Company lists · Data refreshed September 2026

Top 25 Corporate sustainability consultants worldwide

Name: Corporate sustainability consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 18,656 companies tracked

RevenueBase identified 18,656 corporate sustainability consultants worldwide as of September 2026 and tracks 139,446 professional contacts across them, including 46,306 with verified work emails. Brazil is the largest market and London the largest hub.

This list covers corporate sustainability consultants 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 19, 2026. Country and city lists for corporate sustainability consultants 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 19, 2026 86% judged on-target in blind review

18,656Companies

139,446Contacts tracked

46,306Verified emails

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The 25 largest corporate sustainability consultants worldwide

Ranked by team size

Top 25 of 18,656 corporate sustainability consultants worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to corporate sustainability consultants: 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	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	5,001-10,000	9,119 contacts →
	Partial evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 19, 2026
2	Roland Berger	Partial evidence	Munich, GermanyHQ checked Sep 19, 2026	1,001-5,000	4,632 contacts →
	Partial evidence “Roland Berger is the only leading global strategy consultancy of European origin.” Source: RevenueBase Database · checked Sep 19, 2026
3	SLR Consulting	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	3,848 contacts →
	Partial evidence “SLR is a committed partner in our clients’ sustainability journeys.” Source: RevenueBase Database · checked Sep 19, 2026
4	BDO Nederland	Indirect evidence	Eindhoven, NetherlandsHQ checked Sep 19, 2026	1,001-5,000	2,428 contacts →
	Indirect evidence “At BDO, we help people and organisations achieve their sustainable future.” Source: RevenueBase Database · checked Sep 19, 2026
5	Baringa	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	2,179 contacts →
	Indirect evidence “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Source: RevenueBase Database · checked Sep 19, 2026
6	Ecovadis	Indirect evidence	Paris, JapanHQ checked Sep 19, 2026	1,001-5,000	1,854 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
7	Adec Innovations	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 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 19, 2026
8	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	n/a	1,145 contacts →
	Partial evidence “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: RevenueBase Database · checked Sep 19, 2026
9	Tauw Nederland	Indirect evidence	Deventer, NetherlandsHQ checked Sep 19, 2026	1,001-5,000	800 contacts →
	Indirect evidence “TAUW is een Europees advies- en ingenieursbureau.” Source: RevenueBase Database · checked Sep 19, 2026
10	Uniqus Consultech INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 19, 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 19, 2026
11	Ricardo PLC	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	670 contacts →
	Indirect evidence “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Source: RevenueBase Database · checked Sep 19, 2026
12	Antea Group USA	Indirect evidence	St Paul, MN, United StatesHQ checked Sep 19, 2026	1,001-5,000	658 contacts →
	Indirect 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 19, 2026
13	Diagonal	Partial evidence	Sao Paulo, BrazilHQ checked Sep 19, 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 19, 2026
14	Synergia Consultoria Socioambiental	Partial evidence	São Paulo, BrazilHQ checked Sep 19, 2026	201-500	497 contacts →
	Partial evidence “We are a company specialized in pioneer socio-environmental consultancy, in which for more than 17 years have worked with the creation and execution of effective solutions to the…” Source: RevenueBase Database · checked Sep 19, 2026
15	ADP Consulting	Strong evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	201-500	468 contacts →
	Strong evidence “ADP Consulting, an Ayesa company, is a sustainability-led engineering consultancy on a quest to inspire a better world through influence and design.” Source: RevenueBase Database · checked Sep 19, 2026
16	Sete Soluções E Tecnologia Ambiental	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 19, 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 19, 2026
17	SIPL	Indirect evidence	Noida, IndiaHQ checked Sep 19, 2026	n/a	400 contacts →
	Indirect evidence “SIPL Pvt Ltd is an established and reputed firm in the Sustainable domain since 2008.” Source: RevenueBase Database · checked Sep 19, 2026
18	Greenflex	Indirect evidence	Paris, FranceHQ checked Sep 19, 2026	501-1,000	390 contacts →
	Indirect evidence “Since 2009, GreenFlex has been a key partner in the energy, environmental and societal transformation of organizations, enabling them to change their trajectory towards an economy…” Source: RevenueBase Database · checked Sep 19, 2026
19	TRIO	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	201-500	383 contacts →
	Indirect evidence “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Source: RevenueBase Database · checked Sep 19, 2026
20	P2s	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 19, 2026	201-500	375 contacts →
	Indirect evidence “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Source: RevenueBase Database · checked Sep 19, 2026
21	AESG	Strong evidence	London, United Arab EmiratesHQ checked Sep 19, 2026	201-500	373 contacts →
	Strong evidence “AESG is an international Consultancy, Engineering and Advisory firm committed to driving sustainability in the built environment and beyond.” Source: RevenueBase Database · checked Sep 19, 2026
22	EMM Consulting PTY Limited	Indirect evidence	St Leonards, AustraliaHQ checked Sep 19, 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 19, 2026
23	Anthesis ESP	Indirect evidence	Manlleu, SpainHQ checked Sep 19, 2026	201-500	337 contacts →
	Indirect evidence “Som una empresa especialitzada en sostenibilitat, aliada amb les organitzacions, territoris i persones compromesos amb un món més sostenible, als quals acompanyem en la seva…” Source: RevenueBase Database · checked Sep 19, 2026
24	NUS Consulting Group	Indirect evidence	Park Ridge, NJ, United StatesHQ checked Sep 19, 2026	201-500	336 contacts →
	Indirect evidence “National Utility Service, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
25	Umwelt Environmental & Social Consultants	Indirect evidence	Teralba, AustraliaHQ checked Sep 19, 2026	201-500	329 contacts →
	Indirect evidence “Umwelt has been trusted by clients and communities for over 30 years.” Source: RevenueBase Database · checked Sep 19, 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: corporate sustainability consultants. 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 corporate sustainability consultants.
Partial evidence: Its own public description names part of corporate sustainability consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name corporate sustainability consultants. 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 18,656 corporate sustainability consultants worldwide

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Corporate sustainability consultants worldwide at a glance

As of Sep 19, 2026

33.2%Verified-email coverage

7.5Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

14,524

11-50

3,388

51-200

531

201-500

105

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 corporate sustainability consultants, 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 corporate sustainability consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “corporate sustainability consultants”. 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 corporate sustainability consultants), 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 corporate sustainability consultants, 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, 46,306 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 19, 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.

Corporate sustainability consultants by location

88 lists · largest first

Every Corporate sustainability consultants 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 corporate sustainability consultants, 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 corporate sustainability consultants are there worldwide?

RevenueBase identified 18,656 corporate sustainability consultants 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 corporate sustainability consultants?

Brazil leads with 1,761 companies, followed by the United States (1,633) and the United Kingdom (1,102). Every corporate sustainability consultants list by country and city is linked on this page.

Which city has the most corporate sustainability consultants?

London leads with 472 headquartered companies, followed by Sao Paulo (364) and Paris (312).

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 46,306 verified decision-maker contacts tracked across these 18,656 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 19, 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.