Censys is a leading provider of continuous attack surface management.

Censys helps information security practitioners discover, monitor, and analyze devices that are accessible from the Internet.

Censys was co-founded in 2017 at the University of Michigan, by Zakir Durumeric, Alex Halderman, David Adrian, Dave Corcoran and Brian Kelly. The company is headquartered in Ann Arbor, Michigan.


Censys collects Internet data about every host online and enriches that data with the security information you need, providing you with the level of insight you need to secure your company.


Censys' dashboard lets security teams visualize the entire dynamic attack surface and begin investigations into risks, misconfigurations, and anomalies. Companies can drill down into potential risks on the attack surface, including the asset risk type, the number of hosts affected, and how critical the risk is. 


Censys has performed thousands of Internet-wide scans, consisting of trillions of probes. Customers like FireEye, Google, NATO, Swiss Armed Forces, the U.S. Department of Homeland Security, and over 10% of the Fortune 500 rely on the company's Internet-wide continuous visibility platform to discover and prevent cybersecurity threats.


Censys is backed by Intel Capital, GV, Greylock Partners, Decibel, HD Moore, Mango Capital, and others. The company raised $35M in a Series B round on Jan 27, 2022. This brings Censys' total funding to $53.1M to date.



  • Year founded: 2017
  • Funding Info: $53.1M over 3 Rounds (Latest Funding Type: Series B)
  • Yearly Revenue: NA
  • Employee Size: 51-200
  • Business Valuation: NA
  • City/Town: Ann Arbor
  • State: Michigan
  • Country: United States
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