Company lists · Data refreshed September 2026

Top 25 Esg compliance consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 10,782 companies tracked

RevenueBase identified 10,782 esg compliance consulting firms worldwide as of September 2026 and tracks 74,168 professional contacts across them, including 23,703 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers esg compliance consulting firms 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 28, 2026. Country and city lists for esg compliance consulting firms 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 28, 2026 86% judged on-target in blind review

10,782Companies

74,168Contacts tracked

23,703Verified emails

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The 25 largest esg compliance consulting firms worldwide

Ranked by team size

Top 25 of 10,782 esg compliance consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to esg compliance 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	Ambipar	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 28, 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 28, 2026
2	Ecovadis	Indirect evidence	Paris, JapanHQ checked Sep 28, 2026	1,001-5,000	1,854 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
3	Apex Companies	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,137 contacts →
	Indirect evidence “Who is Apex?” Source: RevenueBase Database · checked Sep 28, 2026
4	Morningstar Sustainalytics	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 28, 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 28, 2026
5	Achilles Information Limited	Indirect evidence	Abingdon, United KingdomHQ checked Sep 28, 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 28, 2026
6	Antea Group USA	Partial evidence	St Paul, MN, United StatesHQ checked Sep 28, 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 28, 2026
7	Diagonal	Partial evidence	Sao Paulo, BrazilHQ checked Sep 28, 2026	501-1,000	527 contacts →
	Partial evidence “Diagonal is a pioneering socio-environmental management consultancy that helps companies, organizations and governments to raise their ESG standard and generate a positive…” Source: RevenueBase Database · checked Sep 28, 2026
8	Sete Soluções E Tecnologia Ambiental	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 28, 2026	501-1,000	448 contacts →
	Indirect evidence “Somos uma das maiores consultorias em meio ambiente do Brasil, fundada em 1997, contando, hoje, com uma equipe técnica multidisciplinar permanente, que congrega profissionais das…” Source: RevenueBase Database · checked Sep 28, 2026
9	EMM Consulting PTY Limited	Indirect evidence	St Leonards, AustraliaHQ checked Sep 28, 2026	201-500	361 contacts →
	Indirect evidence “At EMM, we believe that a sustainable future is achievable, and we are dedicated to helping our clients and the community make it a reality.” Source: RevenueBase Database · checked Sep 28, 2026
10	Valpak Limited	Partial evidence	Stratford-upon-avon, United KingdomHQ checked Sep 28, 2026	201-500	347 contacts →
	Partial evidence “Valpak, a Reconomy brand, is an EcoVadis Platinum certified leader in environmental compliance, recycling, and sustainability solutions.” Source: RevenueBase Database · checked Sep 28, 2026
11	Ecol Studio Lifeanalytics	Indirect evidence	Lucca, ItalyHQ checked Sep 28, 2026	201-500	345 contacts →
	Indirect evidence “Salute, Sicurezza, Ambiente e Qualità del prodotto: sei davvero sostenibile?” Source: RevenueBase Database · checked Sep 28, 2026
12	Moore Brasil	Indirect evidence	BrazilHQ checked Sep 28, 2026	501-1,000	332 contacts →
	Indirect evidence “Desde 1997 no Brasil, somos membros da Moore Global, uma das principais redes de Auditoria, Consultoria, Outsourcing e Tributos presente em mais de 114 países e entre as maiores…” Source: RevenueBase Database · checked Sep 28, 2026
13	Serr Synergy	Indirect evidence	Pretoria East, South AfricaHQ checked Sep 28, 2026	201-500	330 contacts →
	Indirect evidence “We provide local and international businesses, ranging from SMME's to large organizations and across a broad spectrum of industries, with tailor-made strategies and solutions to…” Source: RevenueBase Database · checked Sep 28, 2026
14	Comply	Partial evidence	New York City, NY, United StatesHQ checked Sep 28, 2026	201-500	308 contacts →
	Partial evidence “At Comply, we pride ourselves on being the champion for compliance professionals.” Source: RevenueBase Database · checked Sep 28, 2026
15	WST LAW & TAX Firm	Strong evidence	Milano, ItalyHQ checked Sep 28, 2026	201-500	300 contacts →
	Strong evidence “WST is a firm providing integrated consultancy in Legal, Tax, Risk, Compliance, ESG and Accounting areas of business.” Source: RevenueBase Database · checked Sep 28, 2026
16	Martinelli Auditores	Indirect evidence	Joinville, United StatesHQ checked Sep 28, 2026	201-500	263 contacts →
	Indirect evidence “Fundada em 1973, a MARTINELLI consolidou posição como referência em auditoria e consultoria para empresas de todos os portes e segmentos do mercado nacional.” Source: RevenueBase Database · checked Sep 28, 2026
