Company lists · Data refreshed September 2026

Top 25 Esg reporting and consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 8,341 companies tracked

RevenueBase identified 8,341 esg reporting and consulting firms worldwide as of September 2026 and tracks 75,193 professional contacts across them, including 26,884 with verified work emails. Brazil is the largest market and London the largest hub.

This list covers esg reporting and 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 reporting and 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

8,341Companies

75,193Contacts tracked

26,884Verified emails

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The 25 largest esg reporting and consulting firms worldwide

Ranked by team size

Top 25 of 8,341 esg reporting and 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 reporting and 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	SLR Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
2	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
3	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
4	BDO Brazil	Indirect evidence	Sp, BrazilHQ checked Sep 28, 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 28, 2026
5	Adec Innovations	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 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 28, 2026
6	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
7	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
8	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
9	Uniqus Consultech INC	Strong evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	501-1,000	675 contacts →
	Strong 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 28, 2026
10	Grand View Research, INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 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 28, 2026
11	EBI Consulting	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 28, 2026	501-1,000	535 contacts →
	Indirect evidence “For 35 years we have been helping investors, lenders, owners, developers, contractors, and property managers reduce risk and optimize their built facilities, infrastructure and…” Source: RevenueBase Database · checked Sep 28, 2026
12	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
13	Datatracks	Partial evidence	SingaporeHQ checked Sep 28, 2026	201-500	475 contacts →
	Partial evidence “Compliance isn’t about reporting data - it’s the foundation of trust, transparency, and resilience in business.” Source: RevenueBase Database · checked Sep 28, 2026
14	Sodali & CO	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	431 contacts →
	Indirect evidence “Sodali & Co advises corporate clients worldwide as they navigate the complex dynamic of shareholder and stakeholder interests.” Source: RevenueBase Database · checked Sep 28, 2026
15	SEDEX	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	427 contacts →
	Indirect evidence “Sedex is a global technology company that specialises in data, insights and professional services to empower supply chain sustainability.” Source: RevenueBase Database · checked Sep 28, 2026
16	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
17	Valpak Limited	Indirect evidence	Stratford-upon-avon, United KingdomHQ checked Sep 28, 2026	201-500	347 contacts →
	Indirect 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
18	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
19	Quantis	Partial evidence	Lausanne, SwitzerlandHQ checked Sep 28, 2026	201-500	325 contacts →
	Partial evidence “Quantis, part of BCG, is a sustainability consulting firm that helps organizations translate sustainability ambition into measurable business value.” Source: RevenueBase Database · checked Sep 28, 2026
20	Position Green	Partial evidence	Malmö, SwedenHQ checked Sep 28, 2026	201-500	306 contacts →
	Partial evidence “Position Green is a sustainability data reporting and management platform that combines software capabilities with expert advisory services to revolutionize the way businesses…” Source: RevenueBase Database · checked Sep 28, 2026
21	WST LAW & TAX Firm	Partial evidence	Milano, ItalyHQ checked Sep 28, 2026	201-500	300 contacts →
	Partial 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
22	Cohnreznick LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	5,001-10,000	281 contacts →
	Indirect evidence “With over a century’s worth of experience, nearly 4,300 global team members, and 30 locations including global subsidiaries, our firm serves clients in 30 different industries…” Source: RevenueBase Database · checked Sep 28, 2026
23	Nexia Audirevi	Indirect evidence	Milan, ItalyHQ checked Sep 28, 2026	201-500	268 contacts →
	Indirect evidence “Società consulenza aziendale, revisione e organizzazione contabile associata al network internazionale Nexia.” Source: RevenueBase Database · checked Sep 28, 2026
24	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
25	View Group Norge	Indirect evidence	Oslo, NorwayHQ checked Sep 28, 2026	501-1,000	242 contacts →
	Indirect evidence “VIEW Group leverer outsourcing av regnskap, lønn, økonomi og IT-tjenester til norske, nordiske og globale selskaper med 10 til flere tusen ansatte.” 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 reporting and 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 reporting and consulting firms.
Partial evidence: Its own public description names part of esg reporting and 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 reporting and 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 8,341 esg reporting and consulting firms worldwide

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Esg reporting and consulting firms worldwide at a glance

As of Sep 28, 2026

35.8%Verified-email coverage

9.0Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

6,032

11-50

1,845

51-200

325

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 reporting and 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 reporting and consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “esg reporting and 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 reporting and 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 reporting and 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, 26,884 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 reporting and consulting firms by location

60 lists · largest first

Every Esg reporting and 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 reporting and 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 reporting and consulting firms are there worldwide?

RevenueBase identified 8,341 esg reporting and 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?

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

Which country has the most esg reporting and consulting firms?

Brazil leads with 889 companies, followed by the United States (810) and the United Kingdom (525). Every esg reporting and consulting firms list by country and city is linked on this page.

Which city has the most esg reporting and consulting firms?

London leads with 262 headquartered companies, followed by Sao Paulo (227) and Paris (141).

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 26,884 verified decision-maker contacts tracked across these 8,341 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.