Company lists · Data refreshed September 2026

Top 25 Lean consulting firms based in the United States

Name: Lean 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 4, 2026 4,889 companies tracked

RevenueBase identified 4,889 lean consulting firms headquartered in the United States as of September 2026 and tracks 26,702 professional contacts across them, including 7,635 with verified work emails and 10,396 with mobile numbers. Atlanta is the largest hub.

This list covers lean 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

4,889Companies

26,702Contacts tracked

7,635Verified emails

10,396Mobile numbers

Unlock all 4,889 companies Free signup · no credit card · 500 free credits

The 25 largest lean consulting firms based in the United States

Ranked by team size

Top 25 of 4,889 lean consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names lean consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	SEIPartial evidence	Cincinnati, PA, United StatesHQ checked Sep 4, 2026	501-1,000	611
	“SEI is a management consulting firm delivering fresh perspectives and reliable results.” Source: company website · checked Sep 4, 2026
2	DLCPartial evidence	Chicago, CA, United StatesHQ checked Sep 4, 2026	201-500	541
	“DLC is an award-winning industry leader in Finance, Accounting, Program Management & Process Improvement Consulting.” Source: company website · checked Sep 4, 2026
3	SenderoPartial evidence	Dallas, AZ, United StatesHQ checked Sep 4, 2026	201-500	415
	“Sendero is a management consulting firm that optimizes technology, improves operations, advances workforce productivity, and enhances customer experience-all to deliver tangible…” Source: company website · checked Sep 4, 2026
4	Okin ProcessIndirect evidence	San Antonio, TX, United StatesHQ checked Sep 4, 2026	501-1,000	306
	“At OKIN Process, we won’t just lighten your workload.” Source: company website · checked Sep 4, 2026
5	AssystIndirect evidence	Sterling, MD, United StatesHQ checked Sep 4, 2026	51-200	289
	“ASSYST is an agile, CMMI Level 3 certified firm that simplifies IT and business processes, removes unnecessary redundancy, and delivers actionable insights for faster, smarter…” Source: company website · checked Sep 4, 2026
6	SkenderIndirect evidence	Chicago, IN, United StatesHQ checked Sep 4, 2026	201-500	272
	“The premier construction experience.” Source: company website · checked Sep 4, 2026
7	Scottmadden, INCPartial evidence	Raleigh, GA, United StatesHQ checked Sep 4, 2026	201-500	240
	“ScottMadden is a management consulting firm that does what it takes to get the job done right.” Source: company website · checked Sep 4, 2026
8	GraymatterIndirect evidence	Sewickley, PA, United StatesHQ checked Sep 4, 2026	201-500	239
	“At GrayMatter, smart thinking meets decisive doing.” Source: company website · checked Sep 4, 2026
9	Mosaic Consulting GroupPartial evidence	Nashville, TN, United StatesHQ checked Sep 4, 2026	201-500	217
	“Mosaic Consulting Group brings together deep expertise, proven best practices, and hands-on experience from hundreds of client engagements to help organizations transform how they…” Source: company website · checked Sep 4, 2026
10	Thought Logic ConsultingIndirect evidence	Atlanta, VA, United StatesHQ checked Sep 4, 2026	201-500	217
	“Thought logic is a functionally-led, digitally enabled consultancy.” Source: company website · checked Sep 4, 2026
11	CompulinkIndirect evidence	St. Petersburg, FL, United StatesHQ checked Sep 4, 2026	201-500	189
	“Compulink is a performance based company that is focused on continuous improvement in our practices and procedures as well as the quality of service to our customers.” Source: company website · checked Sep 4, 2026
12	Db&aPartial evidence	Dallas, TX, United StatesHQ checked Sep 4, 2026	201-500	173
	“With over 30 years of cross-industry management consulting experience, DB & A works to unlock your company's potential.” Source: company website · checked Sep 4, 2026
13	Synfiny AdvisorsIndirect evidence	Cincinnati, OH, United StatesHQ checked Sep 4, 2026	201-500	168
	“We are finance and general management consultants who combine technical and leadership experience to help clients get better results.” Source: company website · checked Sep 4, 2026
14	Herren AssociatesIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	143
	“Here at Herren, our goals are to drive efficiency and maximize the value of every dollar our clients spend.” Source: company website · checked Sep 4, 2026
