Company lists · Data refreshed September 2026

Top 25 Cleantech companies based in New York, United States

Name: Cleantech companies based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 140 companies tracked

RevenueBase identified 140 cleantech companies headquartered in New York, United States as of September 2026 and tracks 2,138 professional contacts across them, including 1,135 with verified work emails. New York is the largest hub.

This list covers cleantech 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

140Companies

2,138Contacts tracked

1,135Verified emails

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The 25 largest cleantech companies based in New York, United States

Ranked by team size

Top 25 of 140 cleantech 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 cleantech 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	Bright Power	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	205 contacts →
	Indirect evidence “Bright Power is a leading provider of energy efficiency and decarbonization solutions for the real estate industry.” Source: RevenueBase Database · checked Sep 19, 2026
2	Madison Energy Infrastructure	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	150 contacts →
	Indirect evidence “Madison Energy Infrastructure is on a mission to modernize energy for industry and communities where it matters most.” Source: RevenueBase Database · checked Sep 19, 2026
3	Luminace	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	126 contacts →
	Indirect evidence “Luminace is one of the largest fully integrated decarbonization-as-a-service solution providers in North America, sponsoring accessible, reliable and renewable energy…” Source: RevenueBase Database · checked Sep 19, 2026
4	Environ Energy	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	98 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
5	Euclid Power	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	85 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
6	Codegreen	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	72 contacts →
	Indirect evidence “CodeGreen is a leading national sustainability and energy efficiency consulting firm.” Source: RevenueBase Database · checked Sep 19, 2026
7	Onyx Renewables	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	67 contacts →
	Indirect evidence “Onyx Renewables is a leading provider of predictable, affordable clean energy solutions nationwide.” Source: RevenueBase Database · checked Sep 19, 2026
8	Common Energy	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	65 contacts →
	Indirect evidence “Common Energy works with developers across the country to activate their clean energy projects and maximize ROI.” Source: RevenueBase Database · checked Sep 19, 2026
9	Sealed	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	54 contacts →
	Indirect evidence “Sealed is a climate tech company on a mission to stop home energy waste by enabling contractors to install more home weatherization and electrification projects and grow their…” Source: RevenueBase Database · checked Sep 19, 2026
10	INF Associates	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	51 contacts →
	Indirect evidence “INF Associates is an energy solutions integrator providing turnkey solutions in decarbonization of transportation and buildings.” Source: RevenueBase Database · checked Sep 19, 2026
11	Energy Infrastructure Partners LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	49 contacts →
	Indirect evidence “Founded in 2011, Energy Infrastructure Partners (EIP) began with a clear premise: utilities, governments, and large energy users need a partner who is as committed to technical…” Source: RevenueBase Database · checked Sep 19, 2026
12	Highmark Building Efficiency	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	43 contacts →
	Indirect evidence “HIGHMARK’s mission is to support building sustainability, electrification, decarbonization and cost savings.” Source: RevenueBase Database · checked Sep 19, 2026
13	Watchwire By Tango	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	39 contacts →
	Indirect evidence “Tango Energy & Sustainability (fka WatchWire) is a sustainability and energy management software-as-a-service (EMSaaS) provider.” Source: RevenueBase Database · checked Sep 19, 2026
14	Urban Green Council	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	38 contacts →
	Indirect evidence “Urban Green Council's mission is to decarbonize buildings for healthy and resilient communities.” Source: RevenueBase Database · checked Sep 19, 2026
15	Carbonquest	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	36 contacts →
	Indirect evidence “Leading the QUEST for decarbonization by providing urban building owners advanced technologies and solutions that ENABLE acceleration of global carbon reduction NOW CarbonQuest…” Source: RevenueBase Database · checked Sep 19, 2026
16	Apx, INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	35 contacts →
	Indirect evidence “APX's mission is to empower the world's transition to sustainable energy.” Source: RevenueBase Database · checked Sep 19, 2026
17	Convalt Energy	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	29 contacts →
	Indirect evidence “Convalt Energy (CE) is a portfolio company of ACO Investment Group.” Source: RevenueBase Database · checked Sep 19, 2026
18	Catalyst Power Holdings LLC	Indirect evidence	New York, United StatesHQ checked Sep 19, 2026	11-50	27 contacts →
	Indirect evidence “Catalyst Power develops novel and highly repeatable energy supply options for commercial and industrial end-users of all sizes.” Source: RevenueBase Database · checked Sep 19, 2026
19	Firstservice Energy	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “FirstService Energy is the energy management and advisory affiliate of FirstService Residential the largest manager of residential communities in North America.” Source: RevenueBase Database · checked Sep 19, 2026
20	Comity	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “We’re on a mission to improve the reliability, transparency, and efficiency of our energy systems, fostering a future with sustainable and abundant energy.” Source: RevenueBase Database · checked Sep 19, 2026
21	Centennial	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “Founded in 2014, Centennial is an energy development company specializing in the deployment of solar and battery energy storage projects at commercial and industrial properties.” Source: RevenueBase Database · checked Sep 19, 2026
22	Altanova	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	19 contacts →
	Indirect evidence “Altanova is a sustainability firm with consulting and engineering capabilities.” Source: RevenueBase Database · checked Sep 19, 2026
23	Blue Orb, LP	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “At Blue Orb, LP, we develop, implement, and manage renewable energy projects, unlocking value for investors and delivering transformative benefits to communities.” Source: RevenueBase Database · checked Sep 19, 2026
24	Thalo Labs	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1-10	15 contacts →
	Indirect evidence “Thalo Labs: Climate Tech for the World We Live In” Source: RevenueBase Database · checked Sep 19, 2026
25	Solo Energy & Electrical	Indirect evidence	New York, United StatesHQ checked Sep 19, 2026	11-50	15 contacts →
	Indirect evidence “SOLO is a sustainable energy service company specializing in energy efficiency, electrification, and renewable solutions.” 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: cleantech 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 cleantech companies.
Partial evidence: Its own public description names part of cleantech companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cleantech 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 140 cleantech companies based in New York, United States

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Cleantech companies based in New York, United States at a glance

As of Sep 19, 2026

53.1%Verified-email coverage

15.3Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

10001+

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 140 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 cleantech 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 “cleantech 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 cleantech 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 cleantech 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, 1,135 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.

Cleantech companies by metro in the United States

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 cleantech 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 cleantech companies are there based in New York, United States?

RevenueBase identified 140 cleantech 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?

Bright Power, headquartered in New York, tops this list with the largest team on record.

Which city has the most cleantech companies?

New York leads with 140 headquartered companies, followed by Houston (117) and San Francisco (79).

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 1,135 verified decision-maker contacts tracked across these 140 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.