Company lists · Data refreshed September 2026

Top 24 Conservation nonprofits based in San Francisco, United States

Name: Conservation nonprofits based in San Francisco, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 43 companies tracked

RevenueBase identified 43 conservation nonprofits headquartered in San Francisco, United States as of September 2026 and tracks 2,209 professional contacts across them, including 1,257 with verified work emails. Washington is the largest hub.

This list covers conservation nonprofits headquartered in San Francisco, United States, 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.

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

43Companies

2,209Contacts tracked

1,257Verified emails

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The 24 largest conservation nonprofits based in San Francisco, United States

Ranked by team size

Top 24 of 43 conservation nonprofits based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to 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	Earthjustice	Indirect evidence	San Francisco, United StatesHQ checked Sep 19, 2026	501-1,000	672 contacts →
	Indirect evidence “Earthjustice is a non-profit public interest law organization dedicated to protecting the magnificent places, natural resources, and wildlife of this earth, and to defending the…” Source: RevenueBase Database · checked Sep 19, 2026
2	Trust For Public Land	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	201-500	531 contacts →
	Partial evidence “Trust for Public Land (TPL) is a national nonprofit that works to connect everyone to the benefits and joys of the outdoors.” Source: RevenueBase Database · checked Sep 19, 2026
3	Golden Gate National Parks Conservancy	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	201-500	315 contacts →
	Partial evidence “Since 1981, the Golden Gate National Parks Conservancy (Parks Conservancy) has served as the nonprofit partner of the National Park Service, collaborating with the Presidio Trust…” Source: RevenueBase Database · checked Sep 19, 2026
4	Wildaid	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	99 contacts →
	Indirect evidence “Our mission is to protect wildlife and vital habitats from the illegal wildlife trade, the effects of climate change, and more.” Source: RevenueBase Database · checked Sep 19, 2026
5	Save The Redwoods League	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	51-200	95 contacts →
	Indirect evidence “Save the Redwoods is helping shape the future of California’s redwood forests.” Source: RevenueBase Database · checked Sep 19, 2026
6	California Trout	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	51-200	75 contacts →
	Partial evidence “California Trout is a non-profit conservation organization that strives to solve complex resource issues while balancing the needs of wild fish and people through science-based…” Source: RevenueBase Database · checked Sep 19, 2026
7	Rainforest Action Network	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	51-200	74 contacts →
	Indirect evidence “Rainforest Action Network preserves forests, protects the climate and upholds human rights by challenging corporate power and systemic injustice through frontline partnerships and…” Source: RevenueBase Database · checked Sep 19, 2026
8	Wildlife Conservation Network	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	68 contacts →
	Partial evidence “Founded in 2002, Wildlife Conservation Network (WCN) is dedicated to protecting endangered species and preserving their natural habitats.” Source: RevenueBase Database · checked Sep 19, 2026
9	Sustainable Conservation	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	42 contacts →
	Partial evidence “Sustainable Conservation helps California thrive by uniting people to solve the toughest challenges facing our land, air and water.” Source: RevenueBase Database · checked Sep 19, 2026
10	California State Parks Foundation	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	40 contacts →
	Indirect evidence “Mission: Protecting and preserving the California State Park system, for the benefit of all.” Source: RevenueBase Database · checked Sep 19, 2026
11	Greater Farallones Association	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	36 contacts →
	Partial evidence “Nonprofit partner to NOAA’s Greater Farallones and Cordell Bank National Marine Sanctuaries.” Source: RevenueBase Database · checked Sep 19, 2026
12	The Redford Center	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	1-10	24 contacts →
	Partial evidence “Co-founded in 2005 by activists and filmmakers Robert Redford and James Redford, The Redford Center is a nonprofit that advances environmental solutions through the power of…” Source: RevenueBase Database · checked Sep 19, 2026
13	Pacific Forest Trust	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “Since 1993, the Pacific Forest Trust (PFT) has been dedicated to conserving and sustaining America’s vital, productive forest landscapes.” Source: RevenueBase Database · checked Sep 19, 2026
14	Coral Reef Alliance	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	13 contacts →
	Partial evidence “The Coral Reef Alliance (CORAL) is a global nonprofit dedicated to preserving coral reefs on which hundreds of millions of people and 25% of ocean life rely upon.” Source: RevenueBase Database · checked Sep 19, 2026
15	Tompkins Conservation	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “Our mission is to protect wild habitat, bring back species that have gone missing, restore fully functional ecosystems, and foster local economic vitality linked to conservation.” Source: RevenueBase Database · checked Sep 19, 2026
16	Nature In The City	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Our mission is to connect everyone in San Francisco to nature by cultivating and conserving local habitats.” Source: RevenueBase Database · checked Sep 19, 2026
17	Ecoresolve	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	1-10	9 contacts →
	Partial evidence “Ecoresolve is a think tank dedicated to advancing tech-based coastal ecosystem restoration/conservation and Nature-based Solutions by bridging the gap between industrial…” Source: RevenueBase Database · checked Sep 19, 2026
18	bay.org	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	51-200	4 contacts →
	Partial evidence “San Francisco’s largest watershed conservation group, bay.org is a 501(c)(3) not-for-profit that is an amalgam of six institutions, united under one mission to protect and…” Source: RevenueBase Database · checked Sep 19, 2026
19	GO Green Foundation	Indirect evidence	San Francisco, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Indirect evidence “OUR VISION • To inspire a youth culture concerned and motivated to act on behalf of global preservation • Create a student based population to educate, share, and understand…” Source: RevenueBase Database · checked Sep 19, 2026
20	Integrity Global Partners INC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “Integrity Global Partners’ (IGP) mission is to bring together the necessary expertise to accelerate the implementation of high-quality nature-based projects and jurisdictional…” Source: RevenueBase Database · checked Sep 19, 2026
21	Action For Nature	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “Action for Nature is an environmental non-profit dedicated to empowering young people to become active stewards of the environment.” Source: RevenueBase Database · checked Sep 19, 2026
22	ZOO Labs	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	2 contacts →
	Partial evidence “Zoolabs is a 501(c)(3) nonprofit dedicated to preserving all life on Earth through food security, equitable access to technology, and strong communities.” Source: RevenueBase Database · checked Sep 19, 2026
23	Conservation Land Group	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	11-50	1 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
24	Wegotnext	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Partial evidence “WeGotNext is a certified 501c3 that amplifies individual stories of adventure and activism from communities that have been underrepresented in outdoor, conservation and…” 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: 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 conservation nonprofits.
Partial evidence: Its own public description names part of conservation nonprofits, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name 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 24 of 43 conservation nonprofits based in San Francisco, United States

