Company lists · Data refreshed September 2026

Top 25 Big 5 consulting firms based in Boston, United States

Name: Big 5 consulting firms based in Boston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 173 companies tracked

RevenueBase identified 173 big 5 consulting firms headquartered in Boston, United States as of September 2026 and tracks 67,549 professional contacts across them, including 29,663 with verified work emails. Across the United States, New York is the largest hub for this category (587 companies); Boston has 173.

This list covers big 5 consulting firms headquartered in Boston, 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 23, 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 23, 2026 86% judged on-target in blind review

173Companies

67,549Contacts tracked

29,663Verified emails

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The 25 largest big 5 consulting firms based in Boston, United States

Ranked by team size

Top 25 of 173 big 5 consulting firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to big 5 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	Boston Consulting Group BCG	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	10001+	38,730 contacts →
	Partial evidence “Boston Consulting Group partners with leaders in business and society to tackle their most important challenges and capture their greatest opportunities.” Source: RevenueBase Database · checked Sep 23, 2026
2	Bain & Company	Indirect evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	10001+	21,689 contacts →
	Indirect evidence “Bain & Company is a global consultancy that helps the world’s most ambitious change makers define the future.” Source: RevenueBase Database · checked Sep 23, 2026
3	L.E.K. Consulting	Indirect evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	1,001-5,000	4,093 contacts →
	Indirect evidence “L.E.K.” Source: RevenueBase Database · checked Sep 23, 2026
4	Charles River Associates	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,479 contacts →
	Partial evidence “Charles River Associates (CRA) is a global consulting firm specializing in litigation, regulatory, financial, and management consulting.” Source: RevenueBase Database · checked Sep 23, 2026
5	Altman Solon	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	501-1,000	669 contacts →
	Partial evidence “In 2020, Altman Vilandrie & Company and Solon Management Consulting cemented a decades-long partnership across the Atlantic to form Altman Solon, the world’s largest global…” Source: RevenueBase Database · checked Sep 23, 2026
6	STAX	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	201-500	78 contacts →
	Partial evidence “Stax is a global management consulting firm serving corporate and private equity clients across a broad range of industries including software/technology, healthcare, business…” Source: RevenueBase Database · checked Sep 23, 2026
7	Boston Analytics	Partial evidence	Boston, United StatesHQ checked Sep 23, 2026	51-200	63 contacts →
	Partial evidence “Boston Analytics (BA) is a strategy consulting firm which serves Fortune 500 clients seeking insights from data to make critical business decisions.” Source: RevenueBase Database · checked Sep 23, 2026
8	Ilead Group	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	51-200	54 contacts →
	Partial evidence “iLEAD Group is a professional services group that has incubated includes several business divisions, including:* iLEAD Consulting is a business consulting and IT development firm…” Source: RevenueBase Database · checked Sep 23, 2026
9	Fairmont Consulting Group	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	37 contacts →
	Partial evidence “Fairmont Consulting Group is a Boston-based firm focused on due diligence and strategic advisory services for clients active in aerospace, defense, government services, and the…” Source: RevenueBase Database · checked Sep 23, 2026
10	LABUR	Indirect evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	37 contacts →
	Indirect evidence “LABUR brings technology and business together through sound advice, skillful delivery, and selective leadership search.” Source: RevenueBase Database · checked Sep 23, 2026
11	Harvard Partners, LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	51-200	35 contacts →
	Partial evidence “Harvard Partners is a management consulting firm focused on helping companies more effectively leverage their IT investment.” Source: RevenueBase Database · checked Sep 23, 2026
12	Advanced Management Services, Inc. AMS	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	51-200	27 contacts →
	Partial evidence “Delivering results and business performance by integrating Management Consulting Solutions, Professional Development Training Courses, and Executive & Leadership Coaching.” Source: RevenueBase Database · checked Sep 23, 2026
13	Nelsonhall	Indirect evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	24 contacts →
	Indirect evidence “NelsonHall is a leading global research and analysis firm, with unrivalled knowledge of the market for business transformation services and IT modernization.” Source: RevenueBase Database · checked Sep 23, 2026
14	Atlantic-Acm	Indirect evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	24 contacts →
	Indirect evidence “Founded in 1991, ATLANTIC-ACM, is a leading strategic advisory firm to the telecom and technology sectors.” Source: RevenueBase Database · checked Sep 23, 2026
15	Alliance Consulting Group	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	24 contacts →
