Company lists · Data refreshed November 2026

Top 23 Climate adaptation organizations based in the United States

RevenueBase identified 820 company matches for climate adaptation organizations associated with the United States as of November 2026 and tracks 46,902 professional contacts across them, including 20,957 with verified work emails. New York is the largest hub.

This list covers company matches for climate adaptation 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
820Companies
46,902Contacts tracked
20,957Verified emails
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The 23 largest climate adaptation organizations based in the United States

Ranked by team size
Top 23 of 820 company matches for climate adaptation 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 2026n/a670 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
2Exact matchBoston, MA, United StatesHQ recorded Nov 6, 202651-200241 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
3Exact matchArlington, VA, United StatesHQ recorded Nov 6, 2026201-500238 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
4Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 2026201-500224 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
5Exact matchFalmouth, MA, United StatesHQ recorded Nov 6, 202651-200163 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
6Exact matchSanta Cruz, CA, United StatesHQ recorded Nov 6, 202651-200152 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
7Exact matchSan Rafael, CA, United StatesHQ recorded Nov 6, 202651-200145 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
8Exact matchWashington, DC, United StatesHQ recorded Nov 6, 202611-50138 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
9Exact matchBoulder, CO, United StatesHQ recorded Nov 6, 202611-5095 contacts →

Exact match

“Protect Our Winters is a 501(c)(3) nonprofit that helps passionate outdoor people protect the places and experiences they love from climate change.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBaton Rouge, LA, United StatesHQ recorded Nov 6, 202651-20089 contacts →

Exact match

“The Water Institute is an independent, non-profit, applied research institution advancing science and developing integrated methods to solve complex environmental and societal…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchRockland, ME, United StatesHQ recorded Nov 6, 202611-5084 contacts →

Exact match

“We boldly navigate climate and economic change with island and coastal communities to expand opportunities and deliver solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSan Mateo, CA, United StatesHQ recorded Nov 6, 202651-20082 contacts →

Exact match

“Jupiter is the trusted leader in climate risk analytics for organizations looking to strengthen their climate resilience.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchSt. Paul, MN, United StatesHQ recorded Nov 6, 202611-5072 contacts →

Exact match

“Project Drawdown is the world’s leading guide to science-based climate solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSeattle, WA, United StatesHQ recorded Nov 6, 202611-5072 contacts →

Exact match

“OUR MISSION Forterra innovates and scales land-based solutions to address the climate crisis and support equitable, green, and prosperous communities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchBurlington, VT, United StatesHQ recorded Nov 6, 2026n/a71 contacts →

Exact match

“Run On Climate’s mission is to build the climate movement by empowering those devoted to climate justice with the skills and resources they need to move their community off of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchWashington, DC, United StatesHQ recorded Nov 6, 202651-20069 contacts →

Exact match

“The Center for Climate and Energy Solutions (C2ES) is an independent, nonpartisan, nonprofit organization working to forge practical solutions to climate change.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchOakland, CA, United StatesHQ recorded Nov 6, 202651-20067 contacts →

Exact match

“Trellis Group, formerly GreenBiz Group, empowers professional communities to confront the climate crisis while building a regenerative, prosperous and just economy that supports…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchIrvine, CA, United StatesHQ recorded Nov 6, 202611-5063 contacts →

Exact match

“Sequoia Climate Foundation believes in a world powered by clean energy, where all people are protected by policies that have averted the worst effects of climate change.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchAtlanta, GA, United StatesHQ recorded Nov 6, 202611-5063 contacts →

Exact match

“Founded 1978, Southface Institute is a national nonprofit focused on sustainability and building science.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchNY, United StatesHQ recorded Nov 6, 202611-5063 contacts →

Exact match

“We Mean Business is a global nonprofit coalition working with the world’s most influential businesses to take action on climate change.#FossilToClean Together we catalyze business…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchMiami, FL, United StatesHQ recorded Nov 6, 202611-5063 contacts →

Exact match

“The CLEO Institute is a women-led 501(c)(3) non-profit, non-partisan organization dedicated to educating and empowering communities to demand climate action, ensuring a safe…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchPalo Alto, CA, United StatesHQ recorded Nov 6, 202611-5062 contacts →

Exact match

“Bringing people together to create local solutions for a healthy planet.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchMontpelier, VT, United StatesHQ recorded Nov 6, 202651-20061 contacts →

Exact match

“ISC is an international, non-profit organization that works to support communities by creating, implementing, and scaling equitable climate change solutions for communities at the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 23 of 820 climate adaptation organizations based in the United States

See the full list, filter by size, metro and specialty, and access 20,957 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Climate adaptation organizations based in the United States at a glance

As of Nov 6, 2026
44.7%Verified-email coverage
57.2Average 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
562
11-50
200
51-200
38
201-500
10
501-1,000
3
1,001-5,000
3
5,001-10,000
1
10001+
3

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 820 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 adaptation 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 20,957 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.

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

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

RevenueBase identified 820 company matches for climate adaptation 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?

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

Which city has the most climate adaptation organizations?

New York leads with 76 company records, followed by Washington (58) 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 limited free results with 500 credits to start. Upgrading provides access to the 20,957 professional contacts with verified work emails tracked across these 820 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.