Censys

Censys is a cybersecurity company that focuses on Internet intelligence and attack surface management. Founded in 2013 by the creators of ZMap, Censys provides a real-time map of the internet to help governments, enterprises, and research institutions identify and defend against cyber threats. The Censys Internet Intelligence Platform is the company's main offering. It continuously scans and analyzes internet-connected devices and services, covering significantly more services than competitors. With the world’s largest certificate database, Censys enables security teams to gain visibility into every host, service, and port across various internet-facing assets. Key capabilities include attack surface management, threat hunting and investigation, real-time internet intelligence, and threat dataset monitoring. Censys serves a diverse customer base, including U.S. government agencies, half of the Fortune 500 companies, security firms, and research organizations. Notable clients include FireEye, Google, NATO, and the U.S. Department of Homeland Security. The platform is recognized for its powerful search functionality and extensive historical data, playing a critical role in enhancing cybersecurity processes.

Computer & Network Security Ann Arbor, United States Founded 2017 ~138 employees Private · Series C

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Employees
138
-4.8% in the 3 months to Jun 2025
Revenue / employee
$321K
Revenue ~$44.3M
Total funding
$653M
Last round Series C, Oct 2023
12-month attrition
20.2%
Tech: 24.8%
H1B filings, FY2026
2
Sponsors visas
Open jobs
5
Last 30 days

Headcount trend

Censys went from 105 employees in Jul 2023 to 138 in Jun 2025. Jan to Jun 2025: 22 people joined, 20 left.

Headcount data through Jun 2025

Org structure

Headcount by department

Other41
Engineering37
Sales22
Operations11
Finance7
Success7
Marketing6
Product4

Hiring now

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H-1B sponsorship

H-1B Sponsorship Limited
H-1B Filings by Department
Engineering5
Operations1

The department split adds up all the years listed above. FY2026 alone: 2 filings.

Funding

  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Oct 2023 · Series C · $50M · Decibel Partners, GV, Greylock
  • Jan 2022 · Series B · $35M · Intel Capital, Google Ventures, Decibel
  • Aug 2020 · Series A · $15.5M · GV, Decibel, Greylock Partners
  • Nov 2018 · Seed · $2.6M · Greylock Partners, GV

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Censys FAQ

How many employees does Censys have?

Censys has about 138 employees, down 4.8% over the 3 months to Jun 2025.

Does Censys sponsor H1B visas?

Yes. Censys filed 2 H1B (LCA) applications in FY2026, according to the latest U.S. Department of Labor disclosures. Most of them were for Engineering roles.

What is Censys's revenue per employee?

Censys makes about $321K in revenue per employee, based on $44.3M annual revenue and 138 employees.

How much funding has Censys raised?

Censys has raised $653.1M in total funding; its latest round was Series C in Oct 2023.

Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles.