Tenable, Inc. is a cybersecurity company based in Columbia, Maryland, founded in 2002. It specializes in vulnerability management and exposure management solutions, with its flagship product, Nessus, being a widely trusted vulnerability scanner since its development in 1998. Tenable serves around 44,000 customers, including a significant portion of the Fortune 500, establishing a strong reputation in the cybersecurity field. The core offering from Tenable is Tenable One, an exposure management platform that provides organizations with visibility and insight across their entire attack surface. This platform helps businesses identify and manage cyber risks across various environments, including IT infrastructure, cloud, and operational technology. Tenable also offers a suite of solutions addressing modern security challenges, such as container security and data security posture management, supported by strategic acquisitions. Their services include vulnerability scanning and cyber exposure quantification, enabling customers to effectively manage and reduce cyber risks.