Company lists · Data refreshed September 2026

Top 25 Lean six sigma consulting firms based in the United States

Name: Lean six sigma consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 950 companies tracked

RevenueBase identified 950 lean six sigma consulting firms headquartered in the United States as of September 2026 and tracks 4,505 professional contacts across them, including 1,034 with verified work emails. Atlanta is the largest hub.

This list covers lean six sigma consulting firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

950Companies

4,505Contacts tracked

1,034Verified emails

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The 25 largest lean six sigma consulting firms based in the United States

Ranked by team size

Top 25 of 950 lean six sigma consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to lean six sigma consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Omnex INC	Indirect evidence	Ann Arbor, MI, United StatesHQ checked Sep 28, 2026	501-1,000	216 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
2	Lean SIX Sigma Institute	Strong evidence	Coronado, CA, United StatesHQ checked Sep 28, 2026	51-200	178 contacts →
	Strong evidence “Lean Six Sigma Institute provides comprehensive training and consulting services designed to help organizations navigate the challenges of today’s global marketplace.” Source: RevenueBase Database · checked Sep 28, 2026
3	Lean Focus	Indirect evidence	La Jolla, CA, United StatesHQ checked Sep 28, 2026	51-200	74 contacts →
	Indirect evidence “Every business has the same goal in mind: an increased bottom line.” Source: RevenueBase Database · checked Sep 28, 2026
4	Next Level Partners , LLC	Partial evidence	Naples, FL, United StatesHQ checked Sep 28, 2026	51-200	73 contacts →
	Partial evidence “NEXT LEVEL Partners® is much more than a consulting firm, we’re your partner in creating self-sustaining capability through Business Enterprise Transformation, Knowledge…” Source: RevenueBase Database · checked Sep 28, 2026
5	RCI	Partial evidence	Chattanooga, TN, United StatesHQ checked Sep 28, 2026	n/a	64 contacts →
	Partial evidence “We are a results-driven consulting firm focused on maximizing value and ROI.” Source: RevenueBase Database · checked Sep 28, 2026
6	Lean Enterprise Institute	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	57 contacts →
	Partial evidence “The nonprofit Lean Enterprise Institute (LEI) helps companies and people make things better through lean thinking and practice.” Source: RevenueBase Database · checked Sep 28, 2026
7	PCG Consulting Group International	Partial evidence	Maywood, IL, United StatesHQ checked Sep 28, 2026	201-500	53 contacts →
	Partial evidence “PCG Consulting Group offers preeminent results for B2B clients in Technology, Healthcare, Call Center, Collections, Location Services and Skip tracing sectors.” Source: RevenueBase Database · checked Sep 28, 2026
8	Moresteam	Strong evidence	Powell, OH, United StatesHQ checked Sep 28, 2026	11-50	44 contacts →
	Strong evidence “Get the latest insights on Lean Six Sigma, process modeling, and continuous improvement delivered straight to your inbox.” Source: RevenueBase Database · checked Sep 28, 2026
9	Tormod, A Hargrove Company	Indirect evidence	Mobile, AL, United StatesHQ checked Sep 28, 2026	201-500	41 contacts →
	Indirect evidence “Tormod exists to help manufacturing leaders run great plants.” Source: RevenueBase Database · checked Sep 28, 2026
10	SIX Sigma Management Institute By Dr. Mikel J. Harry	Strong evidence	Scottsdale, AZ, United StatesHQ checked Sep 28, 2026	51-200	39 contacts →
	Strong evidence “Experts in Lean Six Sigma Training, Consulting, and Deployments targeting Breakthrough in Business Transformation, Optimization and Business Terraforming The Dr.” Source: RevenueBase Database · checked Sep 28, 2026
11	The Phoenix Group	Indirect evidence	Springboro, OH, United StatesHQ checked Sep 28, 2026	51-200	36 contacts →
	Indirect evidence “The Phoenix Group Drives Process Improvement and Operational Excellence at Your Organization The Phoenix Group delivers lasting change with organizations we partner with.” Source: RevenueBase Database · checked Sep 28, 2026
12	BMA	Strong evidence	Lexington, KY, United StatesHQ checked Sep 28, 2026	n/a	32 contacts →
	Strong evidence “BMA is the world’s leading lean accounting training and consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
13	Temenos Agility	Strong evidence	Vienna, VA, United StatesHQ checked Sep 28, 2026	11-50	31 contacts →
	Strong evidence “Temenos+Agility is a global consulting firm specializing in Lean-Agile, Enterprise Agility, Change Agent Programs and Leadership Transformation.” Source: RevenueBase Database · checked Sep 28, 2026
14	Kaeppel Consulting, LLC	Partial evidence	San Antonio, TX, United StatesHQ checked Sep 28, 2026	51-200	29 contacts →
	Partial evidence “Different from most large firms, Kaeppel Consulting offers customized solutions to meet your needs without all the overhead.” Source: RevenueBase Database · checked Sep 28, 2026
15	Kaizen Institute United States And Canada	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “Culture is what turns improvement into impact.” Source: RevenueBase Database · checked Sep 28, 2026
16	HKPO	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	28 contacts →
	Strong evidence “HKPO is a Small, Woman-Owned business founded in 2006 with a mission to train and support our clients on how to continuously improve and Change for the Better using Lean Six Sigma…” Source: RevenueBase Database · checked Sep 28, 2026
17	Manufacturers Resource Center MRC	Partial evidence	Allentown, PA, United StatesHQ checked Sep 28, 2026	11-50	27 contacts →
	Partial evidence “MRC provides strategic business consulting assistance and identifies resource options to help manufacturers develop strategies to grow their business.” Source: RevenueBase Database · checked Sep 28, 2026
18	QSG Quality Support Group Excellence In Training & Consulting	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	27 contacts →
	Indirect evidence “VISIT OUR WEBSITE: Quality Support Group Inc.(QSG) has been helping organizations achieve their core objectives since 1993.” Source: RevenueBase Database · checked Sep 28, 2026
19	Knowledgepath	Strong evidence	Birmingham, AL, United StatesHQ checked Sep 28, 2026	51-200	26 contacts →
	Strong evidence “KnowledgePath (now RubinBrown) is a management consulting firm that specializes in lean technology-enabled business transformation.” Source: RevenueBase Database · checked Sep 28, 2026
20	Incito Consulting Group	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	25 contacts →
	Strong evidence “Incito Consulting Group is an award-winning global professional services firm headquartered in San Francisco, CA, with a team that averages over 25 years of excellence in Lean…” Source: RevenueBase Database · checked Sep 28, 2026
21	Gemba Academy	Strong evidence	Keller, TX, United StatesHQ checked Sep 28, 2026	11-50	24 contacts →
	Strong evidence “The world leader in online Lean and Six Sigma training.” Source: RevenueBase Database · checked Sep 28, 2026
22	Transigma	Partial evidence	Shelton, CT, United StatesHQ checked Sep 28, 2026	51-200	24 contacts →
	Partial evidence “At our core, TranSigma is a process-driven consulting firm focused on helping organizations transform their operations to drive growth and achieve their strategic objectives.” Source: RevenueBase Database · checked Sep 28, 2026
23	sixsigma.us	Strong evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	11-50	22 contacts →
	Strong evidence “Six Sigma.us offers online, onsite and open enrollment six sigma training and six sigma certification in Green Belt, Black Belt, Master Black Belt, Champion and Lean Agent…” Source: RevenueBase Database · checked Sep 28, 2026
24	Blehealth	Partial evidence	Pomona, CA, United StatesHQ checked Sep 28, 2026	1-10	22 contacts →
	Partial evidence “We understand the importance of excellent leadership and quality management in today's businesses, and we are here to provide our clients with the best training and consulting…” Source: RevenueBase Database · checked Sep 28, 2026
25	ISSSP	Strong evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1-10	21 contacts →
	Strong evidence “We are the leading non-profit organization promoting the high standards and values that Lean Six Sigma operates by.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: lean six sigma consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names lean six sigma consulting firms.
Partial evidence: Its own public description names part of lean six sigma consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name lean six sigma consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 950 lean six sigma consulting firms based in the United States

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Lean six sigma consulting firms based in the United States at a glance

As of Sep 28, 2026

23.0%Verified-email coverage

4.7Average contacts per company

1-10Median size (employees)

2.9%Largest-city concentration · Atlanta

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

748

11-50

154

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 950 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among lean six sigma consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “lean six sigma consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names lean six sigma consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among lean six sigma consulting firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,034 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Lean six sigma consulting firms by metro

Lean six sigma consulting firms in Atlanta28

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names lean six sigma consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many lean six sigma consulting firms are there based in the United States?

RevenueBase identified 950 lean six sigma consulting firms headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Omnex INC, headquartered in Ann Arbor, tops this list with the largest team on record.

Which city has the most lean six sigma consulting firms?

Atlanta leads with 28 headquartered companies, followed by Houston (18) and Austin (13).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,034 verified decision-maker contacts tracked across these 950 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.