodeZero learns from hundreds of thousands of autonomous tests run in production. It was founded in San Francisco by Snehal Antani and Anthony Pillitiere.
Funding
In June 2025 Horizon3.ai announced a $100 million Series D led by NEA, bringing total capital raised to $178.5 million across its history.