15	Jones CarterIndirect evidence	Bellaire, TX, United StatesHQ checked Sep 4, 2026	501-1,000	140
	“Looking for Jones\|Carter?” Source: company website · checked Sep 4, 2026
16	TrissentialIndirect evidence	Minneapolis, MN, United StatesHQ checked Sep 4, 2026	201-500	135
	“Trissential, an Expleo Company, blends local trust with global reach, supported by experts across 29 countries.” Source: company website · checked Sep 4, 2026
17	Telesolv ConsultingIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	201-500	129
	“To become a demand business, an organization must constantly improve the value created by its core business processes.” Source: company website · checked Sep 4, 2026
18	Applied Value GroupPartial evidence	New York, NY, United StatesHQ checked Sep 4, 2026	51-200	125
	“Founded in 1997 by Executive Chairman Bruce Grant and the late Jan Stenbeck, Applied Value Group is a leading global management consulting firm with decades of experience growing…” Source: company website · checked Sep 4, 2026
19	Tefen Management ConsultingPartial evidence	New York, NY, United StatesHQ checked Sep 4, 2026	201-500	118
	“Tefen is an international management consulting firm, committed to driving organizations towards achieving performance excellence.” Source: company website · checked Sep 4, 2026
20	SynergeticsPartial evidence	Portsmouth, NH, United StatesHQ checked Sep 4, 2026	51-200	113
	“Synergetics has grown to become one of the most respected global management consulting firms, partnering with companies and their stakeholders to help improve operating…” Source: company website · checked Sep 4, 2026
21	Polytron, INCIndirect evidence	Duluth, GA, United StatesHQ checked Sep 4, 2026	51-200	106
	“In today's manufacturing landscape, there are abundant opportunities to enhance performance; but finding the time and resources in-house can be challenging.” Source: company website · checked Sep 4, 2026
22	Ijility, LLCIndirect evidence	Milton, MD, United StatesHQ checked Sep 4, 2026	501-1,000	106
	“Meet iJility.” Source: company website · checked Sep 4, 2026
23	CGN GlobalPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	201-500	104
	“A Chicago-based firm with offices in Mexico, the UK, France, Turkey, India, and China, providing supply chain, digital, strategy and transformation consulting services to…” Source: company website · checked Sep 4, 2026
24	FMP Federal Management Partners, LLCIndirect evidence	Arlington, VA, United StatesHQ checked Sep 4, 2026	51-200	103
	“Founded in 1991, our mission is to help organizations become more responsive, efficient and effective by providing high value and quality service.” Source: company website · checked Sep 4, 2026
25	Engaging Solutions, LLCPartial evidence	Indianapolis, United StatesHQ checked Sep 4, 2026	51-200	100
	“Engaging Solutions is a multi-faceted management consulting firm with the personnel and resources to accomplish everything from high level management and auditing to ground-level…” Source: company website · checked Sep 4, 2026

Showing 25 of 4,889 lean consulting firms based in the United States

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Lean consulting firms based in the United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

AtlantaLargest hub · 133 HQs

10,396Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

3,932

11-50

723

51-200

153

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

31–60

648

61–90

4,071

90–180

2,864

180+

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 consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among lean 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 an evidence 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, 7,635 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 4, 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 consulting firms by metro

Frequently asked

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

RevenueBase identified 4,889 lean 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?

SEI, headquartered in Philadelphia, tops this list with the largest team on record.

Which city has the most lean consulting firms?

Atlanta leads with 133 headquartered companies, followed by New York (114) and Houston (113).

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 7,635 verified decision-maker contacts tracked across these 4,889 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 4, 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 SmartSearch, 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.