Company lists · Data refreshed September 2026

Top 24 Climate change consulting companies based in New York, United States

RevenueBase identified 108 climate change consulting companies headquartered in New York, United States as of September 2026 and tracks 2,407 professional contacts across them, including 1,306 with verified work emails. New York is the largest hub.

This list covers climate change consulting companies headquartered in New York, 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
108Companies
2,407Contacts tracked
1,306Verified emails
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The 24 largest climate change consulting companies based in New York, United States

Ranked by team size
Top 24 of 108 climate change consulting companies based in New York, 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 change consulting companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceNew York, NY, United StatesHQ checked Sep 19, 20261,001-5,0001,352 contacts →

Partial evidence

“We are Environmental Defense Fund, a leading environmental nonprofit focused on stabilizing the climate while helping build strong and healthy communities.”

Source: RevenueBase Database · checked Sep 19, 2026
2Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 202611-50133 contacts →

Indirect evidence

“At OnePointFive we solve your sustainability focused business challenges by empowering your organization with expert-led solutions, embedded training, and cutting edge tools to…”

Source: RevenueBase Database · checked Sep 19, 2026
3Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 202651-20098 contacts →

Indirect evidence

“Environ Energy is a leader in accelerating global sustainable energy transformation for more than 30 years.”

Source: RevenueBase Database · checked Sep 19, 2026
4Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 202651-20085 contacts →

Indirect evidence

“Euclid Power is comprised of a team of industry-leading veterans within renewable energy project development, diligence, finance, and execution with over 10GW of PV and 5GWh of…”

Source: RevenueBase Database · checked Sep 19, 2026
5Partial evidenceNew York, NY, United StatesHQ checked Sep 19, 202651-20062 contacts →

Partial evidence

“Welcome to Cognitud, where purpose-driven consulting meets global impact.”

Source: RevenueBase Database · checked Sep 19, 2026
6Partial evidenceNew York, United StatesHQ checked Sep 19, 202651-20055 contacts →

Partial evidence

“Daggerwing Group is a Top-Ten rated global change consultancy*.”

Source: RevenueBase Database · checked Sep 19, 2026
7Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 202611-5047 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
8Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 202611-5043 contacts →

Indirect evidence

“Potential Energy Coalition is a Fast Company Most Innovative Nonprofit!”

Source: RevenueBase Database · checked Sep 19, 2026
9Strong evidenceNew York, NY, United StatesHQ checked Sep 19, 20261-1024 contacts →

Strong evidence

“A new media company focused on the biggest story of our time: climate change.”

Source: RevenueBase Database · checked Sep 19, 2026
10Partial evidenceNew York, NY, United StatesHQ checked Sep 19, 202611-5019 contacts →

Partial evidence

“Altanova is a sustainability firm with consulting and engineering capabilities.”

Source: RevenueBase Database · checked Sep 19, 2026
11Strong evidenceNew York, NY, United StatesHQ checked Sep 19, 202611-5012 contacts →

Strong evidence

Climate Nexus was a strategic communications group dedicated to highlighting the wide-ranging impacts of climate change and clean energy solutions in the United States.”

Source: RevenueBase Database · checked Sep 19, 2026
12Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 20261-1012 contacts →

Indirect evidence

“TJBauman, LLC is a NYC sustainable development strategy and communications firm specializing in the market opportunities for advancing positive social impact and regenerative…”

Source: RevenueBase Database · checked Sep 19, 2026
13Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 20261-1011 contacts →

Indirect evidence

“Ganey Science is a small business enterprise based in New York.”

