Company lists · Data refreshed September 2026

Top 23 Climate adaptation organizations based in Washington, United States

Name: Climate adaptation organizations based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 57 companies tracked

RevenueBase identified 57 climate adaptation organizations headquartered in Washington, United States as of September 2026 and tracks 1,536 professional contacts across them, including 269 with verified work emails. New York is the largest hub.

This list covers climate adaptation organizations headquartered in Washington, 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

57Companies

1,536Contacts tracked

269Verified emails

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The 23 largest climate adaptation organizations based in Washington, United States

Ranked by team size

Top 23 of 57 climate adaptation organizations based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to climate adaptation organizations: 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	NDC Partnership	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	124 contacts →
	Indirect evidence “The NDC Partnership brings together 270 members, including more than 140 countries, developed and developing, and more than 110 institutions to create and deliver on ambitious…” Source: RevenueBase Database · checked Sep 19, 2026
2	Center For Climate And Energy Solutions C2es	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	67 contacts →
	Partial evidence “The Center for Climate and Energy Solutions (C2ES) is an independent, nonpartisan, nonprofit organization working to forge practical solutions to climate change.” Source: RevenueBase Database · checked Sep 19, 2026
3	Ecoamerica	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	53 contacts →
	Partial evidence “ecoAmerica grows the base of popular support for climate solutions in America with research-driven marketing, partnerships, and national programs that connect with Americans' core…” Source: RevenueBase Database · checked Sep 19, 2026
4	Institute For Governance & Sustainable Development Igsd	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	47 contacts →
	Partial evidence “IGSD’s mission is to build resilience by accelerating fast climate mitigation actions to slow near-term warming and self-reinforcing climate feedbacks, avoid catastrophic climate…” Source: RevenueBase Database · checked Sep 19, 2026
5	CCAP	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	35 contacts →
	Partial evidence “The Center for Clean Air Policy (CCAP) supports every step of climate action, from ambition to implementation.” Source: RevenueBase Database · checked Sep 19, 2026
6	Evergreen Action	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	33 contacts →
	Partial evidence “We're advancing an all-out national mobilization to defeat the climate crisis and create millions of jobs in a just, thriving, and inclusive clean energy economy.” Source: RevenueBase Database · checked Sep 19, 2026
7	Silverlining	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	n/a	32 contacts →
	Partial evidence “SilverLining is a non-profit organization dedicated to ensuring that society has sufficient options to address near-term climate risk.” Source: RevenueBase Database · checked Sep 19, 2026
8	Adaptation Fund	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	28 contacts →
	Strong evidence “Since 2010, the Adaptation Fund has committed about US$ 1.1 billion for climate change adaptation and resilience projects and programmes, including over 165 concrete localized…” Source: RevenueBase Database · checked Sep 19, 2026
9	LA Isla Network	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	24 contacts →
	Indirect evidence “La Isla Network is an NGO working at the intersection of resilience, efficiency, and occupational health comprised of an international, interdisciplinary team of researchers…” Source: RevenueBase Database · checked Sep 19, 2026
10	U.S. Climate Action Network	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1-10	15 contacts →
	Partial evidence “For the USCAN Group Page, please see "Featured Group" on the right side of the page!) USCAN is a vital and growing network for organizations active on climate change.” Source: RevenueBase Database · checked Sep 19, 2026
11	Climate Advisers	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	14 contacts →
	Partial evidence “Climate Advisers brings together globally recognized climate thought leaders on US policy and politics, international diplomacy, tropical forests and other nature-based solutions…” Source: RevenueBase Database · checked Sep 19, 2026
12	Climate Justice Resilience Fund	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1-10	11 contacts →
	Partial evidence “The Climate Justice Resilience Fund is a grantmaking initiative that supports women, youth, and Indigenous Peoples to create and share their own solutions for climate resilience.” Source: RevenueBase Database · checked Sep 19, 2026
13	EDF Action	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	501-1,000	10 contacts →
	Indirect evidence “EDF Action, the advocacy partner of the Environmental Defense Fund, builds transformative political power to help protect our environment and the health of American families.” Source: RevenueBase Database · checked Sep 19, 2026
14	Center For Climate Strategies	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	8 contacts →
