Open Source Intelligence (OSINT)

Publicly available threat data

Filter Security Solutions

Hunter.io

San Francisco, CA, US
Verified Business

Email finder and verification tool for security research and OSINT.

Open Source Intelligence (OSINT)

ZoomEye

Shanghai, Shanghai, CN
Verified Business

Cyberspace search engine by Knownsec for network device discovery.

Open Source Intelligence (OSINT)

Fofa

Hangzhou, Zhejiang, CN
Verified Business

Cyberspace search engine for discovering internet assets and vulnerabilities.

Open Source Intelligence (OSINT)

Criminal IP

Seongnam, Gyeonggi, KR
Verified Business

AI-based search engine for threat intelligence and cyber threat hunting.

Open Source Intelligence (OSINT)

Spyse

San Francisco, CA, US
Verified Business

Complete internet assets search engine for cybersecurity professionals.

Open Source Intelligence (OSINT)

BinaryEdge

Lisbon, Lisbon, PT
Verified Business

Cybersecurity data platform scanning the internet for threat intelligence.

Open Source Intelligence (OSINT)

GreyNoise

McLean, VA, US
Verified Business

Internet background noise analyzer identifying malicious and benign internet scanners.

Open Source Intelligence (OSINT)

Censys

Ann Arbor, MI, US
Verified Business

Internet-wide scanning and enumeration platform for security research.

Open Source Intelligence (OSINT)

Shodan

Houston, TX, US
Verified Business

Search engine for internet-connected devices and security research.

Open Source Intelligence (OSINT)

AlienVault OTX

San Mateo, CA, US
Verified Business

Open threat exchange platform sharing 19+ million indicators of compromise daily.

Open Source Intelligence (OSINT)

Open Source Intelligence (OSINT) platforms aggregate and curate publicly available threat intelligence from diverse sources including security vendor blogs, research publications, social media, public malware repositories, and community-driven threat sharing initiatives. These platforms democratize access to threat intelligence by collecting, normalizing, and distributing freely available threat data in standardized formats that enable automated consumption and analysis by security tools and analysts.

OSINT aggregation platforms typically collect indicators of compromise from multiple public sources, validate and de-duplicate threat data, provide reputation scoring and confidence ratings, offer multiple feed formats and delivery mechanisms, and maintain historical threat data archives. Many platforms also provide community features for threat intelligence sharing, collaborative analysis, and crowd-sourced threat validation among security professionals.

Organizations leverage OSINT platforms to supplement commercial threat intelligence, reduce intelligence acquisition costs, access diverse threat perspectives from global security communities, validate threats against multiple sources, and maintain baseline threat awareness without significant financial investment. While OSINT may lack the timeliness and curation quality of commercial sources, it provides valuable breadth of coverage and enables smaller organizations to implement threat intelligence programs with limited budgets.