Illumio vs Horizon3.ai
Side-by-side comparison of AI visibility scores, market position, and capabilities
Illumio is a zero trust segmentation platform that maps application dependencies and enforces workload-level policy to contain breaches across cloud, data center, and endpoints.
About
Illumio is a cybersecurity company headquartered in Sunnyvale, California that pioneered the zero trust segmentation category — providing visibility into application communication flows and enforcing workload-level micro-segmentation policies across hybrid cloud, data center, and endpoint environments to limit the lateral movement that makes ransomware and supply chain attacks so damaging. Founded in 2013, Illumio raised $225 million in a 2021 Series F that valued the company at $2.75 billion, reflecting enterprise demand for segmentation technology as a breach containment control independent of network perimeter tools. The company's core thesis is that breaches are inevitable and that security programs must invest in preventing attackers who have entered the environment from moving freely to reach high-value targets.
Horizon3.ai's NodeZero platform has executed 170,000+ autonomous pentests across 4,000 companies; reported 137% ARR growth in 1H 2025 with enterprise ARR up 485% YoY;
About
Horizon3.ai is a cybersecurity company founded in 2019 by former US National Security veterans and headquartered in San Francisco. Its flagship product, NodeZero, is an autonomous penetration testing platform that executes real-world attack techniques without agents or disruption — simulating what a sophisticated attacker would do across networks, Active Directory environments, cloud infrastructure, and containerized workloads. NodeZero autonomously discovers and chains vulnerabilities, exfiltrates credentials, and generates remediation guidance, replacing the need for infrequent and expensive manual pentests.
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