50 Best Free Cyber Threat Intelligence Tools – 2026

This document compiles a comprehensive list of threat intelligence resources — including IP and domain blocklists, malware sample repositories, phishing and ransomware trackers, YARA rules, and various analytic services — intended as reference feeds and tools for security teams to use for detection, blocking, and enrichment. It is a resource directory and does not report any specific incident, active exploitation, or detailed indicators tied to an ongoing attack.