Certsqill vs Jason Dion: Which is Better for CompTIA and Security Cert Prep in 2026?

Overview

Jason Dion is a former Naval officer turned cybersecurity instructor with a massive presence on Udemy. His certification courses — CompTIA Security+, CySA+, PenTest+, CASP+, Network+, and more — consistently rank among Udemy's best-sellers and have been purchased by millions of candidates. His teaching style is practical and military-precise: structured, example-rich, and focused on passing the exam.

Dion Training bundles video courses with practice exams, often available on Udemy for $15–$20 during sales. This bundle pricing is hard to beat on raw cost. The limitation is the same as other static practice platforms: no AI explanations, no adaptive routing, and a finite question bank that you exhaust relatively quickly when drilling weak areas.

Comparison Table

Practice Test Quality and Volume

Jason Dion's practice exams are legitimately good — scenario-based, aligned to current exam objectives, and at the right difficulty level. His Security+ practice tests in particular are highly regarded on Reddit and YouTube as representative of actual exam difficulty. If you are looking for a static practice test that teaches you how hard the real exam is, Dion's practice tests deliver that.

The limitation surfaces when you finish them. Dion's practice exam bundles typically include 5–6 practice tests of 90 questions each. Once you have answered all 450–540 questions, there are no new questions — you are reviewing questions you have already seen, which reduces their diagnostic value. Certsqill's adaptive library continuously routes you to questions testing the specific sub-domains where you are weakest, and the AI explains each wrong answer in context rather than providing static rationale text.

AI Features

Dion Training practice tests provide per-question rationale text — typically 2–4 sentences explaining the correct answer and briefly addressing distractors. These rationales are accurate but static. If the explanation does not make sense, there is no follow-up mechanism.

Certsqill's AI tutor treats each question as a conversation. For PBQ-style questions that require multi-step security analysis — for example, identifying the right SIEM alert response workflow or choosing between penetration testing methodologies — you can ask the AI to walk through the reasoning step by step, request a simplified analogy, or explore an adjacent concept. This interactive layer accelerates learning on complex topics significantly faster than re-reading static rationale text.

Bundle Value vs. Adaptive Value

Dion Training's Udemy bundles frequently go on sale for $13–$20 and include a full video course plus practice tests in a single purchase. For candidates who do not have separate video course access and want the most affordable single-purchase option, this is genuinely hard to beat.

Certsqill's value case is different: adaptive routing means you spend practice time on your actual weaknesses rather than reviewing material you already know. For candidates who understand the concepts but have uneven domain scores, Certsqill's targeted practice is more efficient than working through a static question bank sequentially. The $19/month also covers unlimited certifications — if you are pursuing a multi-cert path, the per-cert cost drops significantly.

Exam Coverage

Jason Dion focuses primarily on CompTIA exams (Security+, CySA+, PenTest+, CASP+, A+, Network+) and some CISSP content. His Udemy library is deep within those domains but does not extend to AWS, Azure, GCP, Kubernetes, or most other enterprise certifications.

Certsqill covers 100+ certifications across all major vendors — cloud, networking, security, DevOps, data, and project management. If your certification path extends beyond CompTIA, Certsqill provides practice continuity without switching platforms or purchasing additional study materials.

Verdict

Jason Dion's Udemy bundles are an excellent starting point — comprehensive, affordable, and accurate. But for candidates who want to maximize first-attempt pass rates, the adaptive AI practice layer that Certsqill provides is a meaningful upgrade over finishing a static question bank. The optimal strategy: use Dion's video course for instruction, then use Certsqill's adaptive practice for the final exam preparation phase.

Frequently Asked Questions