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Learn OSINT (Open-source Intelligence) From Scratch (Udemy.com)

Discover emails, passwords, online accounts, locations, phone numbers and much more | No Prior Knowledge Required

Created by: Zaid Sabih

Last updated September 2026

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What you will learn

  • 140+ lectures teaching you how gather info about anything using OSINT
  • Real-life practical OSINT investigations
  • Discover social media profiles, passwords, linked accounts, phone numbers, addresses, documents & much more
  • No prior knowledge required
  • Use AI for OSINT
  • Find & download leaked databases
  • Find passwords, phone numbers, addresses and more
  • Find hidden profiles, accounts, deleted content, comments, tweets and more!
  • Discover accounts linked to a phone number, email, name, alias, email and more!
  • Find addresses linked to a person, phone number, email....etc
  • Find phone numbers linked to people, online accounts, emails and more
  • Scrape & download info from social media profiles such as Instagram, TikTok and more!
  • Discover public cameras
  • Utilize search engines effectively to find sensitive information
  • Use custom search engine operators

How it compares

Against the other 523 rated Udemy courses in Hacking on CourseDuck:

  • Rating4.6 out of 5higher than 72% of them
  • Reviews1,506#142 of 524 by number of reviews
  • Length11.2 hourslonger than 75% of them
  • Last updatedSeptember 2026more recently than 86% of them

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Course Description

Zaid and Saad tamed up to bring you the best OSINT course out there and get you certified as an Open Source Intelligence Professional. Combining Zaid's experience in ethical hacking and teaching over 1 million students world wide, with Saad's amazing and focused OSINT skills.


This course will teach you how to use Open Source Intelligence (OSINT) to gather information about anything. With no prior knowledge required, this course takes you from a beginner to an expert at performing advanced OSINT techniques, giving you the ability to gather information about individuals, companies, email addresses, phone numbers, social media accounts, physical locations, images and more.


Just like our other courses, this course is highly practical, but it won't neglect the theory. We'll start with the basics of open-source intelligence, then we'll dive and start using OSINT to investigate people, companies and individual pieces of information straight away. You'll learn everything by example, by gathering real information online — no boring dry lectures. By the end of the course, you will be an expert in open-source intelligence (OSINT).


To achieve this the course is divided into a number of sections,  each aims to teach you a specific OSINT technique. You'll first learn what is OSINT, why it is used, and who uses it. Then you'll learn how to use OSINT to find real information about targets, starting with just one piece of information (such as a name, email, username) and discovering all kinds of linked information such as hidden accounts, phone numbers, social media presence, leaked information, passwords and much more.


As we proceed, you will be introduced to different OSINT methodologies, tools, and techniques. Everything will be taught through examples and hands-on practicals—no useless or boring lectures!


All the techniques in this course are practical and work against real targets, you'll understand how to investigate each piece of information individually. Therefore by the end of the course you'll be able to start with any piece of information and carry out a full investigation to uncover rated data and information.

By the end of the course, you'll be able to modify these techniques to launch more sophisticated OSINT investigations and adapt them to suit different situations and scenarios.


Here are some of the topics that will be covered in the course:

  • People OSINT

  • Username OSINT

  • Phone OSINT

  • SOCMINT - Social Media OSINT

  • Maps and Satellite OSINT.

  • Image OSINT

  • Website OSINT

  • Search engines operators.

  • Custom search operators.

  • Searching with AI

  • Setting up an OSINT virtual machine

  • Creating a Sock Puppet account

  • Searching for leaked / breached databases

  • Downloading leaked / breached databases

  • Leveraging leaked / breached databases to find sensitive information.

  • Finding passwords in leaked / breached databases.

  • Scraping & downloading posts from Instagram, Tiktok, Snapchat, etc.

  • Finding hidden content, posts, comments, accounts, etc.

  • Discovering linked usernames, accounts, phone numbers, emails, etc.

  • Tracking phone numbers, images, online accounts, etc.

  • Investigating locations with various maps and satellite services

  • Discovering subdomains, hidden website owners, linked websites and more!

  • Using people search engines

  • Reverse image search

  • Geolocation of photos

  • AI image tracking

  • Manual image tracking

  • Facial recognition

  • Voter records lookup

  • Searching Wedding/Baby/Gift registries

  • OSINT automation.

  • Writing OSINT reports.


You'll use the following tools to achieve the above:

  • Tracelabs OSINT VM

  • True People search engine.

