Curriculum and certification compared. A direct breakdown of what each belt level teaches, how accreditation works, recertification rules, and pricing.
You have narrowed your search to two platforms. Both teach Lean Six Sigma online, both are self-paced, and both claim to be the smarter choice. But the differences between SimplicityHub and GoLeanSixSigma (GLSS) are significant — and they matter depending on what you actually want from a certification.
This article compares the two platforms directly on the things that count: what each belt course actually teaches, how the certifications are accredited and recognised, what recertification looks like, and what you pay. No filler. Just the specifics.
The short version: SimplicityHub offers deeper curriculum at each belt level, CSSC accreditation with no expiry requirement, lifetime access, and a flat £25 per belt. GLSS is a US-based platform with a broader brand presence, a faster course format, and a proprietary certification that requires renewal every two years.
Here is the full breakdown.
Before diving into the curriculum detail, it helps to understand what each platform is built for.
SimplicityHub is a UK-based training provider, accredited by the Council for Six Sigma Certification (CSSC). It was built by a Master Black Belt practitioner with over a decade of hands-on project experience. The course content is authored at MBB level and designed for practitioners who want to apply the methodology to real work, not just pass an exam. Every belt course includes the exam and certificate at a flat price, with no subscription required and no expiry on the qualification. The platform also provides over 80 free templates and 25 free calculators alongside its courses.
GoLeanSixSigma (GLSS) is a US-based platform that has built a large community of learners, particularly in North America. It operates on a subscription model, holds PMI Authorised Training Partner (ATP) status, and issues its own branded GLSS certification. Its courses are optimised for speed — the Green Belt, for example, is designed to be completed in approximately four hours. GLSS certifications require recertification every two years, either by retaking the course or submitting a project through their Kure platform.
| **SimplicityHub** | **GoLeanSixSigma (GLSS)** | |
|---|---|---|
| Based | UK | USA |
| Accreditation body | CSSC | Proprietary GLSS cert + PMI ATP |
| Certification expiry | None | Every 2 years |
| Access model | Lifetime, no subscription | Subscription required for all-course access |
| Content author | Master Black Belt | Team-created |
| Free resources | 80+ templates, 25+ calculators | Limited free content |
| AI tools | Inline AI Coach on every lesson | Optional Kure add-on |
This is where the two platforms diverge most clearly. GLSS takes a speed-first approach — courses are designed to be completed quickly, with a streamlined structure that prioritises accessibility. SimplicityHub takes a depth-first approach, with more modules, more statistical content, and a guided mini-project built into the higher belts.
SimplicityHub Yellow Belt covers the foundational DMAIC toolkit: project charters, SIPOC diagrams, the 8 Wastes, basic process mapping, root cause analysis tools (5 Whys, Fishbone), Pareto charts, and an introduction to control charts. Learners complete the course in 2 to 3 weeks at a self-paced rate. The exam is 50 questions with a 70% pass mark.
GLSS Yellow Belt is designed to be completed in approximately two hours. It covers Lean Six Sigma roles, variation, costs, a project screener, and a brief overview of DMAIC phases. It is explicitly positioned as an introduction rather than a practitioner-level qualification. The exam is 40 multiple choice questions.
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This is the level where the curriculum gap becomes most visible.
SimplicityHub Green Belt spans 6 modules across an estimated 4 to 6 weeks of study. The content covers:
The exam is 65 questions. Learners also complete a guided mini-project, applying the full DMAIC toolkit to a real scenario with AI Coach feedback at each stage.
GLSS Green Belt is designed to be completed in approximately four hours across six modules. The modules follow the DMAIC structure and introduce tools including swimlane maps, spaghetti maps, run charts, histograms, box plots, Pareto charts, Fishbone diagrams, and a monitoring and response plan. The exam is 80 multiple choice questions. An optional project coaching add-on is available at additional cost.
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SimplicityHub Black Belt spans 18 modules across an estimated 8 to 12 weeks. The content extends into:
The final exam is 75 questions. A mini-project is submitted and reviewed by a qualified Master Black Belt with written feedback.
