The short answer: the strongest alternatives to the Center for Development of Security Excellence (CDSE) are KnowBe4 and Skillcast for corporate security awareness, Immersive Labs and Hack The Box for hands on technical training, CompTIA and ISACA certification tracks for industry recognized credentials, and LMS platforms like Canvas, Blackboard, or iSpring if you need to host and manage your own training content. CDSE itself remains the authoritative source for DoD policy, insider threat, and industrial security training, so most organizations end up pairing CDSE with one of these alternatives rather than replacing it outright.
I get calls about this pretty regularly from security managers at Fortune 500 companies, defense subcontractors, and cleared professionals looking to move their careers forward. CDSE does its specific job well, but it was built for a government audience and stops short in several places that matter. Below is the real breakdown of which alternatives fit which gap, and how to build a training stack that actually covers what your workforce needs.
CDSE serves over two million learners annually and hosts more than 500 free courses through its STEPP system. It is excellent at what it does. It is also not trying to compete with commercial training platforms, which is why organizations need to know what fills the gaps.
What Is CDSE and Who Is It Built For?
CDSE is the training arm of the Defense Counterintelligence and Security Agency (DCSA). It delivers free security training to DoD personnel, federal employees, and cleared contractor staff through the STEPP learning management system. The course library covers counterintelligence, insider threat, industrial security, physical security, personnel security, cybersecurity awareness, and special access program (SAP) training.
Anyone can register for STEPP, but the content assumes a government or cleared contractor context. CDSE courses reference DoD manuals, the NISPOM, and federal policy frameworks. They issue completion certificates, not industry recognized credentials. They are self paced, video and slide based, with no live instruction and limited hands on components. That design is right for the mission CDSE was given, and wrong for a lot of other training needs.
CDSE Alternatives Compared at a Glance
Before we get into the details, here is how the major CDSE alternatives stack up by use case, audience, and cost. Different platforms fill different gaps, so the right pick depends on what you are actually trying to solve.
| Platform | Best For | Audience | Cost Model |
|---|---|---|---|
| CDSE | DoD policy, insider threat, industrial security | Federal and cleared contractor | Free |
| KnowBe4 | Phishing simulations and workforce awareness | Commercial, all sizes | Per user subscription |
| Skillcast | Corporate compliance and GDPR training | Commercial, UK and EU focused | Per user subscription |
| Immersive Labs | Cyber readiness exercises and team drills | Enterprise security teams | Enterprise subscription |
| Hack The Box | Hands on offensive and defensive practice | Individuals and security teams | Free tier plus paid subscription |
| CompTIA, ISACA, ISC2 | Industry credentials for DoD 8140 and career growth | Individual professionals | Exam fees and training |
| Canvas, Blackboard, iSpring | Hosting your own training content | Academic and corporate | License or subscription |
Best Alternatives to CDSE for Corporate Security Awareness
This is the category I get asked about most often. A company outgrows the point where CDSE awareness modules make sense for its general workforce, and it needs a commercial tool that handles phishing simulations, role based training, and regulatory requirements like HIPAA or PCI DSS. CDSE does not play in this space because its audience is the federal workforce.
KnowBe4 is the most common landing point. It serves over 65,000 organizations and is built around phishing simulations, a large library of short awareness videos, and detailed reporting that documents behavior change over time. If your goal is to reduce click rates on phishing tests and prove to an auditor that you ran the program, KnowBe4 is a reasonable first call.
Skillcast leans harder into corporate compliance. It carries over 400 e-learning courses covering GDPR, anti bribery, money laundering prevention, and data protection, which makes it a stronger fit for companies with European operations or strict regulatory documentation needs. Immersive Labs takes a different angle entirely, focusing on scenario based cyber readiness exercises for security and IT teams rather than awareness videos for the general workforce. It is less “click through a training” and more “run your team through a simulated incident.”
One thing I tell every security manager who asks about these tools: the platform matters less than the program around it. A KnowBe4 deployment with no leadership support and no follow through is worse than a well run awareness program built on free CDSE content. Jeff Porch has written a solid piece on building a human firewall that covers program design rather than tool selection, which is where most organizations actually go wrong.
Best Alternatives to CDSE for Hands On Technical Skills
CDSE offers some technical content, but it is not where you go to learn how to actually exploit a system, defend a network, or triage a malware sample. For hands on skill building, two platforms dominate the conversation.
Hack The Box is the one I hear about most from working security professionals. It offers realistic “boxes” (intentionally vulnerable virtual machines) that require independent research and exploitation, which tracks closely to what real attackers and defenders actually deal with. The platform runs a free tier with a subscription option for more advanced content, and it has become standard practice for people preparing for penetration testing roles. Immersive Labs, mentioned above, also fits here when the goal is team level readiness rather than individual skill building.
These platforms do not replace CDSE’s policy and compliance coverage, and they do not prepare you for a specific certification exam. They fill the gap between knowing what a concept is and being able to execute on it. If your team handles incident response, forensics, or vulnerability testing, they need hands on practice that CDSE is not designed to provide.
