Company lists · Data refreshed September 2026

Top 25 Sustainability reporting consultants worldwide

Name: Sustainability reporting consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 10,964 companies tracked

RevenueBase identified 10,964 sustainability reporting consultants worldwide as of September 2026 and tracks 89,631 professional contacts across them, including 32,000 with verified work emails. Brazil is the largest market and London the largest hub.

This list covers sustainability reporting 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 22, 2026. Country and city lists for sustainability reporting 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 22, 2026 86% judged on-target in blind review

10,964Companies

89,631Contacts tracked

32,000Verified emails

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

The 25 largest sustainability reporting consultants worldwide

Ranked by team size

Top 25 of 10,964 sustainability reporting consultants worldwide, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainability reporting 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 22, 2026	5,001-10,000	9,119 contacts →
	Partial evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 22, 2026
2	SLR Consulting	Partial evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
3	BDO Nederland	Indirect evidence	Eindhoven, NetherlandsHQ checked Sep 22, 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 22, 2026
4	Ecovadis	Indirect evidence	Paris, JapanHQ checked Sep 22, 2026	1,001-5,000	1,854 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
5	Adec Innovations	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 22, 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 22, 2026
6	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 22, 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 22, 2026
7	Achilles Information Limited	Indirect evidence	Abingdon, United KingdomHQ checked Sep 22, 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 22, 2026
8	Uniqus Consultech INC	Strong evidence	San Jose, CA, United StatesHQ checked Sep 22, 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 22, 2026
9	Diagonal	Partial evidence	Sao Paulo, BrazilHQ checked Sep 22, 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 22, 2026
10	ADP Consulting	Strong evidence	Melbourne, AustraliaHQ checked Sep 22, 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 22, 2026
11	SIPL	Indirect evidence	Noida, IndiaHQ checked Sep 22, 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 22, 2026
12	TRIO	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 22, 2026	201-500	383 contacts →
	Indirect evidence “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Source: RevenueBase Database · checked Sep 22, 2026
13	AESG	Strong evidence	London, United Arab EmiratesHQ checked Sep 22, 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 22, 2026
14	BSR	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 22, 2026	51-200	369 contacts →
	Indirect evidence “BSR® is a sustainable business network that provides global insights, strategic advisory services, and collaborations to nearly 250 member companies in Asia, Europe, and North…” Source: RevenueBase Database · checked Sep 22, 2026
15	EMM Consulting PTY Limited	Indirect evidence	St Leonards, AustraliaHQ checked Sep 22, 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 22, 2026
16	Valpak Limited	Partial evidence	Stratford-upon-avon, United KingdomHQ checked Sep 22, 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 22, 2026
17	Ecol Studio Lifeanalytics	Indirect evidence	Lucca, ItalyHQ checked Sep 22, 2026	201-500	345 contacts →
	Indirect evidence “Salute, Sicurezza, Ambiente e Qualità del prodotto: sei davvero sostenibile?” Source: RevenueBase Database · checked Sep 22, 2026
18	Anthesis ESP	Indirect evidence	Manlleu, SpainHQ checked Sep 22, 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 22, 2026
19	NUS Consulting Group	Indirect evidence	Park Ridge, NJ, United StatesHQ checked Sep 22, 2026	201-500	336 contacts →
	Indirect evidence “National Utility Service, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
20	Moore Brasil	Indirect evidence	BrazilHQ checked Sep 22, 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 22, 2026
21	Umwelt Environmental & Social Consultants	Indirect evidence	Teralba, AustraliaHQ checked Sep 22, 2026	201-500	329 contacts →
	Indirect evidence “Umwelt has been trusted by clients and communities for over 30 years.” Source: RevenueBase Database · checked Sep 22, 2026
22	Quantis	Partial evidence	Lausanne, SwitzerlandHQ checked Sep 22, 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 22, 2026
23	Atelier TEN	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	323 contacts →
	Partial evidence “As environmental design consultants, building services engineers and lighting designers, we are committed to high performance and sustainable design within the built environment.” Source: RevenueBase Database · checked Sep 22, 2026
24	Position Green	Strong evidence	Malmö, SwedenHQ checked Sep 22, 2026	201-500	306 contacts →
	Strong 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 22, 2026
25	WST LAW & TAX Firm	Partial evidence	Milano, ItalyHQ checked Sep 22, 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 22, 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: sustainability reporting 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 sustainability reporting consultants.
Partial evidence: Its own public description names part of sustainability reporting consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainability reporting 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 10,964 sustainability reporting consultants worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 32,000 reachable decision-makers.

Free signup · no credit card

View the full list →

Sustainability reporting consultants worldwide at a glance

As of Sep 22, 2026

35.7%Verified-email coverage

8.2Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

8,453

11-50

2,061

51-200

334

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 sustainability reporting 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 sustainability reporting consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “sustainability reporting 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 sustainability reporting 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 sustainability reporting 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, 32,000 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 22, 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.

Sustainability reporting consultants by location

57 lists · largest first

Every Sustainability reporting 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 sustainability reporting 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 sustainability reporting consultants are there worldwide?

RevenueBase identified 10,964 sustainability reporting 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 sustainability reporting consultants?

Brazil leads with 927 companies, followed by the United States (850) and the United Kingdom (820). Every sustainability reporting consultants list by country and city is linked on this page.

Which city has the most sustainability reporting consultants?

London leads with 350 headquartered companies, followed by Sao Paulo (215) and Paris (162).

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 32,000 verified decision-maker contacts tracked across these 10,964 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 22, 2026.

Ready to reach these companies? Verified emails and direct dials for all 10,964 sustainability reporting consultants 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.