Qualys, Inc. is an American cybersecurity company headquartered in Foster City, California that offers a cloud-based platform for IT asset discovery, security assessment, compliance management and remediation across on-premises, perimeter, endpoint and cloud environments. The Qualys Cloud Platform automates the lifecycle of asset inventory, vulnerability scanning, policy compliance checks and issue remediation. The company reaches customers through direct sales and partnerships with managed service providers, consultants and value-added resellers.