Company lists · Data refreshed September 2026

Top 25 Biodiversity conservation nonprofits worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 3,521 companies tracked

RevenueBase identified 3,521 biodiversity conservation nonprofits worldwide as of September 2026 and tracks 61,332 professional contacts across them, including 15,856 with verified work emails. The United States is the largest market and London the largest hub.

This list covers biodiversity conservation nonprofits worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026. Country and city lists for biodiversity conservation nonprofits follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

3,521Companies

61,332Contacts tracked

15,856Verified emails

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The 25 largest biodiversity conservation nonprofits worldwide

Ranked by team size

Top 25 of 3,521 biodiversity conservation nonprofits worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to biodiversity conservation nonprofits: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	The Nature Conservancy	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	5,001-10,000	6,526 contacts →
	Indirect evidence “Air, water, food, shelter, income: nature sustains every aspect of our lives.” Source: RevenueBase Database · checked Sep 19, 2026
2	WWF	Indirect evidence	Gland, SwitzerlandHQ checked Sep 19, 2026	1,001-5,000	3,763 contacts →
	Indirect evidence “Nature is our life-support system.” Source: RevenueBase Database · checked Sep 19, 2026
3	IUCN	Partial evidence	Gland, SwitzerlandHQ checked Sep 19, 2026	501-1,000	1,965 contacts →
	Partial evidence “IUCN, the International Union for Conservation of Nature, helps the world find pragmatic solutions to our most pressing environment and development challenges.” Source: RevenueBase Database · checked Sep 19, 2026
4	Conservation International	Partial evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	501-1,000	1,560 contacts →
	Partial evidence “Since 1987, Conservation International has worked to spotlight and secure the critical benefits that nature provides to humanity.” Source: RevenueBase Database · checked Sep 19, 2026
5	World Wildlife Fund	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,290 contacts →
	Partial evidence “Our planet faces many big conservation challenges.” Source: RevenueBase Database · checked Sep 19, 2026
6	National Audubon Society	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	501-1,000	900 contacts →
	Indirect evidence “The National Audubon Society protects birds and the places they need, today and tomorrow, throughout the Americas using science, advocacy, education, and on-the-ground…” Source: RevenueBase Database · checked Sep 19, 2026
7	South African National Biodiversity Institute	Indirect evidence	South AfricaHQ checked Sep 19, 2026	501-1,000	602 contacts →
	Indirect evidence “SANBI is a comapny that manages the 9 national botanical gardens in the country and it monitors and reports to the Minister of Water and Environmental Affairs on the status of the…” Source: RevenueBase Database · checked Sep 19, 2026
8	National Wildlife Federation	Partial evidence	Reston, VA, United StatesHQ checked Sep 19, 2026	201-500	585 contacts →
	Partial evidence “As America's largest non-profit conservation organization, the National Wildlife Federation works closely with those who span the social and political spectrum, but who are…” Source: RevenueBase Database · checked Sep 19, 2026
9	Fauna & Flora	Indirect evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	501-1,000	576 contacts →
	Indirect evidence “Fauna & Flora's work spans across the globe, with over 100 projects in more than 40 countries.” Source: RevenueBase Database · checked Sep 19, 2026
10	Mass Audubon	Partial evidence	Lincoln, MA, United StatesHQ checked Sep 19, 2026	201-500	554 contacts →
	Partial evidence “Mass Audubon is the largest nature-based conservation organization in New England.” Source: RevenueBase Database · checked Sep 19, 2026
11	Taronga Conservation Society Australia	Partial evidence	Mosman, AustraliaHQ checked Sep 19, 2026	501-1,000	506 contacts →
	Partial evidence “Taronga Conservation Society Australia is a not-for-profit organisation that is committed to securing a future for wildlife.” Source: RevenueBase Database · checked Sep 19, 2026
12	ZOO DE Beauval	Indirect evidence	St Aignan, FranceHQ checked Sep 19, 2026	501-1,000	448 contacts →
	Indirect evidence “Le ZooParc de Beauval n’est pas seulement un lieu d’accueil pour les espèces animales menacées d’extinction dans la nature.” Source: RevenueBase Database · checked Sep 19, 2026
13	Instituto DE Investigación DE Recursos Biológicos Alexander VON Humboldt	Indirect evidence	Bogotá D.c., ColombiaHQ checked Sep 19, 2026	501-1,000	413 contacts →
	Indirect evidence “El Instituto Humboldt (IAVH) es una corporación civil sin ánimo de lucro, vinculada al Ministerio de Ambiente y Desarollo Sostenible (MADS) colombiano.” Source: RevenueBase Database · checked Sep 19, 2026
14	Fresque DE LA Biodiversité	Indirect evidence	Lyon, FranceHQ checked Sep 19, 2026	n/a	412 contacts →
	Indirect evidence “D’ici à 2020 au plus tard, les individus sont conscients de la valeur de la diversité biologique et des mesures qu’ils peuvent prendre pour la conserver et l’utiliser de manière…” Source: RevenueBase Database · checked Sep 19, 2026
15	WWF Germany	Partial evidence	Berlin, GermanyHQ checked Sep 19, 2026	201-500	398 contacts →
	Partial evidence “WWF is one of the world's largest and most respected independent nature conservation organizations with around 5 million supporters and a global network that is active in over 100…” Source: RevenueBase Database · checked Sep 19, 2026
