Censys

The foundational technology behind Censys was designed by researchers at the University of Michigan. This team also created the ZMap Scanner, which helped popularize Internet-wide scanning.

Shodan

Shodan gathers information about all devices directly connected to the Internet. If a device is directly hooked up to the Internet then Shodan queries it for various publicly-available information. The types of devices that are indexed can vary tremendously: ranging from small desktops up to nuclear power plants and everything in between.

GreyNoise

GreyNoise Intelligence is a cyber security company that collects, labels, and analyzes Internet-wide scan and attack data.

ZoomEye

ZoomEye is a Cyberspace Search Engine recording information of devices, websites, services and components etc.

ZoomEye has two powerful detection engines Xmap and Wmap aiming at devices and websites in the cyberspace. It can be used to identify all the services and components through 24/7 continuous detection. Therefore it is easier for researchers to understand the component coverage and the damage scope of vulnerabilities.

Fofa.so

FOFA is a cyberspace search engine developed by BAIMAOHUI. 
It helps customers find IP assets quickly. It can help users quickly match network assets and speed up the follow-up work process. 
For example, vulnerability vulnerability scope analysis, application distribution statistics, application popularity ranking statistics, and the like.

Onyphe

ONYPHE is a search engine for open-source and cyber threat intelligence data collected by crawling various sources available on the Internet or by listening to Internet background noise. ONYPHE does correlate this information with data gathered by performing active Internet scanning for connected devices. It then normalizes information and make it available via an API and its search language.

Binaryedge

Scanning the entire internet space and acquiring data that can be transformed into threat intelligence feeds or security reports.

Hunter

Hunter lets you find email addresses in seconds and connect with the people that matter for your business.

Wigle

Wigle consolidates location and information of wireless networks world-wide to a central database, and have user-friendly desktop and web applications that can map, query and update the database via the web.

Ghostproject

• It’s big! 1.4 Billion Clear Text Credentials Discovered in a Single Database?

• The 41GB dump was found on 5th December 2017 in an underground community forum. .
• The database was recently updated with the last set of data inserted on 11/29/2017. The total amount of credentials (usernames/clear text password pairs) is 1,400,553,869.