Company lists · Data refreshed September 2026

Top 25 Esg strategy consulting firms based in Boston, United States

Name: Esg strategy 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 30, 2026 142 companies tracked

RevenueBase identified 142 esg strategy consulting firms headquartered in Boston, United States as of September 2026 and tracks 7,536 professional contacts across them, including 4,303 with verified work emails. Across the United States, New York is the largest hub for this category (602 companies); Boston has 142.

This list covers esg strategy 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 30, 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 30, 2026 86% judged on-target in blind review

142Companies

7,536Contacts tracked

4,303Verified emails

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The 25 largest esg strategy consulting firms based in Boston, United States

Ranked by team size

Top 25 of 142 esg strategy consulting firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to esg strategy 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	L.E.K. Consulting	Indirect evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	1,001-5,000	4,093 contacts →
	Indirect evidence “L.E.K.” Source: RevenueBase Database · checked Sep 30, 2026
2	CFGI	Indirect evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	501-1,000	1,063 contacts →
	Indirect evidence “As a leading global accounting and business advisory firm, CFGI provides solutions to solve clients’ most complex problems, without the restrictions created by auditor…” Source: RevenueBase Database · checked Sep 30, 2026
3	Altman Solon	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 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 30, 2026
4	Putnam	Indirect evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	201-500	393 contacts →
	Indirect evidence “We are now Inizio Ignite, the global advisory partner for health and life sciences, encompassing connected expertise across Research Partnership, Putnam, Vynamic, and STEM.” Source: RevenueBase Database · checked Sep 30, 2026
5	Investor Group Services IGS	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	51-200	168 contacts →
	Partial evidence “For over 25 years, IGS has helped investors and management teams make better, faster decisions, from commercial due diligence, to growth strategy, pricing, and go-to-market…” Source: RevenueBase Database · checked Sep 30, 2026
6	STAX	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 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 30, 2026
7	Boston Analytics	Strong evidence	Boston, United StatesHQ checked Sep 30, 2026	51-200	63 contacts →
	Strong 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 30, 2026
8	Tyton Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	51-200	54 contacts →
	Strong evidence “Tyton Partners is the leading provider of investment banking and strategy consulting services to the global knowledge sector.” Source: RevenueBase Database · checked Sep 30, 2026
9	Floyd Advisory LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	42 contacts →
	Partial evidence “FLOYD ADVISORY is a consulting firm providing financial and accounting expertise in areas of SEC reporting, transaction advisory, investigations and compliance, valuation and…” Source: RevenueBase Database · checked Sep 30, 2026
10	Fairmont Consulting Group	Strong evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	37 contacts →
	Strong 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 30, 2026
11	Olmstead Associates	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	51-200	37 contacts →
	Partial evidence “Raising the Operational Agility of the Investment Management community using a uniquely data-centric consulting approach.” Source: RevenueBase Database · checked Sep 30, 2026
12	Boston Strategic Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	31 contacts →
	Partial evidence “Founded in 2003, Boston Strategic Partners, Inc.” Source: RevenueBase Database · checked Sep 30, 2026
13	Fletcher Spaght, INC	Strong evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	51-200	27 contacts →
	Strong evidence “Fletcher Spaght, Inc.(FSI) is a strategy consulting and transaction advisory firm.” Source: RevenueBase Database · checked Sep 30, 2026
14	Atlantic-Acm	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	24 contacts →
	Partial evidence “Founded in 1991, ATLANTIC-ACM, is a leading strategic advisory firm to the telecom and technology sectors.” Source: RevenueBase Database · checked Sep 30, 2026
15	Alliance Consulting Group	Strong evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	24 contacts →
	Strong evidence “Alliance Consulting Group is a strategy consulting firm located in Boston, Massachusetts.” Source: RevenueBase Database · checked Sep 30, 2026
16	Sustainability Roundtable, INC	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	22 contacts →
	Partial evidence “Sustainability Roundtable Inc.(SR Inc) works to be the world's most respected strategic advisor in enterprise decarbonization.” Source: RevenueBase Database · checked Sep 30, 2026
17	Denneen & Company	Strong evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	20 contacts →
	Strong evidence “Denneen & Company is a growth strategy consulting firm that has been helping Fortune 100, private and private equity owned companies, and premier not-for-profit institutions find…” Source: RevenueBase Database · checked Sep 30, 2026
18	Highland Strategy Group	Strong evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	19 contacts →
	Strong evidence “Highland Strategy Group is a consulting firm that provides strategic support and transaction advisory services to private equity firms, management teams, and investment banks.” Source: RevenueBase Database · checked Sep 30, 2026
19	NEW Markets Advisors	Strong evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	17 contacts →
	Strong 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 30, 2026
20	Arnovia	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	15 contacts →
	Partial evidence “We provide Transaction and Growth Strategy services to private equity investors, corporations, and hedge funds lenders across their core markets.” Source: RevenueBase Database · checked Sep 30, 2026
21	Creo Advisors LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	13 contacts →
	Indirect evidence “Your Partner in Value Creation We partner with ambitious Boards, Private Equity Firms, and Management teams seeking to achieve superior performance.” Source: RevenueBase Database · checked Sep 30, 2026
22	Roundtable Strategy Advisors	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 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 30, 2026
23	Fulcrum Consulting Group	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 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 30, 2026
24	The Isosceles Group	Indirect evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	12 contacts →
	Indirect evidence “The Isosceles Group provides environmental management and occupational health and safety services to industry and governments worldwide.” Source: RevenueBase Database · checked Sep 30, 2026
25	Aadmi Consulting	Partial evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	11-50	12 contacts →
	Partial evidence “Aadmi is a full-service firm committed to helping you develop a sustainable expansion strategy that will enhance your business and foster its growth.” Source: RevenueBase Database · checked Sep 30, 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: esg strategy 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 esg strategy consulting firms.
Partial evidence: Its own public description names part of esg strategy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name esg strategy 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 142 esg strategy consulting firms based in Boston, United States

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Esg strategy consulting firms based in Boston, United States at a glance

As of Sep 30, 2026

57.1%Verified-email coverage

53.1Average contacts per company

1-10Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 142 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 esg strategy 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 “esg strategy 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 esg strategy 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 esg strategy 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, 4,303 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 30, 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.

Esg strategy 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 esg strategy 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 esg strategy consulting firms are there based in Boston, United States?

RevenueBase identified 142 esg strategy 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?

L.E.K. Consulting, headquartered in Boston, tops this list with the largest team on record.

Which city in the United States has the most esg strategy consulting firms?

New York leads the United States with 602 headquartered companies, followed by Chicago (230) and Washington (229). Boston has 142.

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 4,303 verified decision-maker contacts tracked across these 142 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 30, 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.