GLSS Black Belt is designed to be completed in approximately eight hours. The exam is 120 multiple choice questions. Optional 1-on-1 coaching with a Master Black Belt is available at additional cost.
Certification recognition is the question most people ask second, right after price. Here is what you actually need to know.
SimplicityHub is an accredited training provider for the Council for Six Sigma Certification (CSSC). The CSSC is one of three main accreditation bodies for Lean Six Sigma, alongside ASQ (American Society for Quality) and IASSC (International Association for Six Sigma Certification).
A few things distinguish CSSC from the alternatives:
SimplicityHub certifications have no expiry date. Once you pass, your qualification stands. Certificates are LinkedIn-ready and map to the standard White, Yellow, Green, and Black Belt levels that UK employers recognise.
GLSS issues its own branded certification. It is not backed by CSSC, IASSC, or ASQ. The platform also holds PMI Authorised Training Partner (ATP) status, which means its courses qualify for Professional Development Units (PDUs) — 2 PDUs for Yellow Belt, 4 for Green Belt, 8 for Black Belt. This is relevant if you hold a PMP or other PMI credential and need to maintain it.
The recertification requirement is the most important practical difference. GLSS certifications expire every two years. To renew, you must either retake the course (which requires an active subscription) or submit a project through Kure. If your subscription lapses, you lose access to the course material needed to recertify.
Both CSSC and GLSS certifications are widely accepted by employers in operational and quality roles. UK employers do not typically specify a certification body — they look for the belt level and the evidence of applied skills. The methodology itself (DMAIC, process capability, hypothesis testing) is the same regardless of provider.
The practical differentiator for UK learners is that CSSC is the accreditation body SimplicityHub has chosen, and it is listed on the CSSC's official provider directory. For roles in UK manufacturing, healthcare, financial services, and the public sector, a CSSC-accredited qualification from a listed provider carries clear institutional backing.
This is the most straightforward comparison in the article.
| Belt Level | SimplicityHub | GoLeanSixSigma (GLSS) |
|---|---|---|
| White Belt | Free | Free |
| Yellow Belt | £25 | $99 (~£79) |
| Green Belt | £25 | $599 (~£472) |
| Black Belt | £25 | $999 (~£787) |
| All belts (bundle) | £75 | $499/year subscription (~£394) |
| Exam retakes | Unlimited, no charge | Included |
| Recertification | Not required | Required every 2 years |
| Subscription required | No | Yes (to maintain all-course access) |
*GLSS prices shown in USD. GBP equivalents are approximate based on current exchange rates.*
The pricing gap at Green Belt level is significant. SimplicityHub's Green Belt is £25 for the full course, exam, and certificate with lifetime access. GLSS's Green Belt is $599 (approximately £472) for one year of access, with recertification required after two years.
Over a five-year period, a GLSS Green Belt holder who stays current will spend approximately $599 on the initial course plus two recertification cycles — potentially totalling over $1,000 depending on the renewal method chosen. A SimplicityHub Green Belt holder spends £25. Once.
One caveat worth noting: GLSS's annual subscription at $299.40 (with their discount code) gives access to all belt levels simultaneously. If you plan to complete Yellow, Green, and Black Belt in quick succession, the maths shift slightly. But the subscription still expires, and recertification is still required.
SimplicityHub courses are also listed on Reed.co.uk — the UK's largest job site course marketplace — which adds an additional layer of visibility and credibility for UK-based learners.
Certification is only part of the picture. What you can actually use alongside your training is often what determines whether the learning sticks.
SimplicityHub is structured as a practitioner platform, not just a course provider. Alongside the belt courses, every learner has access to:
The templates and calculators are free to use whether or not you are enrolled in a paid course. This is a meaningful difference for teams using SimplicityHub to upskill multiple people: the toolkit is available to everyone from day one.
GLSS's primary practical tool is Kure — a project management and statistical analysis platform. Kure is an optional add-on, not included in the base course price. It is positioned as the tool for completing GLSS projects and for the recertification pathway.