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Conservation nonprofits based in San Francisco, United States at a glance

As of Sep 19, 2026

56.9%Verified-email coverage

51.4Average contacts per company

11-50Median size (employees)

190.7%Largest-city concentration · Washington

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for San Francisco, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, over 43 companies.

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 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.
What qualifies: Companies headquartered in San Francisco, United States whose own description of what they do matches “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 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 conservation nonprofits, and records with no verified work email. Companies headquartered outside San Francisco are excluded even when they keep an office there.
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, 1,257 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.

Conservation nonprofits by metro in the United States

Conservation nonprofits in Washington82
Conservation nonprofits in New York56
Conservation nonprofits in Portland51
Conservation nonprofits in San Francisco43
Conservation nonprofits in Denver36
Conservation nonprofits in Seattle35
Conservation nonprofits in Los Angeles32
Conservation nonprofits in Atlanta30
Conservation nonprofits in Austin27
Conservation nonprofits in San Diego25

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 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 conservation nonprofits are there based in San Francisco, United States?

RevenueBase identified 43 conservation nonprofits headquartered in San Francisco, United States 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?

Earthjustice, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most conservation nonprofits?

Washington leads with 82 headquartered companies, followed by New York (56) and Portland (51).

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 1,257 verified decision-maker contacts tracked across these 43 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.