Company lists · Data refreshed September 2026

Top 23 Lean consulting firms based in Chicago, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 100 companies tracked

RevenueBase identified 100 lean consulting firms headquartered in Chicago, United States as of September 2026 and tracks 634 professional contacts across them, including 152 with verified work emails. Atlanta is the largest hub.

This list covers lean consulting firms headquartered in Chicago, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

100Companies

634Contacts tracked

152Verified emails

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The 23 largest lean consulting firms based in Chicago, United States

Ranked by team size

Top 23 of 100 lean consulting firms based in Chicago, 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	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
2	PCG Consulting Group InternationalPartial evidence	Chicago, IL, United States	201-500	52
	“PCG Consulting Group offers preeminent results for B2B clients in Technology, Healthcare, Call Center, Collections, Location Services and Skip tracing sectors.” Source: company website · checked Sep 4, 2026
3	Voyage AdvisoryIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	34
	“Voyage’s team of management consultants work side-by-side with leaders to achieve their top objectives and solve their toughest problems.” Source: company website · checked Sep 4, 2026
4	Partnersolve LLCPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	14
	“PartnerSolve LLC, founded in 2001, is a management consulting firm focused on accelerating performance within their clients with an emphasis on front and back-office operations.” Source: company website · checked Sep 4, 2026
5	Lake Shore Associates, INCPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	13
	“Lake Shore Associates (LSA) is a certified woman-owned management consulting firm that provides strategic, unbiased, and objective advisory and delivery services to improve an…” Source: company website · checked Sep 4, 2026
6	Proper Consulting GroupIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	11
	“Proper leverages its expertise, data analytics, and market intelligence to identify cost reduction opportunities, and then partners with its clients to implement those…” Source: company website · checked Sep 4, 2026
7	Gillum Strategy PartnersPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	10
	“Gillum Strategy Partners is a boutique management consulting firm with a focus on the creation and execution of strategies that deliver demonstrable value.” Source: company website · checked Sep 4, 2026
8	Zenza ConsultingPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	7
	“Zenza Consulting focuses on innovation and execution at the intersection of strategy, operations, technology, data, analytics, talent and finance to help you identify and unlock…” Source: company website · checked Sep 4, 2026
9	Vitalizing Business Solutions INCPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	7
	“Vitalizing Business Solutions offers a wide range of consulting services with the necessary tools and expertise to help grow your business.” Source: company website · checked Sep 4, 2026
10	Treasury Advisors GroupPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	5
	“With decades of experience in consulting, TAG has developed a wide range of capabilities to support your needs.” Source: company website · checked Sep 4, 2026
11	Archer NSGPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	5
	“Archer’s consulting teams work closely with law firm and fortune 500 COOs, CIOs and practice managers to design practical, effective processes and support solutions that provide…” Source: company website · checked Sep 4, 2026
12	Bumper LanesIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	5
	“Helping companies and people become better versions of themselves through marketing strategy, messaging, and focusing on constant improvement to people, process, product, and…” Source: company website · checked Sep 4, 2026
13	Kairos WorldwidePartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	5
	“Kairos Worldwide is a proven leader in process engineering consulting and is dedicated to reducing waste and enabling robust, sustainable growth for all types of clients.” Source: company website · checked Sep 4, 2026
14	Coleman Group Consulting, INCPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	4
	“Coleman Group is a management consulting firm with specific expertise in strategic sourcing, which helps organizations create savings and improve operations.” Source: company website · checked Sep 4, 2026
15	The Systems EffectIndirect evidence	Chicago, United StatesHQ checked Sep 4, 2026	11-50	4
	“The System Effect helps businesses streamline operations, improve efficiency, and achieve sustainable growth through process mapping, workflow optimization, and creating clear…” Source: company website · checked Sep 4, 2026
16	Cameo ConsultingIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	4
	“We understand that each client faces unique challenges that do not fit a “cookie-cutter” solution.” Source: company website · checked Sep 4, 2026
17	BEN Jacobson ConsultantsIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	4
	“Ben Jacobson Consultants was founded in 2001 and has been helping businesses operate with maximum efficiency ever since.” Source: company website · checked Sep 4, 2026
18	Chelwood Consulting GroupPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	4
	“Chelwood Consulting Group specializes in Business Consulting for manufacturers, warehouses and distributors.” Source: company website · checked Sep 4, 2026
19	Tenet ConsultingPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	3
	“Tenet Consulting is a Chicago based Management Consulting firm that focuses on principal based consulting in areas of Strategic Sourcing, Logistics, and Operational Excellence.” Source: company website · checked Sep 4, 2026
20	Arcy AdelePartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	3
	“We are a tech and operations consulting agency- Now operating a CEO Quick Launch Our company’s competitive edge is our combination of sales strategy, supply chain/operations, and…” Source: company website · checked Sep 4, 2026
21	DNA Consulting Group, LLCIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	2
	“We help companies become more productive.” Source: company website · checked Sep 4, 2026
22	JLEANPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	2
	“We are the United States’ most experienced practitioners of the Lean method.” Source: company website · checked Sep 4, 2026
23	S.A.I.D. Strategy GroupIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	2
	“S.A.I.D.” Source: company website · checked Sep 4, 2026

Showing 23 of 100 lean consulting firms based in Chicago, United States

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Lean consulting firms based in Chicago, United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

AtlantaLargest hub · 133 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 100 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 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 Chicago, 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 Chicago 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, 152 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 in the United States

Frequently asked

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

RevenueBase identified 100 lean consulting firms headquartered in Chicago, 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?

CGN Global, headquartered in Chicago, 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 152 verified decision-maker contacts tracked across these 100 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.