Nessus, launched by Tenable in 2002 and headquartered in Columbia, Maryland, is one of the most widely deployed vulnerability scanners, covering 50,000+ detection rules and 400+ system and application checks — the essential tool for enterprise vulnerability management.
Siteimprove is an AI-driven website quality platform founded in Copenhagen, Denmark in 2003, covering accessibility compliance (WCAG/ADA/EAA), digital governance, experience analytics, and SEO for education, government, and large enterprises.
Chef is an infrastructure configuration management platform founded in Seattle in 2008, using a Ruby DSL to declaratively define server state, providing configuration management, compliance auditing, and automated application deployment.