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• Open Source Intelligence Techniques (Michael Bazzell) — Comprehensive OSINT book and toolkit
• Bellingcat OSINT Guides — Investigative journalism and OSINT techniques
• OSINT Techniques (Sector035’s Curated Lists) — Weekly curated OSINT links and guides
• Handbook of Collective Intelligence — Research and methodology (academic)

• DataExpert - Great European based academy on OSINT, Cybercrime and Cryptocurrency investigations
• OSINT Dojo — Free structured learning path for OSINT
• OSINT Curious — Blog, podcast, and tutorials (archived but valuable)
• Trace Labs OSINT VM & CTFs — Virtual machines and OSINT competitions
• Quiztime — Daily OSINT challenges on Twitter/X
• I-Intelligence - Great European Based Academy on OSINT, Analysis and more
• Bellingcat Workshops — Paid training on open source investigations
• Kase Scenarios - Immersive free and paid OSINT scenarios to learn and train skills

• SecJuice — Articles on OSINT, infosec, and cyber investigations
• NoHat — OSINT and cybersecurity research blog
• SANS OSINT Blog — Professional OSINT articles

• OSINTrack - Another resource directory, but with fancy graphics!

• CyberWire Daily — Cybersecurity news and OSINT-adjacent podcast
• Microsoft Threat Intelligence Podcast - Podcast by Microsoft about threat intelligence, APTs, malware, and actor tradecraft
• Adversary Universe - Podcast by CrowdStrike exploring global threat actors and intrusion operations
• Intel 471 Podcasts - Podcast by Intel 471 covering threat actor profiling, cybercrime intelligence, and dark web insights
• Talking Threat Intelligence - Podcast by Recorded Future about building and using cyber threat intelligence programs
• CTG’s Threat Intelligence Podcast - Podcast by The Counterterrorism Group discussing CTI, terrorism, and global risks
• Cyber Threat Intelligence Podcast - Independent podcast discussing modern CTI frameworks, detection, and mitigation
• Darknet Diaries - Podcast by Jack Rhysider featuring true stories from the dark side of the internet and cyber operations
• Beers with Talos - Podcast by Cisco Talos discussing incident response, threat research, and security trends

• From The Source - OSINT podcast interviewing professionals by BlackDot Solutions
• The Pivot - OSINT podcast interviewing professionals by Maltego
• NeedleStack - Podcast by Authentic8 about OSINT techniques, online investigations, and research tools
• Open Secret - Podcast by OSINT Combine covering open source investigations, intelligence ethics, and analysis workflows
• The OSINTion Podcast - Podcast by The OSINTion focusing on OSINT tradecraft, investigations, and analyst development
• OSINT with ShadowDragon - Podcast by ShadowDragon about OSINT tooling, digital footprints, and real-world investigations
• The World of Intelligence - Podcast by Janes about open-source intelligence, defense analysis, and global security trends
• Cloak & Dagger - Independent OSINT podcast analyzing conflicts, disinformation, and investigative methods