Company lists · Data refreshed November 2026

Top 25 Carbon reduction nonprofits worldwide

RevenueBase identified 2,998 company matches for carbon reduction nonprofits worldwide as of November 2026 and tracks 46,335 professional contacts across them, including 13,892 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for carbon reduction 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 carbon reduction 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
2,998Companies
46,335Contacts tracked
13,892Verified emails
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The 25 largest carbon reduction nonprofits worldwide

Ranked by team size
Top 25 of 2,998 company matches for carbon reduction 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 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 matchPort Washington, WI, United StatesHQ recorded Nov 6, 20261,001-5,000899 contacts →

Exact match

“Franklin Energy delivers end-to-end sustainability solutions through a portfolio of intelligent products and services that lower energy costs, reduce carbon and waste, and grow…”

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 matchLondon, United KingdomHQ recorded Nov 6, 2026501-1,000725 contacts →

Exact match

“As the founder of environmental reporting, we believe in transparency and the power of data to drive change.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 2026201-500589 contacts →

Exact match

“Watershed is the enterprise sustainability platform.”

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 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
9Exact 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
10Exact 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
11Exact 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
12Exact 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
13Exact 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
14Exact 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
15Exact matchDartmouth, NS, CanadaHQ recorded Nov 6, 202651-200228 contacts →

Exact match

“EfficiencyOne is a leading efficiency expert.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchMinneapolis, MN, United StatesHQ recorded Nov 6, 202651-200224 contacts →

Exact match

“CEE is a community-based clean energy nonprofit with special expertise in energy efficiency that stretches back 40 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchHouston, UT, United StatesHQ recorded Nov 6, 2026201-500217 contacts →

Exact match

“Anew Climate is a global leader of diverse climate solutions, bringing innovative products and services to the public and private sectors to help reduce or offset their carbon…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchSan Jose, CA, United StatesHQ recorded Nov 6, 2026n/a208 contacts →

Exact match

“Wren Climate, PBC helps you live carbon neutral by accounting for and offsetting your carbon emissions through transparent climate projects.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact 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
20Exact matchCopenhagen, DenmarkHQ recorded Nov 6, 202651-200189 contacts →

Exact match

“Headquartered in Denmark, Agreena is powering the global transition to regenerative agriculture, operating Europe’s leading soil carbon programme.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchKampala, UgandaHQ recorded Nov 6, 202651-200177 contacts →

Exact match

“UpEnergy builds high-quality decarbonization projects that improve lives.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchAmsterdam, NetherlandsHQ recorded Nov 6, 2026201-500170 contacts →

Exact match

“Klimaatroute zet mensen in beweging.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchZurich, SwitzerlandHQ recorded Nov 6, 202651-200170 contacts →

Exact match

“myclimate is your partner for effective climate protection – both locally and globally.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchParis, FranceHQ recorded Nov 6, 202651-200160 contacts →

Exact match

“NetZero's mission is to bring biochar at scale in the tropics – for climate and people, now.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchDartmouth, NS, CanadaHQ recorded Nov 6, 202651-200159 contacts →

Exact match

“Clean Foundation helps the communities in which we work make real progress toward a cleaner future by taking on climate change challenges.”

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

Showing 25 of 2,998 carbon reduction nonprofits worldwide

See the full list, filter by size, metro and specialty, and access 13,892 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Carbon reduction nonprofits worldwide at a glance

As of Nov 6, 2026
30.0%Verified-email coverage
15.5Average contacts per company
1-10Median size (employees)
4.6%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
2,010
11-50
788
51-200
138
201-500
26
501-1,000
16
1,001-5,000
8
10001+
8

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 carbon reduction nonprofits are linked below.
What qualifies
Company records worldwide whose business descriptions match “carbon reduction 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 13,892 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.

Carbon reduction nonprofits by location

19 lists · largest first

Every Carbon reduction 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 “carbon reduction nonprofits”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many carbon reduction nonprofits are there worldwide?

RevenueBase identified 2,998 company matches for carbon reduction 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?

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 carbon reduction nonprofits?

The United States leads with 489 companies, followed by the United Kingdom (337) and India (167). Every carbon reduction nonprofits list by country and city is linked on this page.

Which city has the most carbon reduction nonprofits?

London leads with 137 company records, followed by Paris (51) and New York (39).

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 13,892 professional contacts with verified work emails tracked across these 2,998 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.