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