Company lists · Data refreshed September 2026

Top 25 Esg consulting companies worldwide

Name: Esg consulting companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 17,645 companies tracked

RevenueBase identified 17,645 esg consulting companies worldwide as of September 2026 and tracks 180,172 professional contacts across them, including 61,256 with verified work emails. Brazil is the largest market and Sao Paulo the largest hub.

This list covers esg consulting companies worldwide, 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 20, 2026. Country and city lists for esg consulting companies follow the table.

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 20, 2026 86% judged on-target in blind review

17,645Companies

180,172Contacts tracked

61,256Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest esg consulting companies worldwide

Ranked by team size

Top 25 of 17,645 esg consulting companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to esg consulting companies: 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	ERM	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	5,001-10,000	9,119 contacts →
	Indirect evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 20, 2026
2	Management Solutions	Partial evidence	Madrid, SpainHQ checked Sep 20, 2026	1,001-5,000	4,468 contacts →
	Partial evidence “Management Solutions is a leading provider of business consulting services for regulated industries.” Source: RevenueBase Database · checked Sep 20, 2026
3	SLR Consulting	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	1,001-5,000	3,848 contacts →
	Indirect evidence “SLR is a committed partner in our clients’ sustainability journeys.” Source: RevenueBase Database · checked Sep 20, 2026
4	APTIM	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,639 contacts →
	Indirect evidence “APTIM enhances the quality of the environment, wellbeing of people, resilience of communities, and opportunity for employees to make a difference, not just a living.” Source: RevenueBase Database · checked Sep 20, 2026
5	Ambipar	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 20, 2026	10001+	2,599 contacts →
	Indirect evidence “Our mission is to promote ecological transformation by investing in decarbonization projects, circular economy, energy transition, and environmental regeneration.” Source: RevenueBase Database · checked Sep 20, 2026
6	Ecovadis	Indirect evidence	Paris, JapanHQ checked Sep 20, 2026	1,001-5,000	1,854 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
7	BDO Brazil	Indirect evidence	Sp, BrazilHQ checked Sep 20, 2026	1,001-5,000	1,791 contacts →
	Indirect evidence “Presidida por Raul Corrêa da Silva, a BDO RCS foi fundada em 2001 e desde então mantém participação expressiva no mercado de auditorias.” Source: RevenueBase Database · checked Sep 20, 2026
8	Swca Environmental Consultants	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,629 contacts →
	Partial evidence “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Source: RevenueBase Database · checked Sep 20, 2026
9	Montrose Environmental Group	Indirect evidence	Little Rock, AR, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,529 contacts →
	Indirect evidence “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Source: RevenueBase Database · checked Sep 20, 2026
10	Airbus Protect	Indirect evidence	Blagnac, FranceHQ checked Sep 20, 2026	1,001-5,000	1,431 contacts →
	Indirect evidence “Airbus Protect is an Airbus subsidiary bringing together expertise in cybersecurity, safety and sustainability-related services.” Source: RevenueBase Database · checked Sep 20, 2026
11	Sphera	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,349 contacts →
	Indirect evidence “Sphera creates a safer, more sustainable and productive world.” Source: RevenueBase Database · checked Sep 20, 2026
12	Adec Innovations	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,304 contacts →
	Indirect evidence “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Source: RevenueBase Database · checked Sep 20, 2026
13	RSK Group	Indirect evidence	Helsby, United KingdomHQ checked Sep 20, 2026	10001+	1,255 contacts →
	Indirect evidence “RSK Group is a global leader in the delivery of environmental and engineering solutions.” Source: RevenueBase Database · checked Sep 20, 2026
14	DGE Danmark	Indirect evidence	Højbjerg, DenmarkHQ checked Sep 20, 2026	n/a	1,176 contacts →
	Indirect evidence “Miljø er vores kernekompetence og vores ansvar.” Source: RevenueBase Database · checked Sep 20, 2026
15	Apex Companies	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,137 contacts →
	Indirect evidence “Who is Apex?” Source: RevenueBase Database · checked Sep 20, 2026
16	Trinity Consultants	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	961 contacts →
	Indirect evidence “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Source: RevenueBase Database · checked Sep 20, 2026
17	Morningstar Sustainalytics	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 20, 2026	1,001-5,000	954 contacts →
	Partial evidence “Morningstar Sustainalytics data and insights allow investors and companies to spend less time grappling with ESG and climate, and more time making the most of it.” Source: RevenueBase Database · checked Sep 20, 2026