	Partial evidence “Alliance Consulting Group is a strategy consulting firm located in Boston, Massachusetts.” Source: RevenueBase Database · checked Sep 23, 2026
16	NEW Markets Advisors	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	17 contacts →
	Partial evidence “Since our beginnings in 2009, New Markets Advisors has been a leading boutique consulting firm focused on the realm of innovation strategy and capabilities.” Source: RevenueBase Database · checked Sep 23, 2026
17	Retail Consulting Partners RCP	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	14 contacts →
	Partial evidence “Retail Consulting Partners is an independent and forward-thinking retail management consulting firm dedicated to providing innovative services and value to our clients.” Source: RevenueBase Database · checked Sep 23, 2026
18	Roundtable Strategy Advisors	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	51-200	13 contacts →
	Partial evidence “We are seasoned professionals within the consulting field and former C-Suite executives who know what it takes to get the job done efficiently and on-time.” Source: RevenueBase Database · checked Sep 23, 2026
19	Burnham Rosen Group	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	12 contacts →
	Partial evidence “Burnham Rosen Group (BRG) is a global leadership training and management consulting firm that brings to its clients a multi-disciplinary approach blending business strategy…” Source: RevenueBase Database · checked Sep 23, 2026
20	Vilms Consulting, LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	1-10	12 contacts →
	Partial evidence “Vilms Consulting provides Accounting, Advisory and Training Services.” Source: RevenueBase Database · checked Sep 23, 2026
21	Fulcrum Consulting Group	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	1-10	12 contacts →
	Partial evidence “Fulcrum Consulting Group is a practitioner-led management consulting firm that works with private equity and corporate executives to inform and support our clients in their…” Source: RevenueBase Database · checked Sep 23, 2026
22	Chartic	Indirect evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	7 contacts →
	Indirect evidence “Chartic partners with global market leaders in complex industrial markets to provide clarity on where to invest and how to compete.” Source: RevenueBase Database · checked Sep 23, 2026
23	Carlisle & Company, LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	51-200	7 contacts →
	Partial evidence “Carlisle is a member of Ducker Carlisle, a global consulting and M&A advisory firm with an unrivalled continuum of insights, benchmarking and strategy solutions that optimize…” Source: RevenueBase Database · checked Sep 23, 2026
24	Auribus Consulting	Indirect evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	1-10	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 23, 2026
25	Spinnaker LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 23, 2026	11-50	6 contacts →
	Indirect evidence “SPINNAKER consistently delivers exceptional quality advice, expertise and tools to top executives at Fortune companies.” Source: RevenueBase Database · checked Sep 23, 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: big 5 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 big 5 consulting firms.
Partial evidence: Its own public description names part of big 5 consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big 5 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 173 big 5 consulting firms based in Boston, United States

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Big 5 consulting firms based in Boston, United States at a glance

As of Sep 23, 2026

43.9%Verified-email coverage

390.5Average contacts per company

1-10Median size (employees)

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

114

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United States list rather than for Boston, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 173 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 big 5 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 Boston, United States whose own description of what they do matches “big 5 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 big 5 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 big 5 consulting firms, and records with no verified work email. Companies headquartered outside Boston 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, 29,663 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 23, 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.

Big 5 consulting firms by metro in the United States

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 big 5 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 big 5 consulting firms are there based in Boston, United States?

RevenueBase identified 173 big 5 consulting firms headquartered in Boston, 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?

Boston Consulting Group BCG, headquartered in Boston, tops this list with the largest team on record.

Which city in the United States has the most big 5 consulting firms?

New York leads the United States with 587 headquartered companies, followed by Chicago (350) and Atlanta (336). Boston has 173.

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 29,663 verified decision-maker contacts tracked across these 173 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 23, 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.