Company lists · Data refreshed September 2026

Top 25 Climate technology companies based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 760 companies tracked

RevenueBase identified 760 climate technology companies headquartered in the United States as of September 2026 and tracks 29,698 professional contacts across them, including 13,860 with verified work emails. New York is the largest hub.

This list covers climate technology companies headquartered in the 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

760Companies

29,698Contacts tracked

13,860Verified emails

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The 25 largest climate technology companies based in the United States

Ranked by team size

Top 25 of 760 climate technology companies based in the 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 technology 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Carrier	Strong evidence	Palm Beach Gardens, FL, United StatesHQ checked Sep 19, 2026	10001+	7,665 contacts →
	Strong evidence “Carrier is a global leader in intelligent climate and energy solutions, pioneering sustainable innovations in climate technologies.” Source: RevenueBase Database · checked Sep 19, 2026
2	Copeland	Partial evidence	St. Louis, MO, United StatesHQ checked Sep 19, 2026	10001+	3,995 contacts →
	Partial evidence “Copeland is a global leader in compression technologies and controls solutions, with more than 200 million installations worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
3	Mckinstry	Partial evidence	Seattle, WA, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,213 contacts →
	Partial evidence “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Source: RevenueBase Database · checked Sep 19, 2026
4	Clearesult	Indirect evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,121 contacts →
	Indirect evidence “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Source: RevenueBase Database · checked Sep 19, 2026
5	Franklin Energy	Indirect evidence	Port Washington, WI, United StatesHQ checked Sep 19, 2026	1,001-5,000	838 contacts →
	Indirect evidence “Franklin Energy delivers end-to-end sustainability solutions through a portfolio of intelligent products and services that lower energy costs, reduce carbon and waste, and grow…” Source: RevenueBase Database · checked Sep 19, 2026
6	Energy Solutions	Partial evidence	Oakland, CA, United StatesHQ checked Sep 19, 2026	201-500	772 contacts →
	Partial evidence “Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.” Source: RevenueBase Database · checked Sep 19, 2026
7	Resource Innovations	Indirect evidence	Half Moon Bay, CA, United StatesHQ checked Sep 19, 2026	501-1,000	733 contacts →
	Indirect evidence “Resource Innovations (RI) is an energy transformation firm.” Source: RevenueBase Database · checked Sep 19, 2026
8	Chromalox	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 19, 2026	1,001-5,000	635 contacts →
	Indirect evidence “When industrial operations depend on heat that simply cannot fail, Chromalox brings unmatched technical knowledge and high‑performance electric heating solutions that stand the…” Source: RevenueBase Database · checked Sep 19, 2026
9	GTI Energy	Indirect evidence	Des Plaines, IL, United StatesHQ checked Sep 19, 2026	201-500	513 contacts →
	Indirect evidence “For more than eight decades, GTI Energy has contributed to the strengthening of energy systems and the communities they serve.” Source: RevenueBase Database · checked Sep 19, 2026
10	Veregy	Indirect evidence	Phoenix, MO, United StatesHQ checked Sep 19, 2026	501-1,000	383 contacts →
	Indirect evidence “Veregy is an award-winning NAESCO-Accredited decarbonization company focusing on accelerating and simplifying the Energy Transition.” Source: RevenueBase Database · checked Sep 19, 2026
11	VEIC	Indirect evidence	Winooski, VT, United StatesHQ checked Sep 19, 2026	201-500	326 contacts →
	Indirect evidence “For 40 years, VEIC has helped energy leaders nationwide meet their clean energy goals.” Source: RevenueBase Database · checked Sep 19, 2026
12	3degrees Group, INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	201-500	324 contacts →
	Partial evidence “3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Source: RevenueBase Database · checked Sep 19, 2026
13	Cimarron	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	501-1,000	306 contacts →
	Partial evidence “With decades of operating history and innovation across our trusted brands, Cimarron provides technology-driven emissions management solutions for the global energy system.” Source: RevenueBase Database · checked Sep 19, 2026
14	Aeroseal	Partial evidence	Miamisburg, OH, United StatesHQ checked Sep 19, 2026	51-200	215 contacts →
	Partial evidence “Aeroseal is a climate tech company on a mission - reduce the world's carbon emissions by 1 gigaton annually.” Source: RevenueBase Database · checked Sep 19, 2026
15	Energy & Environmental Research Center	Indirect evidence	Grand Forks, ND, United StatesHQ checked Sep 19, 2026	201-500	213 contacts →
	Indirect evidence “The Energy & Environmental Research Center (EERC) is recognized as one of the world's leading developers of cleaner, more efficient energy to power the world and environmental…” Source: RevenueBase Database · checked Sep 19, 2026
