- ThreatFox — Community-driven IOC feed
- URLhaus — Malicious URL tracker
- Feodo Tracker — Banking trojan command and control trackers
- MalwareBazaar — Malware sample and hash sharing platform
- AlienVault OTX — Open threat exchange community
- Spamhaus — Blocklists for IPs, domains, and spam sources
- AbuseIPDB — Community-reported IP abuse database
- CIRCL OSINT Feeds — Public OSINT-based threat feeds from Luxembourg
- Abuse.ch SSLBL — SSL certificate blocklist for malicious infrastructure
- PhishTank — Community phishing URL repository (overlaps phishing but also feed source)
- OpenPhish — Automated phishing intelligence feed
- GreyNoise — Contextual intelligence for internet scanners
- Shodan Alerts — Monitor exposure of internet-connected assets
- Censys Search and Data — Enriched dataset of hosts and certificates