Resources for CompTIA Security+

I have been studying for Security+ since January. I am planning to sit the exam this month. I have used some different resources to study and wanted to share some I have used and some that are highly used by others.
For my study I used:
Professor Messer’s Security+ Videos (YouTube)
Github
Chatgpt
ecollege
Measureup through ecollege
These were free for me and helped me to gain an understanding. I mainly used Professor Messer’s videos and any concepts I did not understand I used Chatgpt. Github has some free books which I found helpful. Ecollege helped with providing resources but I found their questions to be repetitive and I learned the answer off instead of learning why the answer was correct.
There are other resources that are highly praised for helping to pass Security+.
Free
Professor Messer Youtube
CompTIA official exam objectives
Reddit - r/CompTIA
ExamCram Quizlit
OSINT Resources like Tryhackme or OverTheWire
Paid
Jason Dion’s Security+ course on Udemy
MeasureUP
CompTIA official practice test
CompTIA CertMaster learn + labs
Mike Meyers’ Total Tester and Total Seminars Course
Professor Messer
There are free videos on his YouTube channel which go through every single part of the exam, as well as monthly study sessions.
On his website there are paid courses, practice exams and books by him that can help people if the videos are not enough
I found this to be easy to follow
Clear explanations
Real world examples
Many people passed the exam with just this resource
CompTIA Official Exam Objectives
Free
Official blueprints of what is on the exam (a good starting place)
I used it to track my progress and to make sure I was not missing parts
r/CompTIA
Free
People give real experiences, their study plan, what they wish they did differently
Sharing resources (often free)
Success stories to help with your own motivation
ExamCram Practice Questions
This is on quizlet
Flashcards and definitions based on key topics
Helps to reinforce memorisation of terms and acronyms
Can be useful for quick review sessions
Open Source Intelligence (OSINT) Resources
TryHackMe, OverTheWire
Can be free
Good for practicing basic linux, networking and security labs
Helpful if you learn better by doing
Can align with practical concepts covered in Security+
Jason Dion’s Youtube
Sample video from course
Excellent explanation for trickier topics like access control, cryptography etc
Jason Dion Security+ Course on Udemy
Costs about €15–€20 (during sales), outside of sale the whole bootcamp is about €100 euro
A lot of real world examples
Practice questions, quizzes, and downloadable slides
Especially helpful for learners who need structure
MeasureUp or CompTIA Official Practice Tests
costs about €80 - €100
Closest to the real exam in terms of difficulty and format
Can help with timing and identifying weak spots
Strong indicator of exam readiness
Mike Meyers’ Total Tester and Total Seminars Course
costs €15 - €20
Engaging delivery
Covers the concepts in beginner friendly way
Comes with practice questions (1 set)
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Written by

Roisin Gleeson
Roisin Gleeson
Hi, I’m Roisin, and this is my journey into cybersecurity. With a background in adult education, I’ve always enjoyed problem-solving and hands-on learning. Now, I’m applying that mindset to cybersecurity, where I’m exploring everything from ethical hacking to Python scripting. I’m currently working on my CompTIA Security+ certification, with plans to dive into CySA+ and PenTest+. I’m also learning Linux and building a portfolio of security projects to develop my skills. This blog is where I document my progress, challenges, and lessons learned—whether it’s breaking down security concepts, sharing Python scripts, or writing about real-world security issues. Follow along as I grow from learner to cybersecurity professional—one step at a time.