17	EHS Support	Indirect evidence	Pittsburgh, United StatesHQ checked Sep 28, 2026	201-500	241 contacts →
	Indirect evidence “EHS Support is a global family of engineers, geologists, scientists, and technical experts who specialize in complex environmental, health, and safety (EH & S) challenges across…” Source: RevenueBase Database · checked Sep 28, 2026
18	Valora Consultores	Partial evidence	Madrid, United KingdomHQ checked Sep 28, 2026	51-200	241 contacts →
	Partial evidence “VALORA is a consulting company who focus its activity towards a new professional innovative and thrilling challenge.” Source: RevenueBase Database · checked Sep 28, 2026
19	GAP Ssma	Indirect evidence	Goiânia, BrazilHQ checked Sep 28, 2026	201-500	234 contacts →
	Indirect evidence “A GAP Ambiental oferece serviços para pequenas, médias e grandes empresas em diversas áreas que vão desde o licenciamento ao acompanhamento da execução de projetos.” Source: RevenueBase Database · checked Sep 28, 2026
20	Metiri Group	Indirect evidence	Clovis, CA, United StatesHQ checked Sep 28, 2026	n/a	233 contacts →
	Indirect evidence “Appl Inc is an environmental services company based out of 908 N Temperance Ave, Clovis, CA, United States.” Source: RevenueBase Database · checked Sep 28, 2026
21	K G Somani & CO LLP	Indirect evidence	New Delhi, IndiaHQ checked Sep 28, 2026	201-500	231 contacts →
	Indirect evidence “K.” Source: RevenueBase Database · checked Sep 28, 2026
22	Ambientare	Indirect evidence	Brasilia, BrazilHQ checked Sep 28, 2026	51-200	228 contacts →
	Indirect evidence “A Ambientare – Soluções em Meio Ambiente é uma empresa especializada na prestação de serviços na área de meio ambiente, focada no licenciamento ambiental, gestão ambiental da…” Source: RevenueBase Database · checked Sep 28, 2026
23	ESG Data & Solutions	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	201-500	223 contacts →
	Partial evidence “ESGDS provides a one-stop solution for financial institutions by helping clients with ESG Data, domain expertise to interpret new regulations and company disclosures as well as…” Source: RevenueBase Database · checked Sep 28, 2026
24	D2o	Partial evidence	Jaipur, IndiaHQ checked Sep 28, 2026	51-200	217 contacts →
	Partial evidence “Design2Occupancy Services LLP (D2O) is a leading organization providing a platform and solutions in Energy Efficiency Analysis and Energy Code Compliances, Climate Change…” Source: RevenueBase Database · checked Sep 28, 2026
25	August Mack Environmental, INC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 28, 2026	51-200	210 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 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 compliance 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 compliance consulting firms.
Partial evidence: Its own public description names part of esg compliance 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 compliance 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 10,782 esg compliance consulting firms worldwide

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Esg compliance consulting firms worldwide at a glance

As of Sep 28, 2026

32.0%Verified-email coverage

6.9Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · Sao Paulo

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

7,992

11-50

2,298

51-200

362

201-500

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 compliance 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.
Coverage: Every country. Country and city lists for esg compliance consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “esg compliance 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 compliance 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 compliance consulting firms, 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, 23,703 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 28, 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 compliance consulting firms by location

70 lists · largest first

Every Esg compliance consulting firms 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 compliance 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 compliance consulting firms are there worldwide?

RevenueBase identified 10,782 esg compliance consulting firms 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?

Ambipar, headquartered in Sao Paulo, tops this list with the largest team on record.

Which country has the most esg compliance consulting firms?

The United States leads with 1,646 companies, followed by Brazil (1,203) and the United Kingdom (641). Every esg compliance consulting firms list by country and city is linked on this page.

Which city has the most esg compliance consulting firms?

Sao Paulo leads with 252 headquartered companies, followed by London (250) and Paris (126).

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 23,703 verified decision-maker contacts tracked across these 10,782 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 28, 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.