Tenable was founded in September 2002 as
Tenable Network Security, Inc. by Ron Gula, Jack Huffard, and Renaud Deraison. In April 1998, at age 17, Deraison had created the Nessus
vulnerability scanner software, which he folded into Tenable upon creation of the company. In 2002, Gula, who worked for the
National Security Agency in the 1990s, sold a company he founded to
Enterasys Networks and was looking to start another company. In 2004,
Marcus J. Ranum was hired as
chief security officer. In October 2005, to generate income for the company and to stop empowering competition, Nessus became
proprietary software, rather than
open-source software via the
GNU General Public License. At that time, the software was
forked;
OpenVAS became the
open-source software version of the program. In September 2012, Tenable received $50 million in
series A round funding from
Accel Partners. Also that month, the company entered into a partnership to provide cybersecurity services for the
United States Intelligence Community, partnering with
In-Q-Tel. In 2015, Tenable received $250 million in a series B round led by
Insight Partners. In 2016, Gula resigned as CEO, becoming chairman. Effective January 2017,
Amit Yoran became CEO of the company and later that year, the company was renamed Tenable, Inc. In October 2022, the company launched Tenable One, an exposure management platform. In January 2023, the company launched a
venture capital division, with plans to invest up to $25 million. In December 2024, Yoran took a medical leave after a cancer diagnosis and CFO Stephen Vintz and COO Mark Thurmond were appointed interim co-CEOs; Yoran died in January 2025. Art Coviello was named chairman. In the same month, the company acquired Vulcan Cyber.
Acquisitions == References ==