Company lists · Data refreshed November 2026

Top 25 Climate change consultants worldwide

Name: Climate change consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 7,322 companies tracked

RevenueBase identified 7,322 company matches for climate change consultants worldwide as of November 2026 and tracks 171,859 professional contacts across them, including 74,859 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for climate change consultants 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 6, 2026. Country and city lists for climate change consultants 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 6, 2026 How this list was built

7,322Companies

171,859Contacts tracked

74,859Verified emails

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The 25 largest climate change consultants worldwide

Ranked by team size

Top 25 of 7,322 company matches for climate change consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 6, 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 6, 2026 · View company records in RevenueBase
2	Stantec	Exact match	Edmonton, AB, CanadaHQ recorded Nov 6, 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 6, 2026 · View company records in RevenueBase
3	Engie Solutions France	Exact match	La Garenne-colombes, FranceHQ recorded Nov 6, 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 6, 2026 · View company records in RevenueBase
4	ERM	Exact match	London, United KingdomHQ recorded Nov 6, 2026	5,001-10,000	9,761 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Ricardo	Exact match	West Sussex, United KingdomHQ recorded Nov 6, 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 6, 2026 · View company records in RevenueBase
6	Cerema	Exact match	Lyon, FranceHQ recorded Nov 6, 2026	1,001-5,000	2,049 contacts →
	Exact match “Le Cerema, référent public en aménagement, accompagne l’État, les collectivités et les entreprises pour adapter les territoires au changement climatique.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Swca Environmental Consultants	Exact match	Phoenix, MA, United StatesHQ recorded Nov 6, 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 6, 2026 · View company records in RevenueBase
8	Environmental Defense Fund	Exact match	New York, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,446 contacts →
	Exact match “We are Environmental Defense Fund, a leading environmental nonprofit focused on stabilizing the climate while helping build strong and healthy communities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Verdantas	Exact match	Tampa, FL, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,275 contacts →
	Exact match “At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Nov 6, 2026	n/a	1,192 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	OLA	Exact match	Austin, TX, United StatesHQ recorded Nov 6, 2026	n/a	1,164 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 · Nov 6, 2026 · View company records in RevenueBase
12	Anthesis Group	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	956 contacts →
	Exact match “Anthesis guides clients to sustainable performance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	South Pole	Exact match	Zurich, SwitzerlandHQ recorded Nov 6, 2026	501-1,000	790 contacts →
	Exact match “South Pole is the world's leading carbon asset developer and climate consultancy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	JBA Consulting	Exact match	Skipton, United KingdomHQ recorded Nov 6, 2026	501-1,000	774 contacts →
	Exact match “Leading in society's pursuit for resilience to climate change.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	RWDI	Exact match	Guelph, CanadaHQ recorded Nov 6, 2026	501-1,000	749 contacts →
	Exact match “We are a leading global climate and performance engineering consulting firm dedicated to creating harmony between the built and natural world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Environmental Science Associates	Exact match	San Francisco, OR, United StatesHQ recorded Nov 6, 2026	501-1,000	748 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Climatebase	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	n/a	670 contacts →
	Exact match “Climatebase is the community for climate & sustainability professionals, and the world's #1 platform for green jobs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	E CO	Exact match	London, United KingdomHQ recorded Nov 6, 2026	n/a	645 contacts →
	Exact match “For over 26 years, our consultants have been supporting and guiding our clients to achieve low-carbon climate-resilient development.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	ACT Group	Exact match	Amsterdam, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	566 contacts →
	Exact match “Organizations come to ACT when a climate target, regulatory requirement, or emissions challenge needs a solution.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	STX Group	Exact match	Amsterdam, NetherlandsHQ recorded Nov 6, 2026	501-1,000	556 contacts →
	Exact match “STX Group is a leading global firm in environmental commodities trading and climate finance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	XODUS	Exact match	Aberdeen, United KingdomHQ recorded Nov 6, 2026	201-500	527 contacts →
	Exact match “As a global energy consultancy, we unite our unique and diverse people to share knowledge, innovate and inspire change within the energy industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	SEI Stockholm Environment Institute	Exact match	Stockholm, SwedenHQ recorded Nov 6, 2026	201-500	476 contacts →
	Exact match “Stockholm Environment Institute – bridging science, policy and practice We are an international non-profit research institute that tackles climate, environment and sustainable…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	ADP Consulting	Exact match	Melbourne, AustraliaHQ recorded Nov 6, 2026	201-500	472 contacts →
	Exact match “ADP Consulting, an Ayesa company, is a sustainability-led engineering consultancy on a quest to inspire a better world through influence and design.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Amphos 21	Exact match	Barcelona, SpainHQ recorded Nov 6, 2026	201-500	450 contacts →
	Exact match “Founded in 1994, in Barcelona, Spain, Amphos21 includes three companies in Spain (1994), Chile (2009) and Peru (2012).” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	AESG	Exact match	London, United Arab EmiratesHQ recorded Nov 6, 2026	201-500	427 contacts →
	Exact match “AESG is an international Consultancy, Engineering and Advisory firm committed to driving sustainability in the built environment and beyond.” Recorded in the RevenueBase company graph · Nov 6, 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 “climate change consultants”. 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 7,322 climate change consultants worldwide

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Climate change consultants worldwide at a glance

As of Nov 6, 2026

43.6%Verified-email coverage

23.5Average contacts per company

1-10Median size (employees)

3.9%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

5,328

11-50

1,539

51-200

308

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

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 climate change consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “climate change consultants” 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 74,859 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 6, 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.

Climate change consultants by location

55 lists · largest first

Every Climate change 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 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 “climate change consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many climate change consultants are there worldwide?

RevenueBase identified 7,322 company matches for climate change consultants 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 climate change consultants?

The United States leads with 788 companies, followed by the United Kingdom (729) and France (571). Every climate change consultants list by country and city is linked on this page.

Which city has the most climate change consultants?

London leads with 283 company records, followed by Paris (129) and Sao Paulo (71).

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 74,859 professional contacts with verified work emails tracked across these 7,322 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 6, 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.