16	Dalkia Energy Solutions	Indirect evidence	Beverly, MA, United StatesHQ checked Sep 19, 2026	201-500	210 contacts →
	Indirect evidence “Dalkia Energy Solutions, a subsidiary of the EDF (Électricité de France) Group, is a national leader in energy efficiency and sustainability for commercial, industrial, and…” Source: RevenueBase Database · checked Sep 19, 2026
17	Center For Energy And Environment	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 19, 2026	51-200	203 contacts →
	Indirect evidence “CEE is a community-based clean energy nonprofit with special expertise in energy efficiency that stretches back 40 years.” Source: RevenueBase Database · checked Sep 19, 2026
18	Anew Climate	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	200 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
19	Ever-Green Energy	Indirect evidence	Saint Paul, MN, United StatesHQ checked Sep 19, 2026	201-500	191 contacts →
	Indirect evidence “Ever-Green Energy is a recognized leader in energy conservation and the use of renewable energy.” Source: RevenueBase Database · checked Sep 19, 2026
20	Carbon Direct	Partial evidence	New York, United StatesHQ checked Sep 19, 2026	51-200	172 contacts →
	Partial evidence “Carbon Direct is a trusted energy and climate solutions company that combines world-class scientific expertise, technical rigor, and market insights to help clients achieve their…” Source: RevenueBase Database · checked Sep 19, 2026
21	Clean AIR Task Force	Partial evidence	Boston, MA, United StatesHQ checked Sep 19, 2026	51-200	167 contacts →
	Partial evidence “CATF advocates for the change in technologies and policies needed to get to a zero-emissions, high-energy planet at an affordable cost.” Source: RevenueBase Database · checked Sep 19, 2026
22	Breakthrough Energy	Indirect evidence	Kirkland, United StatesHQ checked Sep 19, 2026	51-200	159 contacts →
	Indirect evidence “Breakthrough Energy backs companies developing the next generation of clean energy solutions.” Source: RevenueBase Database · checked Sep 19, 2026
23	Cleanchoice Energy	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	155 contacts →
	Partial evidence “CleanChoice Energy is a cleantech company that empowers people and businesses to easily access climate solutions.” Source: RevenueBase Database · checked Sep 19, 2026
24	Slipstream	Indirect evidence	Madison, WI, United StatesHQ checked Sep 19, 2026	51-200	146 contacts →
	Indirect evidence “We're a nonprofit headquartered in Madison, WI with an office in Chicago and remote staff across the U.S.” Source: RevenueBase Database · checked Sep 19, 2026
25	Connectm Technology Solutions	Partial evidence	Marlborough, MA, United StatesHQ checked Sep 19, 2026	51-200	131 contacts →
	Partial evidence “ConnectM is a clean energy technology and solutions provider for residential and light commercial buildings and all-electric original equipment manufacturers with a proprietary…” 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 technology companies. 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 technology companies.
Partial evidence: Its own public description names part of climate technology companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name climate technology companies. 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 25 of 760 climate technology companies based in the United States

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Climate technology companies based in the United States at a glance

As of Sep 19, 2026

46.7%Verified-email coverage

39.1Average contacts per company

1-10Median size (employees)

5.8%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

436

11-50

212

51-200

201-500

501-1,000

1,001-5,000

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 760 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 technology 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 the United States whose own description of what they do matches “climate technology 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 technology 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 technology companies, and records with no verified work email. Companies headquartered outside United States 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, 13,860 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 technology companies by metro

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 technology 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 technology companies are there based in the United States?

RevenueBase identified 760 climate technology companies headquartered in the 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?

Carrier, headquartered in Palm Beach Gardens, tops this list with the largest team on record.

Which city has the most climate technology companies?

New York leads with 44 headquartered companies, followed by Houston (42) and San Francisco (25).

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 13,860 verified decision-maker contacts tracked across these 760 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.