# Censys

> Censys is a cybersecurity company that runs one of the most comprehensive real-time maps of the public internet. Born from the ZMap internet-scanning project at the University of Michigan, its Internet Intelligence Platform scans billions of IP addresses and certificates to power attack surface management, threat hunting, and exposure management. Trusted by more than half of the Fortune 500 and by U.S. intelligence agencies, Censys helps defenders see what attackers can see - unknown assets, exposed services, and adversary infrastructure - so they can find and fix risk before it is exploited.

- **Founded:** 2017
- **Headquarters:** Ann Arbor, Michigan, United States
- **Founders:** Zakir Durumeric (Founder & Chief Scientist (creator of ZMap and Censys)), David Adrian (Co-founder), J. Alex Halderman (Co-founder (faculty advisor, University of Michigan)), David Corcoran (Co-founder (early CEO / commercialization))
- **Team size:** Approximately 170-300 employees
- **Products:** Censys Search, Attack Surface Management (ASM), Internet Intelligence Platform, Censys Data / API, ZMap (open source)
- **Notable:** Grew out of the ZMap project, which can scan the entire public IPv4 internet in under 45 minutes., Selected by the U.S. Office of the Director of National Intelligence to serve U.S. intelligence agencies., Trusted by more than 50% of the Fortune 500 and 300,000+ security practitioners.

## Products & services

- **Censys Search** — A searchable index of internet hosts, services, and certificates that lets researchers and defenders query the internet in real time.
- **Attack Surface Management (ASM)** — Continuously discovers an organization's known and unknown internet-facing assets, cloud resources, and associated risks, scoring exposures by severity.
- **Internet Intelligence Platform** — Comprehensive, continuously refreshed dataset of internet infrastructure powering threat hunting, adversary infrastructure tracking, and exposure management.
- **Censys Data / API** — Programmatic access to Censys internet datasets and certificate databases for enrichment, automation, and integration into security workflows.
- **ZMap (open source)** — The open-source high-speed internet scanner that seeded Censys; capable of scanning the public IPv4 space in under 45 minutes.

## Achievements

- Grew out of the ZMap project, which can scan the entire public IPv4 internet in under 45 minutes.
- Selected by the U.S. Office of the Director of National Intelligence to serve U.S. intelligence agencies.
- Trusted by more than 50% of the Fortune 500 and 300,000+ security practitioners.
- Raised roughly $149M in total funding across seed through 2026.
- Refreshes internet data daily by scanning billions of IP addresses and certificates.

## Latest updates

- **2026-03** — Raised $70M in strategic funding ($40M equity + $30M debt) led by Morgan Stanley Expansion Capital to accelerate AI-driven products, bringing total funding to ~$149M.
- **2024-11** — Selected by the Office of the Director of National Intelligence to provide its Internet Intelligence Platform to U.S. intelligence agencies.
- **2024-11** — Announced a ServiceNow integration to expand its integrations marketplace.
- **2024** — Repositioned around the 'Internet Intelligence Platform' spanning threat hunting, attack surface management, and exposure management.

## Links

- Website: https://censys.com
- LinkedIn: https://www.linkedin.com/company/censysio
- Twitter/X: https://twitter.com/censysio
- GitHub: https://github.com/censys
- YouTube: https://www.youtube.com/@Censys

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Profile page: https://yespress.io/censys
Published by YesPress — https://yespress.io
Last updated: 2026-07-13