  • Phoneinfoga

  • Sherlock

  • Spiderfoot

  • Ghunt

  • Httprobe

  • Sublist3r

  • Instaloader

  • WPScan

  • Google Dorks

  • DorkGPT

  • Google Hacking Database GHDB

  • Exif Tool

  • DeHashed

  • LeakPeek

  • Breach Directory

  • Have I Been Pwned

  • IntelX Tools

  • VirtualBox

  • True People Search

  • OSINT Industries

  • CyberChef

  • OpenStreetMap (OSM)

  • DNSDumpster

  • Wayback Machine

  • FOCA

  • GeoSpy

  • Osintracker



Other topics:

  • Linux basics

  • Using the Linux terminal

  • Linux commands.

  • Installing virtual machines


With this course you'll get 24/7 support, so if you have any questions you can post them in the Q&A section and we'll respond to you within 15 hours.


Check out the curriculum and the course teaser for more info!


Notes:

  • This is the official course to prepare you for the C|OSINT|P (certified OSINT professional) certification.

  • This course is created for educational purposes only. Everything done through it is legal and relies on information that is publicly available on the internet.

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Instructor Details

Zaid Sabih

My name is Zaid Al-Quraishi, I am a professional ethical hacker, computer scientist, and the founder and CEO of zSecurity & Bug-Bounty. I am passionate about utilising my skills to improve the security of organisations and individuals by identifying and resolving vulnerabilities in their systems.

I have in-depth knowledge and experience in the fields of ethical hacking & cyber security, and I have helped over 1 million students worldwide on multiple teaching platforms to gain a better understanding of the subject.

My companies, zSecurity & Bug-Bounty, specialise in providing ethical hacking services and managed bug-bounty programs to help organisations identify and remediate vulnerabilities in their systems.


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Reviews

4.6

1,506 ratings on Udemy

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By Sai Devansh Dhagat on 6/21/2026

All Zaid's course are awesome it's a balance between theory and practical. He explains everything in easy and simple way . Also thanks to all the people who clears doubt within 24 hrs .

By David Diaz on 4/21/2026

This video is Excellent. I already looked all the videos and I already learned alot if you put an effort in watch all the videos. Always take notes of each videos in order to everything in OSINT. Excellent Video. Thank You!!! for your dedication. Great Instructors "Zaid Sabih and Saad Sarraj. From Queens, New York David Diaz

By S M on 1/27/2026

This course is good for beginners and covers the basics clearly. However, the instructor repeats several topics throughout the course, and many sections could have been condensed. Additionally, some of the provided links are not free and others are now restricted.

By Hicham Tijane on 1/25/2026

EXCELLENTE FORMATION. Un contenu de haute qualités, dommage pour les lecteurs francophones pour la traduction. Sinon excellent, je recommande vivement

By Al La on 1/20/2026

I like the course, only thing is bothering me, just this one word "Download" lecturer pronouncing this word incorrectly, something like "downloood". other then that, I think this course is very informative. Thank you

By Daniel Hayes on 11/28/2025

I recently started this OSINT course, and I was genuinely impressed by the quality of the instruction. The instructor has a clear, structured approach to teaching, which made even complex concepts easy to understand. What really set this course apart was the perfect balance between theory and practical application—every lesson was supported with real-world examples, hands-on exercises, and actionable techniques. The course didn’t just tell you what OSINT is; it showed you how to apply it effectively and ethically. By the end, I felt confident using the tools and methods covered, and I now have a much deeper understanding of how OSINT works in practice. Highly recommend this course to anyone wanting to build real, usable OSINT skills!

By Hrishi Ghosalkar on 11/7/2025

Excellent course! I bought two OSINT courses — one from TCM Security and another from Z Security. This course is definitely better compared to Heath Adams’s

By Phen Ing on 10/24/2025

so far is so good. you have a great explantion for each specific searching topics (e.g.,Google Dork, site, filetype, inurl searc, Yandex, and have I been pwned?)..

By Raymund Paglinawan on 10/5/2025

This OSINT course was extremely informative, as it provides both the theory and practical tools behind each investigation. It offered valuable insights into how and where to find specific information, giving a clear understanding of how a professional OSINT investigator operates. I learned a great deal not only about conducting investigations but also about presenting findings in a way that is useful for clients. I’m glad I took this course to further expand my knowledge in cybersecurity and information gathering. Many thanks to Sarraj for an excellent learning experience!

By Big Smoke on 9/21/2025

The amount of content is amazing ! Perfect speed and delivery of the information. It is easy to stop and go so notes, and even practice runs of the principles can be executed. Superior bang for the buck !

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Overall Score : 92 / 100