Company lists · Data refreshed September 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 Sep 21, 2026 14,463 companies tracked

RevenueBase identified 14,463 company matches for climate change consultants worldwide as of September 2026 and tracks 225,536 professional contacts across them, including 91,417 with verified work emails. Brazil 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 September 21, 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 Sep 21, 2026 How this list was built

14,463Companies

225,536Contacts tracked

91,417Verified emails

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The 25 largest climate change consultants worldwide

Ranked by team size

Top 25 of 14,463 company matches for climate change consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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 21, 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 21, 2026 · View company records in RevenueBase
2	Stantec	Exact match	Edmonton, AB, CanadaHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
3	Engie Solutions France	Exact match	La Garenne-colombes, FranceHQ recorded Sep 21, 2026	10001+	12,011 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 · Sep 21, 2026 · View company records in RevenueBase
4	ERM	Exact match	London, United KingdomHQ recorded Sep 21, 2026	5,001-10,000	9,119 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	SLR Consulting	Exact match	London, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
6	APTIM	Exact match	Baton Rouge, LA, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
7	Baringa	Exact match	London, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
8	Ricardo	Exact match	West Sussex, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
9	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
10	Antea Group Nederland	Exact match	Heerenveen, NetherlandsHQ recorded Sep 21, 2026	1,001-5,000	1,397 contacts →
	Exact match “Antea Group is het thuis van 1800 trotse ingenieurs en adviseurs.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Sep 21, 2026	n/a	1,176 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	OLA	Exact match	Austin, TX, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
13	Verdantas	Exact match	Tampa, FL, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,139 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 · Sep 21, 2026 · View company records in RevenueBase
14	Anthesis Group	Exact match	London, United KingdomHQ recorded Sep 21, 2026	1,001-5,000	894 contacts →
	Exact match “Anthesis guides clients to sustainable performance.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	South Pole	Exact match	Zurich, SwitzerlandHQ recorded Sep 21, 2026	501-1,000	811 contacts →
	Exact match “South Pole is the world's leading carbon asset developer and climate consultancy.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Climatebase	Exact match	San Francisco, CA, United StatesHQ recorded Sep 21, 2026	n/a	759 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 · Sep 21, 2026 · View company records in RevenueBase
17	RWDI	Exact match	Guelph, ON, CanadaHQ recorded Sep 21, 2026	501-1,000	737 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 · Sep 21, 2026 · View company records in RevenueBase
18	Environmental Science Associates	Exact match	San Francisco, CA, United StatesHQ recorded Sep 21, 2026	501-1,000	732 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	JBA Consulting	Exact match	Skipton, United KingdomHQ recorded Sep 21, 2026	501-1,000	720 contacts →
	Exact match “Leading in society's pursuit for resilience to climate change.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	PD	Exact match	Berlin, GermanyHQ recorded Sep 21, 2026	1,001-5,000	702 contacts →
	Exact match “Die PD ist die Beratung / Für die öffentliche Hand von morgen / Seit 2008 beraten wir ausschließlich öffentliche Auftraggeber zu moderner Verwaltungsarbeit und…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Inerco	Exact match	Sevilla, SpainHQ recorded Sep 21, 2026	1,001-5,000	688 contacts →
	Exact match “INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	WTS Energy	Exact match	The Hague, NetherlandsHQ recorded Sep 21, 2026	1,001-5,000	651 contacts →
	Exact match “The Energy Transition brings new challenges and opportunities to all of us.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	E CO	Exact match	London, United KingdomHQ recorded Sep 21, 2026	n/a	621 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 · Sep 21, 2026 · View company records in RevenueBase
24	Quadrante	Exact match	Alfragide, PortugalHQ recorded Sep 21, 2026	1,001-5,000	570 contacts →
	Exact match “Quadrante is an Iberian leading professional services consulting firm in Engineering, Architecture, Environment and Sustainability, renowned for its agility, client-centric…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	ACT Group	Exact match	Amsterdam, NetherlandsHQ recorded Sep 21, 2026	501-1,000	556 contacts →
	Exact match “As the leading environmental solutions partner for organizations globally, ACT helps its partners meet increasing environmental action and disclosure expectations from regulators…” Recorded in the RevenueBase company graph · Sep 21, 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 14,463 climate change consultants worldwide

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Climate change consultants worldwide at a glance

As of Sep 21, 2026

40.5%Verified-email coverage

15.6Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

10,439

11-50

3,184

51-200

596

201-500

108

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 91,417 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 21, 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

69 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 14,463 company matches for climate change consultants 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 climate change consultants?

Brazil leads with 1,249 companies, followed by the United States (1,224) and the United Kingdom (1,107). 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 400 company records, followed by Paris (215) and Sao Paulo (201).

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 91,417 professional contacts with verified work emails tracked across these 14,463 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 21, 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.