Company lists · Data refreshed November 2026

Top 25 Sustainability consultancies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 49,233 companies tracked

RevenueBase identified 49,233 company matches for sustainability consultancies worldwide as of November 2026 and tracks 644,267 professional contacts across them, including 229,733 with verified work emails. The United Kingdom is the largest market and London the largest hub.

This list covers company matches for sustainability consultancies 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 November 5, 2026. Country and city lists for sustainability consultancies 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 Nov 5, 2026 How this list was built

49,233Companies

644,267Contacts tracked

229,733Verified emails

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The 25 largest sustainability consultancies worldwide

Ranked by team size

Top 25 of 49,233 company matches for sustainability consultancies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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, CO, United KingdomHQ recorded Nov 5, 2026	10001+	36,645 contacts →
	Exact match “Arcadis is a leading global partner, delivering transformative projects with businesses, cities and industries.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	Stantec	Exact match	Edmonton, AB, CanadaHQ recorded Nov 5, 2026	10001+	30,633 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 · Nov 5, 2026 · View company records in RevenueBase
3	Bain & Company	Exact match	Boston, MA, United StatesHQ recorded Nov 5, 2026	10001+	23,264 contacts →
	Exact match “Bain & Company is a global consultancy that helps the world’s most ambitious change makers define the future.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	SWECO	Exact match	Stockholm, SwedenHQ recorded Nov 5, 2026	10001+	19,587 contacts →
	Exact match “Sweco is at the heart of the green transition - planning and designing the sustainable communities and cities of the future.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	Ramboll	Exact match	Copenhagen, DenmarkHQ recorded Nov 5, 2026	10001+	16,684 contacts →
	Exact match “Ramboll is a global architecture, engineering and consultancy company founded in Denmark in 1945.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	Engie Solutions France	Exact match	La Garenne-colombes, FranceHQ recorded Nov 5, 2026	10001+	11,810 contacts →
	Exact match “Les activités Infrastructures Energétiques Locales d’ENGIE accompagnent les collectivités, les industries et le secteur du bâtiment sur la voie de la décarbonation.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	DAR	Exact match	Beirut, LebanonHQ recorded Nov 5, 2026	10001+	11,589 contacts →
	Exact match “Dar is one of the world’s leading consultancies, providing design, planning, engineering, sustainability consulting, digital solutions and services, project management, and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	WSP In The U.S	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	10001+	10,188 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 · Nov 5, 2026 · View company records in RevenueBase
9	ERM	Exact match	London, United KingdomHQ recorded Nov 5, 2026	5,001-10,000	9,761 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	Roland Berger	Exact match	Munich, GermanyHQ recorded Nov 5, 2026	1,001-5,000	5,034 contacts →
	Exact match “Roland Berger is the only leading global strategy consultancy of European origin.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	SLR Consulting	Exact match	London, United KingdomHQ recorded Nov 5, 2026	1,001-5,000	4,208 contacts →
	Exact match “SLR is a committed partner in our clients’ sustainability journeys.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Urbaser	Exact match	Madrid, SpainHQ recorded Nov 5, 2026	10001+	3,713 contacts →
	Exact match “Urbaser es uno de los líderes mundiales en gestión medioambiental, una compañía global orientada a la sostenibilidad, que da servicio a más de 50 millones de personas en 20 países…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Gleeds	Exact match	Americas, United StatesHQ recorded Nov 5, 2026	1,001-5,000	3,131 contacts →
	Exact match “We’re not just a construction consultancy, we're a catalyst for change.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Ambipar	Exact match	Sao Paulo, BrazilHQ recorded Nov 5, 2026	10001+	2,883 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 · Nov 5, 2026 · View company records in RevenueBase
15	NIRAS	Exact match	Allerød, DenmarkHQ recorded Nov 5, 2026	1,001-5,000	2,791 contacts →
	Exact match “At NIRAS, we engineer solutions for a shared future.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	APTIM	Exact match	Baton Rouge, OH, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,751 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 · Nov 5, 2026 · View company records in RevenueBase
17	BDO Nederland	Exact match	Eindhoven, NetherlandsHQ recorded Nov 5, 2026	1,001-5,000	2,458 contacts →
	Exact match “At BDO, we help people and organisations achieve their sustainable future.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	Baringa	Exact match	London, IL, United KingdomHQ recorded Nov 5, 2026	1,001-5,000	2,311 contacts →
	Exact match “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Ricardo	Exact match	West Sussex, United KingdomHQ recorded Nov 5, 2026	1,001-5,000	2,155 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 · Nov 5, 2026 · View company records in RevenueBase
20	Ecovadis	Exact match	Paris, JapanHQ recorded Nov 5, 2026	1,001-5,000	1,842 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Swca Environmental Consultants	Exact match	Phoenix, MA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,695 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 · Nov 5, 2026 · View company records in RevenueBase
22	IPE Global Limited	Exact match	New Delhi, IndiaHQ recorded Nov 5, 2026	501-1,000	1,452 contacts →
	Exact match “Headquartered in India with six international offices in Cambodia, Ethiopia, Kenya, the Philippines, Germany and the United Kingdom, IPE Global Group offers a range of integrated…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Efficio	Exact match	London, United KingdomHQ recorded Nov 5, 2026	1,001-5,000	1,432 contacts →
	Exact match “Efficio is a global leader in procurement and supply chain management and transformation.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Fichtner	Exact match	Stuttgart, GermanyHQ recorded Nov 5, 2026	1,001-5,000	1,396 contacts →
	Exact match “As a leading, independent engineering and consultancy enterprise active in the sectors of energy and infrastructure, Fichtner handles challenging projects in countries all over…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	Halcrow	Exact match	Dallas, TX, United StatesHQ recorded Nov 5, 2026	10001+	1,353 contacts →
	Exact match “Halcrow is now Jacobs.” Recorded in the RevenueBase company graph · Nov 5, 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 consultancies”. 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 49,233 sustainability consultancies worldwide

See the full list, filter by size, metro and specialty, and access 229,733 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Sustainability consultancies worldwide at a glance

As of Nov 5, 2026

35.7%Verified-email coverage

13.1Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · London

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

36,269

11-50

10,029

51-200

1,933

201-500

392

501-1,000

126

1,001-5,000

122

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 consultancies are linked below.
What qualifies: Company records worldwide whose business descriptions match “sustainability consultancies” 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 229,733 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 November 5, 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 consultancies by location

237 lists · largest first

Every Sustainability consultancies 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 consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sustainability consultancies are there worldwide?

RevenueBase identified 49,233 company matches for sustainability consultancies worldwide as of November 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 consultancies?

The United Kingdom leads with 4,457 companies, followed by the United States (3,813) and Brazil (3,606). Every sustainability consultancies list by country and city is linked on this page.

Which city has the most sustainability consultancies?

London leads with 1372 company records, followed by Paris (709) and Sao Paulo (705).

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 229,733 professional contacts with verified work emails tracked across these 49,233 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 November 5, 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.