Tenable Nessus

Tenable, Inc., headquartered in Columbia, Maryland, is a global leader in cybersecurity, specializing in vulnerability and exposure management. Founded in 2002, the company is best known for its flagship product, Nessus, a widely deployed vulnerability assessment tool. Tenable serves over 44,000 customers worldwide, including 65% of the Fortune 500 and 50% of the Global 2000. The company’s mission is to help organizations identify and mitigate cyber risks across IT, cloud, and operational technology (OT) environments.

• Origins: Nessus was initially developed as an open-source project in 1998 by Renaud Deraison before becoming a proprietary solution under Tenable in 2005. This transition enabled the company to offer commercial-grade support and development while maintaining a free version for individual users.
• Growth: Since its founding in 2002, Tenable has evolved into a market leader in exposure management. Its Nessus scanner has been installed over 2 million times globally and protects more than 27,000 businesses.
• Global Impact: With operations spanning multiple regions, Tenable has become synonymous with vulnerability management and is recognized for its innovation in cybersecurity solutions.

• Funding History: Tenable has raised $301.55 million across 10 funding rounds. The most notable event was its IPO on July 26, 2018, which raised $250.7 million.
• Valuation: As of its IPO in 2018, Tenable achieved a significant valuation milestone. While specific post-IPO valuations are not disclosed publicly, the company’s growth trajectory and strong market position suggest continued financial success.

Tenable offers a comprehensive suite of cybersecurity products tailored to various needs:

1. Nessus Family:
   • Nessus Professional: A versatile vulnerability scanner for IT practitioners.
   • Nessus Expert: Advanced features like Infrastructure-as-Code (IaC) scanning and external attack surface assessments.
   • Nessus Essentials: A free version for small-scale use.

   • Nessus Manager/Cloud: Centralized or SaaS-based solutions for larger organizations.

      

2. Other Key Products:
   • Tenable One: A unified exposure management platform offering visibility across assets, identities, and risks.
   • Tenable.ad: Focuses on securing Active Directory environments.

   • Tenable Cloud Security & Identity Exposure: Solutions for cloud and identity risk management.

      

3. Features:
   • Daily plugin updates to stay ahead of emerging vulnerabilities.
   • Over 450 pre-configured templates for compliance checks (e.g., CIS benchmarks).
   • Integration with penetration testing tools like Metasploit.
   • Customizable reporting and live results for real-time insights.

Tenable has strategically acquired companies to broaden its product portfolio:

1. Alsid (2021): Strengthened Active Directory security with the launch of Tenable.ad

    

2. Ermetic (2023): Expanded cloud security capabilities by integrating Cloud-Native Application Protection Platform (CNAPP) features into its offerings

    

3. Other acquisitions have contributed to advancements in operational technology (OT) security and exposure management.

These acquisitions highlight Tenable’s commitment to innovation and staying competitive in the rapidly evolving cybersecurity landscape.

Recent innovations include:

• Enhanced IaC scanning capabilities via Terrascan integration.
• Live Results functionality for offline vulnerability assessments.
• Grouped views that simplify issue prioritization by categorizing vulnerabilities.
• Expanded cloud security features through Ermetic integration.

Tenable emphasizes an inclusive culture underpinned by three pillars: Workforce, Workplace, and Community:

1. Workforce: Focuses on attracting diverse talent through partnerships with inclusion-focused organizations.
2. Workplace: Promotes a sense of belonging where employees can thrive regardless of background.
3. Community: Invests in STEM education and social good initiatives to make a positive impact globally.

The company’s values—collaboration ("One Tenable"), delivering results, caring for stakeholders, and making meaningful contributions—are central to its culture.

Tenable serves a diverse user base across industries such as financial services, healthcare, retail, energy, and government sectors. Its Nessus platform is particularly popular among IT practitioners due to its ease of use and extensive feature set. The company also fosters an active community through free tools like Nessus Essentials and ongoing engagement via forums and training resources.