16	LPO France	Partial evidence	Rochefort, FranceHQ checked Sep 19, 2026	201-500	352 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
17	Birdlife International	Indirect evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	51-200	330 contacts →
	Indirect evidence “We’re BirdLife International, the only global Partnership conserving birds and all life on our planet.” Source: RevenueBase Database · checked Sep 19, 2026
18	Frankfurt Zoological Society Zoologische Gesellschaft Frankfurt	Partial evidence	Frankfurt, GermanyHQ checked Sep 19, 2026	1,001-5,000	321 contacts →
	Partial evidence “The Frankfurt Zoological Society (FZS) was established in 1858 and is an internationally operating conservation organisation based in Frankfurt/Main.” Source: RevenueBase Database · checked Sep 19, 2026
19	Calgary ZOO	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	201-500	304 contacts →
	Indirect evidence “Founded in 1929, the Wilder Institute/Calgary Zoo is Canada’s most visited zoo and a cherished family destination for locals and visitors alike.” Source: RevenueBase Database · checked Sep 19, 2026
20	Fundación Temaikèn	Partial evidence	Belén De Escobar, ArgentinaHQ checked Sep 19, 2026	201-500	281 contacts →
	Partial evidence “Somos una organización argentina de alcance internacional cuyo propósito es conservar y restaurar la biodiversidad.” Source: RevenueBase Database · checked Sep 19, 2026
21	Planet Wild	Indirect evidence	Berlin, GermanyHQ checked Sep 19, 2026	n/a	272 contacts →
	Indirect evidence “Planet Wild is a global community of people who care deeply about nature and want to help our planet bounce back.” Source: RevenueBase Database · checked Sep 19, 2026
22	WWF Switzerland	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 19, 2026	51-200	269 contacts →
	Indirect evidence “Our mission: Together, we protect the environment and create a future worth living #forgenerationstocome.” Source: RevenueBase Database · checked Sep 19, 2026
23	Wereld Natuur Fonds Wwf-Nl	Indirect evidence	Zeist, NetherlandsHQ checked Sep 19, 2026	51-200	265 contacts →
	Indirect evidence “Natuur is het grootste wonder op aarde.” Source: RevenueBase Database · checked Sep 19, 2026
24	National Fish And Wildlife Foundation	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	252 contacts →
	Partial evidence “The National Fish and Wildlife Foundation (NFWF) works with partners to foster sustainable and impactful conservation solutions so that people and nature thrive together.” Source: RevenueBase Database · checked Sep 19, 2026
25	Naturskyddsföreningen Ssnc	Partial evidence	Stockholm, SwedenHQ checked Sep 19, 2026	51-200	246 contacts →
	Partial evidence “The Swedish Society for Nature Conservation (SSNC) is an environmental organization with power to bring about change.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: biodiversity conservation nonprofits. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names biodiversity conservation nonprofits.
Partial evidence: Its own public description names part of biodiversity conservation nonprofits, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name biodiversity conservation nonprofits. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 3,521 biodiversity conservation nonprofits worldwide

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Biodiversity conservation nonprofits worldwide at a glance

As of Sep 19, 2026

25.9%Verified-email coverage

17.4Average contacts per company

1-10Median size (employees)

1.1%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

2,159

11-50

942

51-200

287

201-500

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among biodiversity conservation nonprofits, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for biodiversity conservation nonprofits are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “biodiversity conservation nonprofits”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names biodiversity conservation nonprofits), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among biodiversity conservation nonprofits, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 15,856 across the full list. 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 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Biodiversity conservation nonprofits by location

16 lists · largest first

Every Biodiversity conservation nonprofits list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names biodiversity conservation nonprofits, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many biodiversity conservation nonprofits are there worldwide?

RevenueBase identified 3,521 biodiversity conservation nonprofits worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

The Nature Conservancy, headquartered in Arlington, tops this list with the largest team on record.

Which country has the most biodiversity conservation nonprofits?

The United States leads with 651 companies, followed by India (250) and France (226). Every biodiversity conservation nonprofits list by country and city is linked on this page.

Which city has the most biodiversity conservation nonprofits?

London leads with 38 headquartered companies, followed by Paris (34) and Mumbai (21).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 15,856 verified decision-maker contacts tracked across these 3,521 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 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 Smart Search, 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.