Cybersecurity firm ZeroFOX Inc. said today it has acquired “dark web” intelligence research firm Vigilante ATI Inc. for an undisclosed sum.

Founded in 2003, Vigilante offers business-focused security monitoring solutions through a combination of consulting, managed services and threat intelligence. The company is best known as an expert in threat intelligence on the dark web, a shady corner of the internet reachable with special software. Vigilante supports threat hunting and cyber persona cultivation in the underground economy.

The company’s main product, Vigilante, offers risk-sensitive organizations the ability to use advanced automation to better detect and act on threats to their business. Along with managing compliance with security regulations and policies and gaining the insight needed to prioritize investments and resource assignments, Vigilante enables companies to extend their use of information technology to achieve their objectives.

Vigilante doesn’t name its customers, but the company says it provides services for various companies across a diverse array of industries, including many of the Fortune 50.

ZeroFOX will add Vigilante’s global team of expert operatives and analysts to enable access to unique data sets and exotic threat research that it claims is “unattainable by any other provider.” The company also said the acquisition delivers the industry’s most robust ability to understand public attack surface exposure and protect organizations on the dark web at an even greater scale.

“The dark web and criminal underground are critical requirements of modern threat intelligence programs,” James C. Foster, chief executive officer of ZeroFox, said in a statement. “Our customers need a clear view of the underground economy, how bots may be attacking them or if their credentials, credit cards, personally identifiable information and other information could be traded there, as well as understanding emerging tactics, exploits and vulnerabilities.”

There’s no public record of Vigilante having raised venture capital funding prior to its acquisition. ZeroFOX, however, has gathered multiple rounds of funding. According to Crunchbase, ZeroFOX has raised $154.2 million to date from investors that include Redline Capital, Hercules Capital, New Enterprise Associates, Highland Capital Partners, Intel Capital and Core Capital. ZeroFOX’s last venture capital round was $74 million in February 2020.

Photo: ZeroFox