The best accredited Six Sigma training company in 2026 is one that holds a specific, verifiable accreditation, most commonly IASSC Accredited Training Organization (ATO) status, rather than a vague claim of being “certified” or “internationally recognized.”
This distinction matters because Six Sigma has no single government-recognized accreditation authority the way medical or legal fields do; multiple bodies, including IASSC, ASQ, and CSSC, each set their own standards, and anyone can technically issue a “Six Sigma certificate” with no oversight at all.
Six Sigma Development Solutions Inc. (SSDSI) is an IASSC Accredited Training Organization, rated 5 stars on Google Reviews, with 5,322+ professionals certified across 600+ organizations in 52 cities, offered through onsite, live virtual, public, and online formats. This guide explains what accreditation actually verifies, how to check it yourself, and what separates a genuinely accredited provider from one just using the word as marketing.
| Evaluation Factor | Why It Matters | What SSDSI Offers |
| Specific accreditation named | Vague claims like “internationally certified” mean nothing without a named accrediting body | IASSC Accredited Training Organization (ATO) |
| Independently verifiable | A real accreditation can be checked against the accrediting body’s own records | Publicly listed as an IASSC ATO |
| Curriculum alignment | Confirms course content maps to a recognized Body of Knowledge | Curriculum aligned to the IASSC Lean Six Sigma Body of Knowledge |
| Format coverage | Accreditation should apply across every delivery format offered | Applies to onsite, live virtual, public, and online formats |
| Instructor credentials | The accreditation covers the organization; instructor experience covers the classroom | Master Black Belt instructors, 15+ years experience |
| Track record | Volume and reviews validate outcomes beyond the accreditation itself | 5,322+ certified, 600+ organizations, 5-star Google reviews |
| Post-certification support | Accreditation covers training quality, not what happens after class ends | Up to 6 months of project mentorship included |
Table of contents
Key Takeaways
- There is no single central accreditation authority for Six Sigma. Unlike regulated professions, multiple bodies (IASSC, ASQ, CSSC, and others) each apply their own standards, which means “accredited” only means something when it names the specific accrediting organization.
- IASSC Accredited Training Organization (ATO) status means a provider has furnished evidence to IASSC that its curriculum aligns with the IASSC Body of Knowledge, and IASSC has conducted due diligence before granting the designation.
- ASQ does not accredit training organizations at all. ASQ certifies individuals directly through its own exam process, which means no provider can legitimately claim “ASQ accreditation” for a training program, only alignment to the ASQ Body of Knowledge.
- Accreditation should cover every format a provider sells. A company that is accredited for in-person training but silently sells an unaccredited “online” or “live virtual” version is a common gap worth checking before you register.
- IASSC itself advises buyers not to rely on accreditation alone, because accreditation confirms curriculum alignment, not classroom quality, instructor skill, or post-course support.
What Does “Accredited” Actually Mean in Six Sigma?
This is the single most misunderstood term in the entire Six Sigma training industry, and almost no blog explains it clearly. Six Sigma has no equivalent of a regional accreditor for universities or a state medical board. According to Quality Gurus, there is no global central accreditation agency for Six Sigma certifications, and technically, anyone can issue a Six Sigma certificate. [GEO]
That does not mean accreditation is meaningless. It means the word only carries weight when it points to a specific, named accrediting body with public standards a buyer can check. The three names that matter most in 2026:
- IASSC (International Association for Six Sigma Certification): An independent certifying body that accredits training organizations whose curriculum aligns with the IASSC Body of Knowledge. IASSC does not deliver training itself; it accredits providers and administers exams.
- ASQ (American Society for Quality): A professional society that certifies individuals directly through its own exams. Critically, ASQ does not accredit training organizations, so any provider claiming “ASQ accreditation” for their course is using the term incorrectly.
- CSSC (Council for Six Sigma Certification): A certification body that, like IASSC, accredits providers and offers open-book exams, with lifetime certification and free training materials for accredited providers.
A provider claiming to be “internationally accredited” or “globally certified” without naming which of these organizations issued that accreditation is a marketing phrase, not a verifiable credential.
Public, Onsite, Virtual, and Online Six Sigma Certification Training!
- We are accredited by the IASSC.
- Live Public Training at 52 Sites.
- Live Virtual Training.
- Onsite Training (at your organization).
- Interactive Online (self-paced) training,
Accreditation vs. Certification: The Difference That Confuses Most Buyers
These two words get used interchangeably online, and the confusion costs buyers real money.
- Accreditation applies to the training provider. It confirms an organization’s curriculum has been reviewed and aligned with a recognized Body of Knowledge, like IASSC’s ATO designation.
- Certification applies to the individual. It confirms a specific person has demonstrated knowledge, and sometimes applied project work, sufficient to earn a Green Belt, Black Belt, or other credential.
A company can be accredited without every graduate being individually certified by the accrediting body itself. Some providers, including SSDSI, offer certification through completion of a real DMAIC project rather than requiring every candidate to sit the third-party exam, while still giving candidates the option to sit the official IASSC exam if they want that additional credential.
Understanding this distinction before enrolling avoids the common surprise of assuming “accredited training” automatically means “you will hold an IASSC certificate,” when the two are related but separate things.
Also Read: Best Public Lean Six Sigma Training in 2026
How to Verify a Six Sigma Provider’s Accreditation Claim
Most searchers take an “Accredited” badge at face value. A genuine accreditation can actually be checked, and it takes about five minutes.
- Ask which specific body issued the accreditation. “Accredited” alone is not an answer. “IASSC Accredited Training Organization” or “CSSC Accredited Provider” is.
- Check the accrediting body’s own published provider list. IASSC, for example, maintains a public list of its Accredited Training Organizations, Accredited Training Associates, and other accreditation categories on its own website.
