QUALYS, INC.

Qualys is a pioneer in cloud-based IT security and compliance. It provides a unified platform for vulnerability management, policy compliance, web application security, and asset inventory across global IT environments. Philippe Courtot founded it in 1999 in Foster City, California. Qualys was delivering security as a service from the cloud long before SaaS became mainstream.

The Qualys Cloud Platform integrates more than 20 security and compliance apps through a single interface. The flagship is VMDR, Vulnerability Management Detection and Response, which combines asset discovery, vulnerability assessment, threat prioritization, and patch orchestration into a continuous workflow. Policy Compliance automates regulatory assessments against benchmarks like CIS and DISA STIG. Web Application Scanning finds OWASP Top 10 vulnerabilities in web apps and APIs.

The distributed sensor architecture is a strength. Physical scanners, virtual scanners, lightweight cloud agents, passive network analyzers, and container sensors provide coverage across on-premises, cloud, container, and IoT environments. Millions of endpoints run Qualys agents worldwide, feeding real-time telemetry into a large security data lake.

Over 10,000 customers in more than 130 countries use the platform, including a majority of the Forbes Global 100. Qualys is one of the most profitable pure-play cybersecurity SaaS companies around. Gross margins top 80%. Operating margins exceed 35%. Annual revenue is roughly $600 million. The company is debt-free and employs about 2,000 people. The capital-efficient, founder-led approach has been a hallmark throughout its history.