For learners who want statistical software built into their training, Kure is available. But it is a separate product with its own pricing, not a bundled resource.
Both platforms are fully online and self-paced. The key structural difference is time commitment.
| **SimplicityHub** | **GLSS** | |
|---|---|---|
| Green Belt duration | 4-6 weeks (5-6 hrs/week) | ~4 hours total |
| Black Belt duration | 8-12 weeks (6-8 hrs/week) | ~8 hours total |
| Mini-project | Guided (Green Belt), MBB-reviewed (Black Belt) | Optional, via Kure |
| Exam retakes | Unlimited, no charge | Included |
The time difference is not a flaw in either platform — it reflects a deliberate design choice. GLSS is built for speed and accessibility. SimplicityHub is built for depth and application. Which matters more depends on your goal.
If you need a credential quickly for a job application or internal programme, GLSS's faster format has obvious appeal. If you need to actually run a DMAIC project at work and want the statistical foundation to do it properly, the curriculum depth in SimplicityHub's courses is the more relevant factor.
Neither platform is the right answer for every learner. Here is a direct guide.
For organisations training multiple people, SimplicityHub's pricing structure is particularly straightforward. There are no per-seat subscription fees, no renewal costs, and the full template and calculator library is free to use across the team. Group rates are available for five or more learners. For a team of ten people completing Green Belt, the total cost at SimplicityHub is £250. The equivalent at GLSS, using their annual subscription, would be substantially higher — and would require renewal.
If you are building an internal improvement capability in a UK organisation, the economics of the CSSC-accredited, lifetime-access model are difficult to argue against.
Both platforms teach the same methodology. DMAIC is DMAIC. The tools are the tools. What differs is how much of the methodology you actually learn, what your certification costs over time, and what happens to your qualification in two years.
SimplicityHub's Green Belt covers hypothesis testing, regression, DOE, FMEA, advanced control charts, and project financials — topics that are absent or surface-level in GLSS's four-hour equivalent. The Black Belt extends further into time series analysis, Monte Carlo simulation, and strategic deployment. The CSSC accreditation is backed by a recognised international body with over a decade of history. The certification does not expire.
GLSS has a larger US-based community, PMI ATP status for PDU earners, and a faster course format that suits people who need a credential quickly.
For UK practitioners who want to lead real projects, build a durable qualification, and not pay hundreds of pounds for a certification that expires in two years, the choice is straightforward.
Start with SimplicityHub's free White Belt — no card required, no commitment. Or go straight to Green Belt certification for £25, which includes the full course, the exam, and a CSSC-accredited certificate with lifetime access.
For more on what each belt level teaches and how to choose the right starting point, see What Each Lean Six Sigma Belt Level Covers and Is Lean Six Sigma Worth It in 2026?
Yes. GLSS certifications expire every two years. To renew, you must either retake the course (which requires an active subscription) or submit a project through their Kure platform. If your subscription lapses, you lose access to the materials needed to recertify.
SimplicityHub is UK-based and accredited by CSSC, with no expiry on certifications and lifetime access. GLSS is US-based with a proprietary certification that requires renewal. For UK practitioners who want a durable qualification without ongoing costs, SimplicityHub is the stronger choice.
SimplicityHub charges £25 per belt with lifetime access and no subscription. GoLeanSixSigma charges $599 for Green Belt (~£472) and $999 for Black Belt (~£787), plus an ongoing subscription for all-course access and recertification every two years.
SimplicityHub's Green Belt covers hypothesis testing, regression, DOE, FMEA, and project financials across 4-6 weeks. GLSS's Green Belt is designed for completion in approximately four hours and does not cover these topics at the same depth.
No. SimplicityHub certifications never expire. Once you pass, your qualification stands permanently with no renewal fees, no subscription requirements, and lifetime access to all course materials.
CSSC-accredited, lifetime access, no subscription. Start free with White Belt or go straight to Green Belt for £25.