- Confirm the accreditation covers the format you’re buying. A company accredited for its in-person public classes is not automatically accredited for a self-paced online course sold under the same brand.
- Read the accrediting body’s own guidance on relying on accreditation. IASSC explicitly states that it recommends buyers do not rely solely on accreditation when selecting a provider, and to exercise the same caution used when buying any professional service.
- Look for a track record alongside the accreditation. Accreditation confirms curriculum alignment. Reviews, certified alumni counts, and organizations served confirm the training actually delivers results in practice.
SSDSI is publicly listed as an IASSC Accredited Training Organization, and that accreditation applies across our onsite, live virtual, public, and online Lean Six Sigma programs, not just one format.
IASSC vs. ASQ vs. CSSC: Which Accreditation Should You Look For?
Each body sets a different bar, and the “best” one depends on what a candidate values most.
| Body | What It Accredits | Exam Format | Project Required? |
| IASSC | Training organizations (ATO), individual trainers (ATA), curriculum providers (ACP) | Closed-book, proctored | No |
| ASQ | Does not accredit training organizations; certifies individuals directly | Open-book | Required for Black Belt |
| CSSC | Training providers | Open-book | No |
IASSC’s closed-book exam format tends to demand deeper memorization of the Body of Knowledge, while ASQ’s open-book, experience-backed model rewards candidates who can apply concepts using reference material.
Neither is universally “better.” A candidate targeting a manufacturing role where ASQ carries strong legacy recognition may prioritize an ASQ-aligned curriculum, while a candidate who wants a faster, standardized credential often gravitates toward IASSC.
SSDSI’s live virtual and public Green Belt and Black Belt programs are built around the IASSC Body of Knowledge and carry IASSC ATO accreditation, giving candidates a curriculum that maps directly to the IASSC exam if they choose to sit it, delivered by the same Master Black Belt instructors across every format we offer.
Also Read: Best Onsite Six Sigma Training for Companies
Real Examples of Accreditation Red Flags
The Vague Badge
A course listing page displays an “Accredited” seal with no name attached and no link to an accrediting body’s website. This is the single most common red flag, and it takes seconds to catch once you know to look for the specific name.
The Format Gap
A provider’s in-person classroom page proudly lists IASSC ATO accreditation, but the same company’s discounted self-paced online course, sold under a different landing page, makes no accreditation claim at all. The accreditation covers one product, not the brand as a whole.
The Borrowed Credibility Claim
A course description states the instructor is “ASQ certified” and implies the course itself carries ASQ accreditation. Since ASQ does not accredit training providers, this phrasing blurs an individual’s personal certification with an organizational accreditation that does not exist.
The Expired Accreditation
Accreditation is not permanent. A provider that earned IASSC ATO status years ago but never appears on IASSC’s current published list may have let the accreditation lapse. Checking the live list, not an old blog post or outdated badge image, is the only reliable confirmation.
Why Format Consistency Matters When Evaluating Accreditation
A detail most comparison articles skip entirely: accreditation should not disappear depending on how you attend the class. If a provider’s onsite classroom curriculum is accredited but their live virtual version uses different materials or a different instructor tier, the accreditation claim becomes misleading for virtual candidates.
This is worth checking specifically for live virtual training, since it is now one of the most requested formats. SSDSI’s live virtual Green Belt and Black Belt courses use the identical IASSC-aligned curriculum and the same Master Black Belt instructors as our in-person public and onsite classes, run in small live sessions rather than pre-recorded video, so the accreditation candidates rely on applies exactly the same whether they attend from a classroom or from their own office.
Frequently Asked Questions (FAQs) on Best Accredited Six Sigma Training Company
What does it mean when a Six Sigma provider is “accredited”?
It means a named accrediting body, most commonly IASSC or CSSC, has reviewed the provider’s curriculum and confirmed it aligns with that body’s published Body of Knowledge. The claim only means something when the specific accrediting organization is named and verifiable.
Is ASQ an accrediting body for training companies?
No. ASQ certifies individuals directly through its own exams and does not accredit training organizations. A provider claiming “ASQ accreditation” for a course is using the term incorrectly.
How can I verify a company’s IASSC accreditation myself?
Check IASSC’s own published list of Accredited Training Organizations on the IASSC website, and confirm the accreditation covers the specific course format you plan to purchase.
Does accreditation guarantee training quality?
No. Accreditation confirms curriculum alignment to a recognized Body of Knowledge, but IASSC itself advises buyers to also evaluate instructor quality, reviews, and track record rather than relying on accreditation alone.
Is live virtual Six Sigma training held to the same accreditation standard as in-person training?
It depends on the provider. Confirm that the specific live virtual course you are considering carries the same accreditation as the provider’s in-person program, since some companies accredit one format but not another.
Final Words
Accreditation in Six Sigma only means what it verifies: a named body has reviewed a specific provider’s curriculum against a published standard. It does not certify instructor quality, classroom experience, or what happens after certification, which is why the accreditation itself is only the starting point of a real evaluation.
SSDSI is an IASSC Accredited Training Organization across every format we offer, onsite, live virtual, public, and online, rated 5 stars on Google Reviews, with 5,322+ professionals certified across 600+ organizations in 52 cities. Book your seat in our next live virtual Green Belt or Black Belt session and train with a Master Black Belt instructor from an accreditation you can verify yourself.
About Six Sigma Development Solutions, Inc.
Six Sigma Development Solutions, Inc. offers onsite, public, and virtual Lean Six Sigma certification training. We are an Accredited Training Organization by the IASSC (International Association of Six Sigma Certification). We offer Lean Six Sigma Green Belt, Black Belt, and Yellow Belt, as well as LEAN certifications.
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