Company lists · Data refreshed September 2026

Top 25 Sustainable development nonprofits worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 13,342 companies tracked

RevenueBase identified 13,342 company matches for sustainable development nonprofits worldwide as of September 2026 and tracks 137,469 professional contacts across them, including 25,581 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for sustainable development 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 September 22, 2026. Country and city lists for sustainable development 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 Sep 22, 2026 How this list was built

13,342Companies

137,469Contacts tracked

25,581Verified emails

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The 25 largest sustainable development nonprofits worldwide

Ranked by team size

Top 25 of 13,342 company matches for sustainable development nonprofits worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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	Nothing	Exact match	Nowhere Else, AustraliaHQ recorded Sep 22, 2026	n/a	9,412 contacts →
	Exact match “Nothing compares to you!” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2	The Nature Conservancy	Exact match	Arlington, VA, United StatesHQ recorded Sep 22, 2026	5,001-10,000	6,526 contacts →
	Exact match “Air, water, food, shelter, income: nature sustains every aspect of our lives.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3	IUCN	Exact match	Gland, SwitzerlandHQ recorded Sep 22, 2026	501-1,000	1,965 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 · Sep 22, 2026 · View company records in RevenueBase
4	Conservation International	Exact match	Arlington, VA, United StatesHQ recorded Sep 22, 2026	501-1,000	1,560 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 · Sep 22, 2026 · View company records in RevenueBase
5	Environmental Defense Fund	Exact match	New York, NY, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,352 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 · Sep 22, 2026 · View company records in RevenueBase
6	Winrock International	Exact match	Little Rock, AR, United StatesHQ recorded Sep 22, 2026	201-500	1,166 contacts →
	Exact match “Winrock is a recognized leader in U.S.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7	Casa Familiar	Exact match	Albuquerque, NM, United StatesHQ recorded Sep 22, 2026	n/a	1,132 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 · Sep 22, 2026 · View company records in RevenueBase
8	Praxis	Exact match	New Delhi, IndiaHQ recorded Sep 22, 2026	n/a	955 contacts →
	Exact match “Praxis is a not–for–profit NGO specialising in participatory approaches to sustainable development.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9	Student Conservation Association	Exact match	Arlington, VA, United StatesHQ recorded Sep 22, 2026	201-500	795 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 · Sep 22, 2026 · View company records in RevenueBase
10	Groundwork	Exact match	Birmingham, United KingdomHQ recorded Sep 22, 2026	1,001-5,000	750 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 · Sep 22, 2026 · View company records in RevenueBase
11	Ocean Park Corporation	Exact match	Hong Kong Island South, Hong KongHQ recorded Sep 22, 2026	1,001-5,000	628 contacts →
	Exact match “Vision Statement: A world where we take action to conserve our environment and grow positively with nature.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12	Centre For Alternative Technology	Exact match	Machynlleth, United KingdomHQ recorded Sep 22, 2026	n/a	618 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 · Sep 22, 2026 · View company records in RevenueBase
13	Fauna & Flora	Exact match	Cambridge, United KingdomHQ recorded Sep 22, 2026	501-1,000	576 contacts →
	Exact match “Fauna & Flora's work spans across the globe, with over 100 projects in more than 40 countries.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14	Mass Audubon	Exact match	Lincoln, MA, United StatesHQ recorded Sep 22, 2026	201-500	554 contacts →
	Exact match “Mass Audubon is the largest nature-based conservation organization in New England.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15	Gerar OS	Exact match	Curitiba, BrazilHQ recorded Sep 22, 2026	201-500	514 contacts →
	Exact match “Fundada em 2003, a GERAR é uma Organização Social que desenvolve e implementa projetos de sustentabilidade social e ambiental.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16	CAIRN	Exact match	Dublin City, IrelandHQ recorded Sep 22, 2026	501-1,000	478 contacts →
	Exact match “Our purpose is to build sustainable communities where people can thrive.#BuiltForGood” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17	Philippine Business For Social Progress	Exact match	Manila, PhilippinesHQ recorded Sep 22, 2026	201-500	471 contacts →
	Exact match “PBSP is the largest business-led NGO committed to poverty reduction and sustainable development through relevant and responsive programs on health, education, environment, and…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18	Foundation For Ecological Security FES	Exact match	Anand, IndiaHQ recorded Sep 22, 2026	201-500	461 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 · Sep 22, 2026 · View company records in RevenueBase
19	Kanadevia Corporation	Exact match	Osaka, JapanHQ recorded Sep 22, 2026	10001+	452 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 · Sep 22, 2026 · View company records in RevenueBase
20	The Providencia Group	Exact match	Ashburn, VA, United StatesHQ recorded Sep 22, 2026	201-500	444 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 · Sep 22, 2026 · View company records in RevenueBase
21	Habitat Derneği	Exact match	İstanbul, TürkiyeHQ recorded Sep 22, 2026	n/a	420 contacts →
	Exact match “Habitat Derneği (Habitat) sürdürülebilir kalkınma alanında çalışan bir sivil toplum kuruluşudur.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22	Thanal	Exact match	Kozhikode, IndiaHQ recorded Sep 22, 2026	1,001-5,000	420 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23	Wwf-Uk	Exact match	Woking, United KingdomHQ recorded Sep 22, 2026	201-500	411 contacts →
	Exact match “We're WWF, the charity working to bring our world back to life.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24	International Institute For Sustainable Development	Exact match	Winnipeg, MB, CanadaHQ recorded Sep 22, 2026	51-200	375 contacts →
	Exact match “The International Institute for Sustainable Development (IISD) is an award-winning think tank working to solve today’s greatest sustainable development challenges.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25	RARE	Exact match	Arlington, VA, United StatesHQ recorded Sep 22, 2026	51-200	368 contacts →
	Exact match “Rare is a global leader in driving social change for people and nature.” Recorded in the RevenueBase company graph · Sep 22, 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 “sustainable development 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 13,342 sustainable development nonprofits worldwide

See the full list, filter by size, metro and specialty, and access 25,581 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Sustainable development nonprofits worldwide at a glance

As of Sep 22, 2026

18.6%Verified-email coverage

10.3Average contacts per company

1-10Median size (employees)

1.3%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

8,300

11-50

3,584

51-200

942

201-500

270

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 sustainable development nonprofits are linked below.
What qualifies: Company records worldwide whose business descriptions match “sustainable development 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 25,581 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 September 22, 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.

Sustainable development nonprofits by location

59 lists · largest first

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

How many sustainable development nonprofits are there worldwide?

RevenueBase identified 13,342 company matches for sustainable development nonprofits worldwide as of September 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?

Nothing tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most sustainable development nonprofits?

The United States leads with 1,568 companies, followed by India (1,401) and Brazil (568). Every sustainable development nonprofits list by country and city is linked on this page.

Which city has the most sustainable development nonprofits?

London leads with 167 company records, followed by New Delhi (141) and Nairobi (104).

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 25,581 professional contacts with verified work emails tracked across these 13,342 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 September 22, 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.