Company lists · Data refreshed September 2026

Top 25 Sustainability consultancy firms worldwide

Name: Sustainability consultancy firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 31,970 companies tracked

RevenueBase identified 31,970 company matches for sustainability consultancy firms worldwide as of September 2026 and tracks 408,230 professional contacts across them, including 149,801 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for sustainability consultancy firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026. Country and city lists for sustainability consultancy firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built

31,970Companies

408,230Contacts tracked

149,801Verified emails

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The 25 largest sustainability consultancy firms worldwide

Ranked by team size

Top 25 of 31,970 company matches for sustainability consultancy firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Arcadis	Exact match	Amsterdam, NetherlandsHQ recorded Sep 29, 2026	10001+	33,846 contacts →
	Exact match “Arcadis is a leading global partner, delivering transformative projects with businesses, cities and industries.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	Stantec	Exact match	Edmonton, AB, CanadaHQ recorded Sep 29, 2026	10001+	28,416 contacts →
	Exact match “Stantec empowers clients, people, and communities to rise to the world’s greatest challenges at a time when the world faces more unprecedented concerns than ever before.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Ramboll	Exact match	Copenhagen, DenmarkHQ recorded Sep 29, 2026	10001+	15,715 contacts →
	Exact match “Ramboll is a global architecture, engineering and consultancy company founded in Denmark in 1945.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	WSP In The U.S	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	10001+	9,318 contacts →
	Exact match “What if you could shape built and natural environments – and the future of those that use them?” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	ERM	Exact match	London, United KingdomHQ recorded Sep 29, 2026	5,001-10,000	9,119 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Roland Berger	Exact match	Munich, GermanyHQ recorded Sep 29, 2026	1,001-5,000	4,632 contacts →
	Exact match “Roland Berger is the only leading global strategy consultancy of European origin.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	SLR Consulting	Exact match	London, United KingdomHQ recorded Sep 29, 2026	1,001-5,000	3,848 contacts →
	Exact match “SLR is a committed partner in our clients’ sustainability journeys.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Gleeds	Exact match	Americas, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,874 contacts →
	Exact match “We’re not just a construction consultancy, we're a catalyst for change.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	APTIM	Exact match	Baton Rouge, LA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,639 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Ambipar	Exact match	Sao Paulo, BrazilHQ recorded Sep 29, 2026	10001+	2,599 contacts →
	Exact match “Our mission is to promote ecological transformation by investing in decarbonization projects, circular economy, energy transition, and environmental regeneration.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	BDO Nederland	Exact match	Eindhoven, NetherlandsHQ recorded Sep 29, 2026	1,001-5,000	2,428 contacts →
	Exact match “At BDO, we help people and organisations achieve their sustainable future.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Frost & Sullivan	Exact match	San Antonio, TX, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,330 contacts →
	Exact match “For over six decades, Frost & Sullivan has helped the world’s top companies toward transformational growth journeys that result in a stream of innovative growth opportunities.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Baringa	Exact match	London, United KingdomHQ recorded Sep 29, 2026	1,001-5,000	2,179 contacts →
	Exact match “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Ricardo	Exact match	West Sussex, United KingdomHQ recorded Sep 29, 2026	1,001-5,000	2,104 contacts →
	Exact match “Ricardo, a member of @WSP, is a global engineering company, specialising in complex propulsion, driveline and energy systems, delivering high integrity solutions for customers…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	BBA Consultants	Exact match	Mont-saint-hilaire, QC, CanadaHQ recorded Sep 29, 2026	1,001-5,000	1,863 contacts →
	Exact match “We help companies with their challenges and transformation by relying on our sharp business acumen, extensive practical experience and vast technological curiosity.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Ecovadis	Exact match	Paris, JapanHQ recorded Sep 29, 2026	1,001-5,000	1,854 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,629 contacts →
	Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,529 contacts →
	Exact match “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Adec Innovations	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,304 contacts →
	Exact match “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Cundall	Exact match	Newcastle Upon Tyne, United KingdomHQ recorded Sep 29, 2026	1,001-5,000	1,269 contacts →
	Exact match “We are a global, multi-disciplinary consultancy delivering sustainable engineering and design solutions across the built environment.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Sep 29, 2026	n/a	1,176 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	OLA	Exact match	Austin, TX, United StatesHQ recorded Sep 29, 2026	n/a	1,145 contacts →
	Exact match “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	URBIS	Exact match	Melbourne, AustraliaHQ recorded Sep 29, 2026	501-1,000	1,096 contacts →
	Exact match “Urbis is more than just a consultancy.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Triumvirate Environmental	Exact match	Somerville, MA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,068 contacts →
	Exact match “Triumvirate Environmental provides sustainable environmental solutions to leading companies in the Life Sciences, Healthcare, Education, and Advanced Manufacturing markets.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	TSE	Exact match	São Paulo/sp, BrazilHQ recorded Sep 29, 2026	5,001-10,000	1,067 contacts →
	Exact match “Somos a TSE - Total Sustainable Engineering.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “sustainability consultancy firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 31,970 sustainability consultancy firms worldwide

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Sustainability consultancy firms worldwide at a glance

As of Sep 29, 2026

36.7%Verified-email coverage

12.8Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

23,597

11-50

6,614

51-200

1,233

201-500

243

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

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for sustainability consultancy firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “sustainability consultancy firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 149,801 professional contacts with verified work emails across the full matched dataset. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Sustainability consultancy firms by location

151 lists · largest first

Every Sustainability consultancy 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “sustainability consultancy firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sustainability consultancy firms are there worldwide?

RevenueBase identified 31,970 company matches for sustainability consultancy firms worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Arcadis tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most sustainability consultancy firms?

The United States leads with 3,239 companies, followed by Brazil (3,009) and the United Kingdom (2,308). Every sustainability consultancy firms list by country and city is linked on this page.

Which city has the most sustainability consultancy firms?

London leads with 762 company records, followed by Sao Paulo (516) and Paris (433).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 149,801 professional contacts with verified work emails tracked across these 31,970 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 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 SmartSearch, 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.