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Censys certificate search for exploring TLS certificates, domains, issuers, and transparency logs.

Islegitsite helps search threat intelligence, IP reputation, domains, and security investigation data.

Threat intelligence search platform for malware indicators, IPs, domains, URLs, and hashes.

Internet asset search engine for domains, IPs, ports, certificates, and exposed services.

OSINT search engine for exposed assets, IPs, domains, certificates, and network data.

API to search current and historical DNS records, current and historical WHOIS, technologies used by sites and whois search for phone, email, address,

Threat intelligence search engine for domains, IPs, hashes, malware, and related indicators.

Aware Online tool for searching websites, domains, indexed pages, and related OSINT clues.

Verisign WHOIS lookup for checking domain registration records and registry information.

GitHub collection of APT reports, threat actor notes, and security research documents.

Open source intelligence toolkit for gathering and analyzing information from websites and online sources.

Russian-language guide for reducing online exposure and understanding counter-OSINT practices.

Guide to free and open source privacy tools, safer apps, and alternatives to data-heavy services.

Python package template for building command-line OSINT tools with a reusable project structure.

Python OSINT crawler for extracting URLs, files, endpoints, and related website data.

Open source team chat platform for messaging, collaboration, and self-hosted communication.

Free and open-source domain and infrastructure research toolkit combining DNS, RDAP, WHOIS, passive subdomain discovery, IP and ASN data, email authen

Exploit-DB paper archive with security research, exploitation papers, and technical writeups.

Exploit-DB binary exploit archive for security research and controlled testing.

Security research toolkit for extracting, transforming, and analyzing data during investigation workflows.

Research database covering Russian aggression, military activity, and related open-source evidence.

Free, no-login IP reputation lookup that aggregates up to 8 risk sources, flags residential vs datacenter, and profiles /24 C-block neighbors. Also of

OSINT tool for collecting domain, IP, ASN, and infrastructure intelligence from multiple sources.

Python tool that identifies hashes, emails, IPs, URLs, and other strings found in text or files.