Company lists · Data refreshed November 2026

Top 25 Green nonprofits worldwide

Name: Green nonprofits worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 12,558 companies tracked

RevenueBase identified 12,558 company matches for green nonprofits worldwide as of November 2026 and tracks 128,040 professional contacts across them, including 32,944 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for green 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 green 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

12,558Companies

128,040Contacts tracked

32,944Verified emails

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The 25 largest green nonprofits worldwide

Ranked by team size

Top 25 of 12,558 company matches for green 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	The Nature Conservancy	Exact match	Arlington, NC, United StatesHQ recorded Nov 6, 2026	5,001-10,000	6,991 contacts →
	Exact match “Air, water, food, shelter, income: nature sustains every aspect of our lives.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Greenpeace	Exact match	Amsterdam, NetherlandsHQ recorded Nov 6, 2026	n/a	3,207 contacts →
	Exact match “Greenpeace is comprised of 25 independent national/regional organisations in over 55 countries across Europe, the Americas, Africa, Asia and the Pacific, as well as a…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Conservation International	Exact match	Arlington, VA, United StatesHQ recorded Nov 6, 2026	501-1,000	1,622 contacts →
	Exact match “Since 1987, Conservation International has worked to spotlight and secure the critical benefits that nature provides to humanity.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	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
5	Casa Familiar	Exact match	Albuquerque, NM, United StatesHQ recorded Nov 6, 2026	n/a	1,430 contacts →
	Exact match “Casa Familiar is a primary/secondary education company based out of 501 Atrisco Dr Sw, Albuquerque, New Mexico, United States.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Powur, PBC	Exact match	San Diego, United StatesHQ recorded Nov 6, 2026	n/a	1,155 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
7	Natural Resources Defense Council Nrdc	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	1,011 contacts →
	Exact match “NRDC is the nation's most effective environmental action organization.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Franklin Energy	Exact match	Port Washington, WI, United StatesHQ recorded Nov 6, 2026	1,001-5,000	899 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
9	Student Conservation Association	Exact match	Arlington, WA, United StatesHQ recorded Nov 6, 2026	201-500	880 contacts →
	Exact match “The Student Conservation Association (SCA) is the largest provider of hands-on environmental conservation programs for youth and adults.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	NWG S.P.A	Exact match	Prato, ItalyHQ recorded Nov 6, 2026	n/a	792 contacts →
	Exact match “Nata a Prato nel 2003 è oggi una delle più importanti realtà nel mercato della Green Economy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Centre For Alternative Technology	Exact match	Machynlleth, United KingdomHQ recorded Nov 6, 2026	n/a	654 contacts →
	Exact match “Mae Canolfan y Dechnoleg Amgen yn elusen addysg amgylcheddol sydd wedi bod yn rhannu atebion i faterion amgylcheddol ac ymchwilio iddyn nhw ers dros 50 mlynedd – gan weithio tuag…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Trust For Public Land	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	201-500	575 contacts →
	Exact match “Trust for Public Land (TPL) is a national nonprofit that works to connect everyone to the benefits and joys of the outdoors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Mass Audubon	Exact match	Lincoln, MA, United StatesHQ recorded Nov 6, 2026	201-500	575 contacts →
	Exact match “Mass Audubon is the largest nature-based conservation organization in New England.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	U.S. Green Building Council	Exact match	Washington, DC, United StatesHQ recorded Nov 6, 2026	201-500	560 contacts →
	Exact match “The U.S.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Friends Of The Earth	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	541 contacts →
	Exact match “The UK's largest grassroots environmental organisation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Kanadevia Corporation	Exact match	Osaka, JapanHQ recorded Nov 6, 2026	10001+	505 contacts →
	Exact match “Taking on the challenge, through the power of technology, to create a world that lives in balance with nature.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Foundation For Ecological Security FES	Exact match	Anand, IndiaHQ recorded Nov 6, 2026	201-500	465 contacts →
	Exact match “We work towards the ecological restoration and conservation of land and water resources, in conserving the uplands and other eco-fragile, degraded and marginalised zones of the…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Audubon Nature Institute	Exact match	New Orleans, LA, United StatesHQ recorded Nov 6, 2026	201-500	438 contacts →
	Exact match “Audubon Nature Institute is a unique private, not-for-profit organization with an expansive collection of world-class attractions, conservation programs, facilities and wilderness…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Appalachian Mountain Club	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	201-500	430 contacts →
	Exact match “The mission of the Appalachian Mountain Club is to foster the protection, enjoyment, and understanding of the outdoors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	The Providencia Group	Exact match	Ashburn, VA, United StatesHQ recorded Nov 6, 2026	201-500	415 contacts →
	Exact match “At Providencia we are focused on positively impacting the communities where we operate, the lives of vulnerable and underserved populations around the world, and the health of our…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Valpak Limited	Exact match	Stratford-upon-avon, United KingdomHQ recorded Nov 6, 2026	201-500	404 contacts →
	Exact match “Valpak, a Reconomy brand, is an EcoVadis Platinum certified leader in environmental compliance, recycling, and sustainability solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	RARE	Exact match	Arlington, VA, United StatesHQ recorded Nov 6, 2026	51-200	396 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
23	LPO France	Exact match	Rochefort, FranceHQ recorded Nov 6, 2026	201-500	386 contacts →
	Exact match “La LPO a pour objet d'agir ou de favoriser les actions en faveur de la nature et de la biodiversité dans les domaines de la connaissance, l’expertise et la recherche; la…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Preferred By Nature	Exact match	Copenhagen, DenmarkHQ recorded Nov 6, 2026	201-500	378 contacts →
	Exact match “Preferred by Nature is an international non-profit organisation working to support better land management and business practices that benefit people, nature and the climate.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	WRAP	Exact match	London, United KingdomHQ recorded Nov 6, 2026	201-500	377 contacts →
	Exact match “Our vision is a world transformed, in which Circular Living is commonplace.” 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 “green nonprofits”. 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 12,558 green nonprofits worldwide

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Green nonprofits worldwide at a glance

As of Nov 6, 2026

25.7%Verified-email coverage

10.2Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

8,498

11-50

2,998

51-200

675

201-500

178

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 green nonprofits are linked below.
What qualifies: Company records worldwide whose business descriptions match “green 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 32,944 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.

Green nonprofits by location

75 lists · largest first

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

How many green nonprofits are there worldwide?

RevenueBase identified 12,558 company matches for green 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?

The Nature Conservancy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most green nonprofits?

The United States leads with 2,783 companies, followed by India (995) and the United Kingdom (619). Every green nonprofits list by country and city is linked on this page.

Which city has the most green nonprofits?

London leads with 231 company records, followed by New York (116) and Paris (95).

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 32,944 professional contacts with verified work emails tracked across these 12,558 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.