Censys

Censys is a search engine that allows users to find and analyze devices connected to the internet. It was founded in 2015 by Rob Graham and is headquartered in San Francisco, California. The platform provides a comprehensive database of internet-connected devices, including servers, routers, and other networked hardware, by scanning the internet's IPv4 address space. Censys collects data on various aspects of these devices, such as their software versions, open ports, and SSL/TLS certificates. This information is made accessible through a web interface, allowing users to search for specific devices or analyze trends in internet infrastructure. The data collected by Censys is used for a variety of purposes, including cybersecurity research, network management, and compliance with industry standards. The platform also offers an API for developers to integrate Censys data into their own applications. Censys has gained attention for its role in exposing vulnerabilities and misconfigurations in internet-connected devices, contributing to the broader effort to improve internet security.