Company lists · Data refreshed November 2026

Top 25 Climate action nonprofits worldwide

RevenueBase identified 6,980 company matches for climate action nonprofits worldwide as of November 2026 and tracks 81,369 professional contacts across them, including 19,938 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for climate action nonprofits 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 nonprofits 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
6,980Companies
81,369Contacts tracked
19,938Verified emails
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The 25 largest climate action nonprofits worldwide

Ranked by team size
Top 25 of 6,980 company matches for climate action nonprofits 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 matchLyon, FranceHQ recorded Nov 6, 2026n/a11,435 contacts →

Exact match

“Entrepreneurship in the service of the climate emergency!”

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 matchOakland, CA, United StatesHQ recorded Nov 6, 2026501-1,0001,156 contacts →

Exact match

“At the Sierra Club, we believe in the power of togetherness.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchSan Diego, United StatesHQ recorded Nov 6, 2026n/a1,155 contacts →

Exact match

“The Powur Mission: Accelerate the adoption of clean energy worldwide We're empowering our community of homeowners and advisors to thrive in the global shift to sustainable energy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact 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
6Exact matchThe Hague, NetherlandsHQ recorded Nov 6, 2026201-500753 contacts →

Exact match

“Wij strijden voor gelijkheid en we staan achter de mensen die opstaan voor gelijkheid.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 2026n/a670 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
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 matchLondon, NY, United KingdomHQ recorded Nov 6, 2026201-500518 contacts →

Exact match

“C40 is a network of nearly 100 mayors of the world’s leading cities who are working to deliver the urgent action needed right now to confront the climate crisis and create a…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchHorley, United KingdomHQ recorded Nov 6, 2026201-500472 contacts →

Exact match

“Our mission: We’ve been on a mission to help identify energy waste, save costs and reduce carbon emissions for more than 40 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact 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
12Exact matchArlington, VA, United StatesHQ recorded Nov 6, 202651-200396 contacts →

Exact match

“Rare is a global leader in driving social change for people and nature.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchLeiden, NetherlandsHQ recorded Nov 6, 202651-200396 contacts →

Exact match

“The IKEA Foundation fights global warming with and for the many people.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact 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
15Exact matchWinooski, DC, United StatesHQ recorded Nov 6, 2026201-500344 contacts →

Exact match

“For 40 years, VEIC has helped energy leaders nationwide meet their clean energy goals.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Nov 6, 202610001+344 contacts →

Exact match

“At Ambipar, we are all caretakers of the planet!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact 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
18Exact 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
19Exact matchMumbai, IndiaHQ recorded Nov 6, 2026n/a283 contacts →

Exact match

“Earth5R is a UNESCO-recognized global environmental organization driving the shift towards a green economy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSeville, SpainHQ recorded Nov 6, 2026201-500267 contacts →

Exact match

“Climate change is one of the greatest threats to our planet.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchParis, ON, FranceHQ recorded Nov 6, 2026201-500265 contacts →

Exact match

“Since 2008, PUR has helped companies turn climate and nature commitments into measurable impact on the ground.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact 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
23Exact matchStockholm, SwedenHQ recorded Nov 6, 202651-200248 contacts →

Exact match

“The Swedish Society for Nature Conservation (SSNC) is an environmental organization with power to bring about change.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchTampa, FL, United StatesHQ recorded Nov 6, 2026201-500245 contacts →

Exact match

“We are creating a more sustainable and better earth through solar energy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchBoston, MA, United StatesHQ recorded Nov 6, 202651-200241 contacts →

Exact match

“Ceres is a nonprofit advocacy organization working to accelerate the transition to a cleaner, more just, and resilient world.”

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

Showing 25 of 6,980 climate action nonprofits worldwide

See the full list, filter by size, metro and specialty, and access 19,938 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Climate action nonprofits worldwide at a glance

As of Nov 6, 2026
24.5%Verified-email coverage
11.7Average contacts per company
1-10Median size (employees)
2.9%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
4,516
11-50
1,818
51-200
431
201-500
98
501-1,000
30
1,001-5,000
32
5,001-10,000
11
10001+
27

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 nonprofits are linked below.
What qualifies
Company records worldwide whose business descriptions match “climate action nonprofits” 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 19,938 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 nonprofits by location

44 lists · largest first

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

How many climate action nonprofits are there worldwide?

RevenueBase identified 6,980 company matches for climate action nonprofits 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?

Team For The Planet tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most climate action nonprofits?

The United States leads with 1,329 companies, followed by the United Kingdom (446) and India (372). Every climate action nonprofits list by country and city is linked on this page.

Which city has the most climate action nonprofits?

London leads with 202 company records, followed by Paris (114) and New York (112).

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 19,938 professional contacts with verified work emails tracked across these 6,980 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.