Company lists · Data refreshed November 2026

Top 25 Sustainability nonprofits worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 34,671 companies tracked

RevenueBase identified 34,671 company matches for sustainability nonprofits worldwide as of November 2026 and tracks 331,152 professional contacts across them, including 80,920 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for sustainability 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 sustainability 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

34,671Companies

331,152Contacts tracked

80,920Verified emails

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The 25 largest sustainability nonprofits worldwide

Ranked by team size

Top 25 of 34,671 company matches for sustainability 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	ERM	Exact match	London, United KingdomHQ recorded Nov 6, 2026	5,001-10,000	9,761 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Nothing	Exact match	Nowhere Else, AustraliaHQ recorded Nov 6, 2026	n/a	9,559 contacts →
	Exact match “Nothing compares to you!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	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
4	SLR Consulting	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	4,208 contacts →
	Exact match “SLR is a committed partner in our clients’ sustainability journeys.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	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
6	IUCN	Exact match	Gland, SwitzerlandHQ recorded Nov 6, 2026	501-1,000	1,996 contacts →
	Exact match “IUCN, the International Union for Conservation of Nature, helps the world find pragmatic solutions to our most pressing environment and development challenges.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Ecovadis	Exact match	Paris, JapanHQ recorded Nov 6, 2026	1,001-5,000	1,842 contacts →
	Exact match “EcoVadis is a purpose-driven company dedicated to embedding sustainability intelligence into every business decision worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	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
9	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
10	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
11	World Resources Institute	Exact match	Washington, DC, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,369 contacts →
	Exact match “WRI works to improve people’s lives, protect and restore nature and stabilize the climate.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	OLA	Exact match	Austin, TX, United StatesHQ recorded Nov 6, 2026	n/a	1,164 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 · Nov 6, 2026 · View company records in RevenueBase
13	Sierra Club	Exact match	Oakland, CA, United StatesHQ recorded Nov 6, 2026	501-1,000	1,156 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
14	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
15	TSE	Exact match	São Paulo/sp, BrazilHQ recorded Nov 6, 2026	5,001-10,000	1,084 contacts →
	Exact match “Somos a TSE - Total Sustainable Engineering.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	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
17	Praxis	Exact match	New Delhi, IndiaHQ recorded Nov 6, 2026	n/a	952 contacts →
	Exact match “Praxis is a not–for–profit NGO specialising in participatory approaches to sustainable development.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	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
19	Achilles Information Limited	Exact match	Abingdon, United KingdomHQ recorded Nov 6, 2026	501-1,000	898 contacts →
	Exact match “For more than 30 years, Achilles has protected organisations’ business interests and reputations by providing unrivalled levels of supply chain transparency, carbon reduction and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	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
21	Textile Exchange	Exact match	Burbank, CA, United StatesHQ recorded Nov 6, 2026	n/a	864 contacts →
	Exact match “At Textile Exchange, we’re driving positive impact on climate change across the global textile industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Groundwork	Exact match	Birmingham, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	801 contacts →
	Exact match “Groundwork takes practical action to create a fair and green future in which people, places, and nature thrive.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	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
24	Oxfam Novib	Exact match	The Hague, NetherlandsHQ recorded Nov 6, 2026	201-500	753 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
25	CDP	Exact match	London, United KingdomHQ recorded Nov 6, 2026	501-1,000	725 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

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 “sustainability 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 34,671 sustainability nonprofits worldwide

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Sustainability nonprofits worldwide at a glance

As of Nov 6, 2026

24.4%Verified-email coverage

9.6Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

24,076

11-50

7,860

51-200

1,761

201-500

451

501-1,000

143

1,001-5,000

123

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 sustainability nonprofits are linked below.
What qualifies: Company records worldwide whose business descriptions match “sustainability 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 80,920 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.

Sustainability nonprofits by location

172 lists · largest first

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

How many sustainability nonprofits are there worldwide?

RevenueBase identified 34,671 company matches for sustainability 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?

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

Which country has the most sustainability nonprofits?

The United States leads with 5,514 companies, followed by India (2,263) and the United Kingdom (1,929). Every sustainability nonprofits list by country and city is linked on this page.

Which city has the most sustainability nonprofits?

London leads with 796 company records, followed by Sao Paulo (351) and New York (329).

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 80,920 professional contacts with verified work emails tracked across these 34,671 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.