Source: RevenueBase Database · checked Sep 19, 2026
14Strong evidenceNew York, NY, United StatesHQ checked Sep 19, 20261-1010 contacts →

Strong evidence

“Parameter Climate is a unique advisory firm whose mission is to help the global economy manage the increasingly impactful risks of climate change by creating a scalable, efficient…”

Source: RevenueBase Database · checked Sep 19, 2026
15Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 202651-20010 contacts →

Indirect evidence

“HydroTech Environmental Engineering and Geology, DPC, is a specialized engineering and consultancy firm that offers comprehensive, integrated services across the Water…”

Source: RevenueBase Database · checked Sep 19, 2026
16Partial evidenceNew York, NY, United StatesHQ checked Sep 19, 20261-1010 contacts →

Partial evidence

“The Bassiouni Group (TBG) is a global consulting firm.”

Source: RevenueBase Database · checked Sep 19, 2026
17Partial evidenceNew York, NY, United StatesHQ checked Sep 19, 20261-109 contacts →

Partial evidence

“An environmental consulting and construction management company providing an all-encompassing package to carry your projects to the next level.”

Source: RevenueBase Database · checked Sep 19, 2026
18Partial evidenceNew York, NY, United StatesHQ checked Sep 19, 202611-508 contacts →

Partial evidence

“WeatherBELL Analytics LLC is a meteorological consulting firm that assists weather sensitive businesses to better manage their weather risk.”

Source: RevenueBase Database · checked Sep 19, 2026
19Partial evidenceNew York, NY, United StatesHQ checked Sep 19, 20261-106 contacts →

Partial evidence

“We are a boutique global sustainability and climate advisory practice with two main focuses: Driving companies to build best-in-class business models within an ESG construct…”

Source: RevenueBase Database · checked Sep 19, 2026
20Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 202611-506 contacts →

Indirect evidence

“Azuri is a boutique sustainability consultancy supporting organizations to innovate, build resilience, and create long-term value within planetary and societal boundaries.”

Source: RevenueBase Database · checked Sep 19, 2026
21Indirect evidenceNew York, United StatesHQ checked Sep 19, 20261-106 contacts →

Indirect evidence

“At MILE we focus on an integrative and collaborative approach towards advisory and business development services.”

Source: RevenueBase Database · checked Sep 19, 2026
22Partial evidenceNew York, NY, United StatesHQ checked Sep 19, 20261-105 contacts →

Partial evidence

“KO2 Consulting provides strategic energy consultant services for government agencies, non- profit organizations and private companies to achieve organizational energy performance…”

Source: RevenueBase Database · checked Sep 19, 2026
23Indirect evidenceNew York, NY, United StatesHQ checked Sep 19, 20261-105 contacts →

Indirect evidence

“We are trusted advisors and consultants who operate at the intersection of technical, financial, and legal matters for sustainable and resilient infrastructure and built…”

Source: RevenueBase Database · checked Sep 19, 2026
24Partial evidenceNew York, United StatesHQ checked Sep 19, 20261-105 contacts →

Partial evidence

“Redwood is a communications consultancy created to exclusively serve climate tech companies and organizations and expedite the decarbonization of the global economy.”

Source: RevenueBase Database · checked Sep 19, 2026

Showing 24 of 108 climate change consulting companies based in New York, United States

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Climate change consulting companies based in New York, United States at a glance

As of Sep 19, 2026
54.3%Verified-email coverage
22.3Average contacts per company
1-10Median size (employees)
100.0%Largest-city concentration · New York
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
78
11-50
18
51-200
11
1,001-5,000
1

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 108 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 change consulting companies, 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 New York, United States whose own description of what they do matches “climate change consulting companies”. 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 change consulting companies), 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 change consulting companies, and records with no verified work email. Companies headquartered outside New York 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, 1,306 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.

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 change consulting companies, 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 change consulting companies are there based in New York, United States?

RevenueBase identified 108 climate change consulting companies headquartered in New York, 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?

Environmental Defense Fund, headquartered in New York, tops this list with the largest team on record.

Which city has the most climate change consulting companies?

New York leads with 108 headquartered companies, followed by Washington (72) and Houston (63).

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 1,306 verified decision-maker contacts tracked across these 108 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.