	Partial evidence “The Center for Climate Strategies provides high-level support for planning, analysis, and implementation of climate, energy, and economic programs in partnership with government…” Source: RevenueBase Database · checked Sep 19, 2026
15	Association Of Climate Change Officers	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1-10	8 contacts →
	Partial evidence “The Association of Climate Change Officers is a 501(c)(3) non-profit membership organization for executives and officials worldwide in industry, government, academia and the…” Source: RevenueBase Database · checked Sep 19, 2026
16	Adaptation Leader	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	7 contacts →
	Strong evidence “We provide services to leaders of organizations that want to plan and implement climate adaptation actions to protect and maximize their investments across their programs…” Source: RevenueBase Database · checked Sep 19, 2026
17	Clima Capital Partners LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “Clima Capital Partners LLC (CLIMA) advises and creates sustainable value for local economies and communities through robust climate finance solutions, managing and mitigating…” Source: RevenueBase Database · checked Sep 19, 2026
18	ALT Surya	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “Alt Surya is a global climate advisory firm, which provides expert consulting services to clients in Asia and North America.” Source: RevenueBase Database · checked Sep 19, 2026
19	Deborah Brosnan & Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Indirect evidence “Leading and innovative company that finding solutions, bridging gaps and driving positive action for clients and the planet.” Source: RevenueBase Database · checked Sep 19, 2026
20	Eco.Logic Programs	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Indirect evidence “Eco.Logic is an arts-based environmental education organization that builds connections and inspires tangible action.” Source: RevenueBase Database · checked Sep 19, 2026
21	Emeraldplanet & The Emeraldplanet Television Productions	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	4 contacts →
	Indirect evidence “The EmeraldPlanet is a not-for-profit 501(c)(3) organization with its headquarters and television production studios in Washington, D.C.” Source: RevenueBase Database · checked Sep 19, 2026
22	Region360	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	11-50	2 contacts →
	Partial evidence “Region360 is a multi-disciplinary, international initiative spearheaded by the Environic Foundation International (EFI) that promotes sustainability and climate change education…” Source: RevenueBase Database · checked Sep 19, 2026
23	Counterspark	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Partial evidence “We have the solutions to solve climate 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: climate adaptation organizations. 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 climate adaptation organizations.
Partial evidence: Its own public description names part of climate adaptation organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name climate adaptation organizations. 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 23 of 57 climate adaptation organizations based in Washington, United States

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Climate adaptation organizations based in Washington, United States at a glance

As of Sep 19, 2026

17.5%Verified-email coverage

26.9Average contacts per company

1-10Median size (employees)

108.8%Largest-city concentration · New York

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 Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 57 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 climate adaptation organizations, 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 Washington, United States whose own description of what they do matches “climate adaptation organizations”. 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 climate adaptation organizations), 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 climate adaptation organizations, and records with no verified work email. Companies headquartered outside Washington 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, 269 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.

Climate adaptation organizations by metro in the United States

Climate adaptation organizations in New York62
Climate adaptation organizations in Washington57
Climate adaptation organizations in San Francisco31
Climate adaptation organizations in Boston28
Climate adaptation organizations in Los Angeles28

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 climate adaptation organizations, 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 climate adaptation organizations are there based in Washington, United States?

RevenueBase identified 57 climate adaptation organizations headquartered in Washington, 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?

NDC Partnership, headquartered in Washington, tops this list with the largest team on record.

Which city has the most climate adaptation organizations?

New York leads with 62 headquartered companies, followed by Washington (57) and San Francisco (31).

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 269 verified decision-maker contacts tracked across these 57 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.