microsegmentation
(3)
Airgap Networks Inc. (Acquired by Zscaler)
Airgap Networks was a Santa Clara-based cybersecurity company that built an agentless Zero Trust segmentation platform to stop ransomware and lateral threat movement across enterprise IT, IoT, and OT networks. Using a patented DHCP-proxy architecture, it placed every device in a 'network of one' (a /32 segment) without agents, APIs, or infrastructure upgrades, and shipped an industry-first Ransomware Kill Switch. Founded in 2019 by Ritesh Agrawal and Satish Mohan, the company raised $18.6M before being acquired by Zscaler in April 2024 to extend Zscaler's Zero Trust SASE platform with firewall-free, east-west segmentation.
Illumio
Illumio is a Sunnyvale-based cybersecurity company that pioneered Zero Trust Segmentation. Its Breach Containment Platform - Illumio Segmentation plus the AI-powered Illumio Insights - assumes attackers will get in and focuses on stopping them from spreading. By mapping how applications talk to each other across data centers, public clouds, and endpoints, Illumio lets organizations isolate workloads and contain ransomware and breaches before they become disasters.
Tigera
Tigera is the creator of Calico, the open-source standard for Kubernetes networking and security that powers more than a million clusters every day. From its San Jose headquarters, the company sells Calico Cloud and Calico Enterprise - SaaS and on-prem platforms that bolt active runtime security, zero-trust microsegmentation, and observability onto container environments at any scale.