Best Alternatives to CDSE for Industry Recognized Certifications
This is the gap CDSE was never meant to fill, but it is the one people feel most acutely. A CDSE completion certificate is fine for internal compliance records. It will not help a cleared IT professional move from a help desk role into a security role, and it will not satisfy DoD 8140 baseline requirements for positions that require a specific industry certification.
For anyone in or adjacent to a government role, the certifications that actually show up on job requisitions and contract vehicles come from three issuers. CompTIA handles the foundational and mid tier technical credentials: Security+, CySA+, CASP+, and the new SecAI+ for AI security. ISC2 owns the senior technical and management layer through CISSP and its concentrations. ISACA covers the governance, risk, audit, and management space with CISA, CISM, CRISC, and the newer AI focused credentials AAISM and AAIR. If you are trying to work out which credential is right for the government side specifically, I wrote a piece on what cybersecurity certifications government contractors actually require that walks through how 8140 works in practice and which certs hit the baseline.
These are not CDSE replacements. They are the credentials that CDSE trained professionals typically pursue once they want to grow beyond their current role or move between contracts.
Practical tip: If you are in a cleared role and trying to decide where to spend your own time and money, stack CDSE coursework with one industry certification per year. Use CDSE for the free policy and compliance refreshers your position requires, then put your development budget toward a credential that travels with you. That combination has the best career ROI I have seen in this space.
Best Learning Management Systems if You Host Your Own Training
Some organizations do not actually need a CDSE replacement for content. They need an LMS to host their own training materials, track completions, and report on compliance. That is a platform problem, not a content problem.
Canvas and Blackboard Learn both have strong footholds in academic environments and increasingly in corporate settings where training involves live instruction. iSpring Learn is the one that comes up most often when organizations want a lighter corporate LMS with built in authoring tools for their own subject matter experts. None of these ship with cybersecurity content. They give you the plumbing to deliver content you already own or have licensed from somewhere else.
Smaller organizations almost always come out ahead subscribing to a packaged awareness platform instead of standing up their own LMS. Larger organizations with specific role based training that nobody else covers end up needing the LMS approach, usually alongside one of the awareness platforms already discussed.
When CDSE Is Still the Right Answer
Here is something worth being clear about, because too many articles on this topic treat CDSE like a weakness you need to get past. CDSE is excellent at what it does. For derivative classification training, insider threat awareness for cleared personnel, SAP training, OPSEC fundamentals, and FSO coursework, CDSE is the authoritative source. No commercial platform is going to replicate that content or carry the same weight with DoD stakeholders.
If you are a Facility Security Officer (FSO), a program security officer, or anyone whose job requires demonstrating knowledge of DoDM 5200.01, the NISPOM, or 32 CFR Part 117, do not go looking for alternatives. Use CDSE, document the completions, and supplement with other training for skills CDSE does not cover. I have watched companies spend real money on commercial training that their government customer then refused to accept because it was not CDSE. Save yourself that conversation.
The right mental model for CDSE is that it is a foundation, not a ceiling. It handles the compliance layer. Everything above that layer (technical depth, industry credentials, awareness for the non cleared workforce, hands on practice) is where other platforms earn their place. You do not replace CDSE. You build on top of it.
Frequently Asked Questions About CDSE Alternatives
What is the best alternative to CDSE for private sector companies?
For private sector security awareness at scale, KnowBe4 is the most common choice because it handles phishing simulations, awareness videos, and reporting in one platform. For compliance heavy industries with European operations, Skillcast is often a better fit. Neither offers the DoD specific policy content that CDSE does.
Can I use CDSE training if I do not work for the government?
Yes. CDSE courses are free and open to anyone who registers for a STEPP account. That said, most courses assume a government or cleared contractor context and reference federal policy, so the content is most useful if your work touches the defense or federal space in some way.
Does CDSE offer industry recognized certifications?
No. CDSE issues course completion certificates and some credential programs for security professionals in federal roles, but these are not industry certifications on the level of CompTIA Security+, CISSP, or the ISACA credentials. For DoD 8140 baseline requirements or commercial job market credibility, you need one of those industry certs.
What platform is similar to CDSE for hands on cybersecurity skills?
Hack The Box is the most widely used platform for hands on offensive and defensive practice. Immersive Labs works well for team level cyber readiness drills. Neither maps to CDSE’s policy or compliance content, but they cover the technical practice gap CDSE does not.
Is KnowBe4 a good replacement for CDSE?
For general workforce security awareness and phishing training, yes. For DoD specific training like derivative classification, insider threat for cleared personnel, or NISPOM compliance, no. KnowBe4 is built for commercial awareness programs, not federal policy requirements, so cleared organizations usually run both.
What is the difference between CDSE and commercial cybersecurity training platforms?
CDSE is free, government run, and built around DoD and federal security policy. Commercial platforms charge subscription fees, serve a broader audience, and focus on areas CDSE does not cover deeply, including phishing simulations, hands on technical labs, and industry certification prep. Most cleared organizations use CDSE for compliance training and a commercial platform for everything else.
Do CDSE courses count toward DoD 8140 certification requirements?
No. DoD 8140 requires specific industry certifications (CompTIA Security+, CISSP, CISM, and others) for defined work roles. CDSE training supports role performance and policy understanding, but it does not satisfy the 8140 certification baseline on its own.