Company lists · Data refreshed November 2026

Top 24 Climate action organizations based in the United States

Name: Climate action organizations based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 1,712 companies tracked

RevenueBase identified 1,712 company matches for climate action organizations associated with the United States as of November 2026 and tracks 34,791 professional contacts across them, including 11,904 with verified work emails. New York is the largest hub.

This list covers company matches for climate action organizations associated with the United States, 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.

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

1,712Companies

34,791Contacts tracked

11,904Verified emails

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The 24 largest climate action organizations based in the United States

Ranked by team size

Top 24 of 1,712 company matches for climate action organizations based in the United States, 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	Carrier	Exact match	Palm Beach Gardens, FL, United StatesHQ recorded Nov 6, 2026	10001+	8,659 contacts →
	Exact match “Carrier is a global leader in intelligent climate and energy solutions, pioneering sustainable innovations in climate technologies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	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
3	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
4	Climatebase	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	n/a	670 contacts →
	Exact match “Climatebase is the community for climate & sustainability professionals, and the world's #1 platform for green jobs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	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
6	VEIC	Exact match	Winooski, DC, United StatesHQ recorded Nov 6, 2026	201-500	344 contacts →
	Exact match “For 40 years, VEIC has helped energy leaders nationwide meet their clean energy goals.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	3degrees Group, INC	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	201-500	317 contacts →
	Exact match “3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Ceres, INC	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	51-200	241 contacts →
	Exact match “Ceres is a nonprofit advocacy organization working to accelerate the transition to a cleaner, more just, and resilient world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	The Conservation Fund	Exact match	Arlington, VA, United StatesHQ recorded Nov 6, 2026	201-500	238 contacts →
	Exact match “We are in the business of conservation, creating innovative solutions that drive nature-based action for climate protection, sustainable economies and vibrant communities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Climateworks Foundation	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	201-500	224 contacts →
	Exact match “ClimateWorks Foundation is a catalyst for accelerating climate progress, driving bold solutions that benefit people and the planet.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Center For Energy And Environment	Exact match	Minneapolis, MN, United StatesHQ recorded Nov 6, 2026	51-200	224 contacts →
	Exact match “CEE is a community-based clean energy nonprofit with special expertise in energy efficiency that stretches back 40 years.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	League Of Conservation Voters	Exact match	Washington, DC, United StatesHQ recorded Nov 6, 2026	51-200	224 contacts →
	Exact match “LCV believes our earth is worth fighting for because everyone has a right to clean air, water, and a safe, healthy community.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Anew Climate	Exact match	Houston, UT, United StatesHQ recorded Nov 6, 2026	201-500	217 contacts →
	Exact match “Anew Climate is a global leader of diverse climate solutions, bringing innovative products and services to the public and private sectors to help reduce or offset their carbon…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	WREN	Exact match	San Jose, CA, United StatesHQ recorded Nov 6, 2026	n/a	208 contacts →
	Exact match “Wren Climate, PBC helps you live carbon neutral by accounting for and offsetting your carbon emissions through transparent climate projects.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Sunrise Movement	Exact match	Washington, DC, United StatesHQ recorded Nov 6, 2026	n/a	201 contacts →
	Exact match “Sunrise is a movement of young people uniting to stop the climate crisis.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Clean AIR Task Force	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	51-200	187 contacts →
	Exact match “CATF advocates for the change in technologies and policies needed to get to a zero-emissions, high-energy planet at an affordable cost.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Food & Water Watch	Exact match	Washington, OR, United StatesHQ recorded Nov 6, 2026	51-200	178 contacts →
	Exact match “Our Purpose: Food & Water Watch mobilizes regular people to build political power to move bold & uncompromised solutions to the most pressing food, water, and climate problems of…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Woodwell Climate Research Center	Exact match	Falmouth, MA, United StatesHQ recorded Nov 6, 2026	51-200	163 contacts →
	Exact match “Woodwell Climate Research Center conducts science for solutions at the nexus of climate, people, and nature-solutions that are urgently needed to propel us toward a more…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	U.S. Energy Foundation	Exact match	San Francisco, DC, United StatesHQ recorded Nov 6, 2026	51-200	158 contacts →
	Exact match “U.S.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Ecology Action	Exact match	Santa Cruz, CA, United StatesHQ recorded Nov 6, 2026	51-200	152 contacts →
	Exact match “Ecology Action is an award-winning California 501(c)(3) non-profit that’s been inspiring sustainable community actions since 1970.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Slipstream	Exact match	Madison, WI, United StatesHQ recorded Nov 6, 2026	51-200	151 contacts →
	Exact match “We're a nonprofit headquartered in Madison, WI with an office in Chicago and remote staff across the U.S.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Cleanchoice Energy	Exact match	Washington, DC, United StatesHQ recorded Nov 6, 2026	51-200	148 contacts →
	Exact match “CleanChoice Energy is a cleantech company that empowers people and businesses to easily access climate solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	SEI	Exact match	San Rafael, CA, United StatesHQ recorded Nov 6, 2026	51-200	145 contacts →
	Exact match “SEI is an environmental nonprofit that builds leaders to accelerate climate solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	NDC Partnership	Exact match	Washington, DC, United StatesHQ recorded Nov 6, 2026	11-50	138 contacts →
	Exact match “The NDC Partnership is a global coalition advancing the Paris Agreement by strengthening capacity and collaboration for country-owned climate and development action.” 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 “climate action organizations”. 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 24 of 1,712 climate action organizations based in the United States

See the full list, filter by size, metro and specialty, and access 11,904 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Climate action organizations based in the United States at a glance

As of Nov 6, 2026

34.2%Verified-email coverage

20.3Average contacts per company

1-10Median size (employees)

9.3%Largest-city concentration · New York

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

1,134

11-50

418

51-200

111

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,712 companies.

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.
What qualifies: Company records associated with the United States whose business descriptions match “climate action organizations” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 11,904 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.

Climate action organizations by metro

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 “climate action organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many climate action organizations are there based in the United States?

RevenueBase identified 1,712 company matches for climate action organizations associated with the United States 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?

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

Which city has the most climate action organizations?

New York leads with 159 company records, followed by Washington (137) and San Francisco (84).

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 11,904 professional contacts with verified work emails tracked across these 1,712 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.