18	Achilles Information Limited	Indirect evidence	Abingdon, United KingdomHQ checked Sep 20, 2026	501-1,000	836 contacts →
	Indirect evidence “For more than 30 years, Achilles has protected organisations’ business interests and reputations by providing unrivalled levels of supply chain transparency, carbon reduction and…” Source: RevenueBase Database · checked Sep 20, 2026
19	Uniqus Consultech INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	501-1,000	675 contacts →
	Partial evidence “Uniqus Consultech is an AI and global tech-enabled consulting company that specializes in Accounting & Reporting Consulting, Governance, Risk & Compliance, Sustainability &…” Source: RevenueBase Database · checked Sep 20, 2026
20	Antea Group USA	Partial evidence	St Paul, MN, United StatesHQ checked Sep 20, 2026	1,001-5,000	658 contacts →
	Partial evidence “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Source: RevenueBase Database · checked Sep 20, 2026
21	EQS Group	Indirect evidence	München, GermanyHQ checked Sep 20, 2026	501-1,000	568 contacts →
	Indirect evidence “EQS Group is a leading international cloud provider for corporate compliance & ethics, data privacy, sustainability management, and investor relations.” Source: RevenueBase Database · checked Sep 20, 2026
22	Solomonedwards	Indirect evidence	Wayne, PA, United StatesHQ checked Sep 20, 2026	1,001-5,000	557 contacts →
	Indirect evidence “For more than 25 years, SolomonEdwards has empowered organizations to tackle common and complex business challenges through strategic advisory, technical advocacy, and hands-on…” Source: RevenueBase Database · checked Sep 20, 2026
23	ACT Group	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 20, 2026	501-1,000	556 contacts →
	Indirect evidence “As the leading environmental solutions partner for organizations globally, ACT helps its partners meet increasing environmental action and disclosure expectations from regulators…” Source: RevenueBase Database · checked Sep 20, 2026
24	CTA Engenharia	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 2026	201-500	540 contacts →
	Indirect evidence “A CTA foi criada em 1995, em Belo Horizonte Minas Gerais, ampliando sua atividade e posicionando sua sede no estado do Rio de Janeiro em Duque de Caxias, próximo ao Pólo…” Source: RevenueBase Database · checked Sep 20, 2026
25	Grand View Research, INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	501-1,000	539 contacts →
	Partial evidence “Grand View Research is an end-to-end market research technology and consulting business.” Source: RevenueBase Database · checked Sep 20, 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 consulting companies. 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 consulting companies.
Partial evidence: Its own public description names part of esg consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name esg consulting companies. 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 17,645 esg consulting companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 61,256 reachable decision-makers.

Free signup · no credit card

View the full list →

Esg consulting companies worldwide at a glance

As of Sep 20, 2026

34.0%Verified-email coverage

10.2Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · Sao Paulo

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

12,450

11-50

4,102

51-200

767

201-500

178

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 consulting companies, 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.
Coverage: Every country. Country and city lists for esg consulting companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “esg consulting companies”. 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 consulting companies), 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 consulting companies, and records with no verified work email.
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, 61,256 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 20, 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 consulting companies by location

125 lists · largest first

Every Esg consulting companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 consulting companies, 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 consulting companies are there worldwide?

RevenueBase identified 17,645 esg consulting companies worldwide 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?

ERM, headquartered in London, tops this list with the largest team on record.

Which country has the most esg consulting companies?

Brazil leads with 2,233 companies, followed by the United States (2,232) and the United Kingdom (871). Every esg consulting companies list by country and city is linked on this page.

Which city has the most esg consulting companies?

Sao Paulo leads with 410 headquartered companies, followed by London (348) and Paris (220).

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 61,256 verified decision-maker contacts tracked across these 17,645 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 17,645 esg consulting companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.