Open-Source Intelligence (OSINT) is a critical skill, but knowing where to start your training can be overwhelming. The right OSINT training guides and resources can transform you from a novice to a proficient investigator.
We’ve curated five of the most valuable OSINT training guides and platforms, ranging from free foundational resources to world-class professional courses.
1. The Free Foundation: ForensicOSINT.com OSINT Guide
https://www.forensicosint.com/osint-guide
- What it is: A massive, community-driven directory of OSINT tools and resources, perfectly categorized for any investigation.
- Why it’s Essential: This is your free, go-to encyclopedia. Whether you need a specific social media search tool or a niche image verification site, it’s likely listed here.
- Perfect For: Beginners building their toolkit and seasoned pros who need a quick reference.
2. The Practitioner’s Playbook: IntelTechniques.com
- What it is: The online hub for Michael Bazzell, a former FBI investigator and leading OSINT authority. It features his books, podcast, and the renowned IntelTechniques search tool.
- Why it’s Essential: This site offers real-world, practical methodologies used by a professional. The books are considered the bible of OSINT for a reason.
- Perfect For: Investigators who want to learn professional, repeatable processes for data collection and privacy.
OSINT Websites for Cybersecurity: 4 Essential Tools.
Read the Full Guide →3. The Interactive Trainer: Plessas.net Online Training
https://plessas.net/online-training
- What it is: Developer and OSINT expert
[RECON]Plessas offers interactive, hands-on training modules that simulate real investigative scenarios. - Why it’s Essential: You learn by doing. The modules are engaging and cover specific skills like social media investigation, cryptocurrency tracing, and more.
- Perfect For: Visual learners and those who want to test their skills in a practical, gamified environment.
4. The Gold Standard: SANS OSINT Course
https://www.sans.org/cyber-security-courses/practical-open-source-intelligence
- What it is: FOR578: Cyber Intelligence is a premier, hands-on course from SANS, a global leader in cybersecurity training.
- Why it’s Essential: This is the professional standard for a comprehensive, structured education in OSINT. It’s rigorous, respected, and leads to a GIAC certification (GOSI).
- Perfect For: Cybersecurity professionals, government personnel, and anyone seeking a formal, vendor-neutral certification to advance their career.
5. The Foundational Mindset: “How To Ask Questions The Smart Way”
http://www.catb.org/esr/faqs/smart-questions.html
- What it is: An essay by Eric S. Raymond, this isn’t a traditional OSINT guide, but it’s one of the most important resources an investigator can read.
- Why it’s Essential: OSINT is 80% critical thinking and 20% tools. This guide teaches you how to formulate precise, effective questions—a skill that directly translates to building better search queries and solving complex investigations.
- Perfect For: Every single investigator, regardless of skill level. It builds the analytical foundation that all other technical skills rely on.
Choosing Your Path in OSINT Training
The best path depends on your goals:
- Just Starting? Begin with the ForensicOSINT Guide and read “How To Ask Questions The Smart Way.”
- Building Professional Skills? Invest in IntelTechniques books and consider Plessas modules.
- Seeking Career Credibility? The SANS course is the undeniable gold standard.
By leveraging these powerful OSINT training guides, you can systematically build the skills needed to uncover the truth in a digital world.
Which of these OSINT training guides are you most excited to try? Share your journey in the comments below!