If your goal is a Six Sigma credential that employers will actually recognize, I’d recommend Green Belt rather than Yellow Belt for most professionals.
My top choice: ASQ Certified Six Sigma Green Belt
American Society for Quality (ASQ) is my #1 recommendation, particularly if you’re working in the U.S.
Why:
Strong employer recognition in quality, manufacturing, operations, healthcare, engineering, and process improvement.
The CSSGB certification is lifetime—it doesn't require recertification.
ASQ's self-paced online preparation course is $824 ($724 for members) and gives you 365 days of access.
The actual Green Belt certification exam is currently , or $383 for ASQ members.
The exam is open-book, and ASQ provides an official handbook, question bank, and study materials.
Important catch: ASQ requires 3 years of full-time paid work experience in areas covered by the Green Belt Body of Knowledge. Training/coursework doesn't substitute for that experience.
I'd go with IASSC/PeopleCert Lean Six Sigma Green Belt instead.
IASSC certification has no equivalent three-year experience requirement, and its exam can be taken online from home or an office. iassc.org The current PeopleCert listing shows the Green Belt exam at about $402 in the U.S. listing.
No experience requirement / international portability
⭐⭐⭐⭐½
ASQ Lean Six Sigma e-learning
Learning the methodology thoroughly
⭐⭐⭐⭐⭐
Budget online courses
Learning cheaply, then pursuing a separate exam
⭐⭐⭐
Yellow Belt
Beginners who only need fundamentals
⭐⭐⭐
One important distinction: a course certificate isn't necessarily a professional certification. ASQ explicitly notes that completing its training does not itself mean you've passed the certification exam.
What I'd do in your situation
If you have 3+ years of relevant work experience, I'd choose:
ASQ CSSGB → ASQ online prep → official ASQ exam
If you don't have 3 years yet:
IASSC Green Belt → online training from an accredited provider → IASSC exam
And I wouldn't spend $1,000+ on a university-branded program unless an employer is paying for it. You can get a much more meaningful credential for considerably less.
If you tell me (1) your current job/industry, (2) years of work experience, and (3) your budget, I can narrow this down to the best 2–3 specific online programs for you, including current prices and links.
Unlike many professional fields, Six Sigma doesn't have a single governing monopoly; instead, credibility comes from recognized standards and independent bodies like the American Society for Quality (ASQ), the International Association for Six Sigma Certification (IASSC), or The Council for Six Sigma Certification (CSSC).
The "best" online training program depends entirely on whether you want high corporate prestige, university backing, or budget-friendly flexibility.
Top Online Six Sigma Training Options
American Society for Quality (ASQ)
Best for: Ultimate career prestige and manufacturing/corporate engineering.
Why choose it: ASQ is widely considered the gold standard. Their exams are rigorous and often require proof of real-world project experience (especially for Green and Black Belts).
The catch: They provide training materials, but the training and the proctored exam are separate purchases, and it’s more expensive.
Purdue University Online Lean Six Sigma
Best for: University-backed credibility.
Why choose it: Delivers a top-tier, comprehensive online curriculum deeply integrating Lean principles (waste reduction) with Six Sigma (variation reduction). Excellent name recognition on a resume.
The catch: Higher price point, structured for disciplined, busy professionals.
Simplilearn (Accredited via IASSC/ASQ partners)
Best for: Interactive online bootcamps and applied projects.
Why choose it: They offer robust online blended learning (self-paced options combined with live virtual bootcamps) and include simulated and real-life projects. They are formally aligned with major bodies like IASSC.
The catch: Can feel fast-paced; quality depends heavily on your assigned online instructor during bootcamps.
Coursera (Partnered with universities like Kennesaw State or Tecnológico de Monterrey)
Best for: Flexible, budget-friendly learning.
Why choose it: Great structured specializations that you can complete at your own pace through a monthly subscription.
The catch: A Coursera certificate shows you completed the coursework, but you often still need to sit for a formal proctored exam through an agency like IASSC or CSSC to get an industry-standard independent certification.
How to Choose the Right Path
If your employer is paying/wants maximum resume weight: Go with ASQ or Purdue.
If you need self-paced flexibility on a budget: Look at Coursera combined with an independent IASSC or CSSC exam.
To help narrow down the best fit, tell me:
What is your current industry or role?
Which belt level are you targeting (Yellow, Green, or Black)?
Do you prefer self-paced video modules or live virtual classes?
