Company lists · Data refreshed November 2026

Top 25 Climate action consultants worldwide

RevenueBase identified 4,430 company matches for climate action consultants worldwide as of November 2026 and tracks 54,833 professional contacts across them, including 18,036 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for climate action 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 action 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
4,430Companies
54,833Contacts tracked
18,036Verified emails
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The 25 largest climate action consultants worldwide

Ranked by team size
Top 25 of 4,430 company matches for climate action 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLa Garenne-colombes, FranceHQ recorded Nov 6, 202610001+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
2Exact matchNew York, United StatesHQ recorded Nov 6, 20261,001-5,0001,446 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
3Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,000956 contacts →

Exact match

“Anthesis guides clients to sustainable performance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchZurich, SwitzerlandHQ recorded Nov 6, 2026501-1,000790 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
5Exact matchGuelph, CanadaHQ recorded Nov 6, 2026501-1,000749 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
6Exact matchLondon, United KingdomHQ recorded Nov 6, 2026n/a645 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
7Exact matchAmsterdam, NY, United StatesHQ recorded Nov 6, 2026501-1,000566 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
8Exact matchBerlin, GermanyHQ recorded Nov 6, 2026501-1,000525 contacts →

Exact match

“dena is a centre of excellence for the applied energy transition and climate protection.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchMelbourne, AustraliaHQ recorded Nov 6, 2026201-500472 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
10Exact matchParis, FranceHQ recorded Nov 6, 2026n/a470 contacts →

Exact match

“2tonnes is an immersive workshop to explore the future and act together for the climate.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500391 contacts →

Exact match

“Our mission is to accelerate the move to a decarbonised future.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchMunich, GermanyHQ recorded Nov 6, 2026501-1,000346 contacts →

Exact match

“ClimatePartner makes climate action valuable for every company at any stage of their journey.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchThe Hague, NetherlandsHQ recorded Nov 6, 2026201-500325 contacts →

Exact match

“The European Climate Foundation (ECF) is a leading philanthropic initiative dedicated to fostering the net-zero transition and ensuring a healthy, thriving planet for current and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchAmsterdam, NetherlandsHQ recorded Nov 6, 202651-200315 contacts →

Exact match

“Climate KIC is Europe's foremost climate innovation agency: an international non-profit Foundation that for over 16 years has been embedded in the places where climate ambition…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchSan Francisco, United StatesHQ recorded Nov 6, 202651-200306 contacts →

Exact match

“CPI is an analysis and advisory organization with deep expertise in finance and policy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchLondon, NY, United KingdomHQ recorded Nov 6, 202651-200256 contacts →

Exact match

“Climate Group is an international nonprofit, launched in 2004, with offices in London, Amsterdam, Beijing, New Delhi, and New York.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchBerlin, GermanyHQ recorded Nov 6, 2026201-500255 contacts →

Exact match

“adelphi consult is a leading independent consultancy specialising in climate, environment and development.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchVincennes, FranceHQ recorded Nov 6, 202651-200240 contacts →

Exact match

“NEPSEN est un bureau d'études indépendant, spécialisé dans les métiers de la transition énergétique & écologique depuis 40 ans.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchWashington, DC, United StatesHQ recorded Nov 6, 202651-200235 contacts →

Exact match

“Founded in 2007, Verra is a global mission-driven nonprofit organization that develops and manages the leading standards for climate and sustainable development.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchBilbao, SpainHQ recorded Nov 6, 2026201-500229 contacts →

Exact match

“In Global Factor we started to provide professional services on the subject of climate change in the year 2004, prior to the ratification of the Kyoto Protocol or the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchParis, FranceHQ recorded Nov 6, 202651-200212 contacts →

Exact match

“Founded by Alain Grandjean and Jean-Marc Jancovici, Carbone 4 is a leading independent consulting firm, specialized in energy transition, that offers its expertise to private or…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchIndore, IndiaHQ recorded Nov 6, 2026201-500195 contacts →

Exact match

“EKI Energy Services Ltd.(EKI), erstwhile EnKing International in the climate sector globally, is a leading Carbon Credit Developer & Supplier across the globe.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchBelo Horizonte, BrazilHQ recorded Nov 6, 2026201-500193 contacts →

Exact match

“WayCarbon is a global company specialized in solutions focused on the transition to a net-zero economy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchAmsterdam, NetherlandsHQ recorded Nov 6, 202651-200192 contacts →

Exact match

“Onze missie?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchWaterloo, United KingdomHQ recorded Nov 6, 202651-200184 contacts →

Exact match

“E3G is an independent think tank working to deliver a safe climate for all.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 4,430 climate action consultants worldwide

See the full list, filter by size, metro and specialty, and access 18,036 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Climate action consultants worldwide at a glance

As of Nov 6, 2026
32.9%Verified-email coverage
12.4Average contacts per company
1-10Median size (employees)
4.4%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
3,213
11-50
961
51-200
185
201-500
23
501-1,000
17
1,001-5,000
15
5,001-10,000
1
10001+
5

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 action consultants are linked below.
What qualifies
Company records worldwide whose business descriptions match “climate action 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 18,036 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 action consultants by location

37 lists · largest first

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

How many climate action consultants are there worldwide?

RevenueBase identified 4,430 company matches for climate action 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?

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

Which country has the most climate action consultants?

The United States leads with 460 companies, followed by the United Kingdom (433) and France (382). Every climate action consultants list by country and city is linked on this page.

Which city has the most climate action consultants?

London leads with 194 company records, followed by Paris (104) and New York (55).

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 18,036 professional contacts with verified work emails tracked across these 4,430 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.