Company lists · Data refreshed September 2026

Top 25 Home energy efficiency companies based in the United States

Name: Home energy efficiency 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 16, 2026 1,285 companies tracked

RevenueBase identified 1,285 home energy efficiency companies headquartered in the United States as of September 2026 and tracks 17,824 professional contacts across them, including 6,091 with verified work emails. New York is the largest hub.

This list covers home energy efficiency 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 16, 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 16, 2026 86% judged on-target in blind review

1,285Companies

17,824Contacts tracked

6,091Verified emails

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The 25 largest home energy efficiency companies based in the United States

Ranked by team size

Top 25 of 1,285 home energy efficiency companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to home energy efficiency 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	Clearesult	Strong evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,121 contacts →
	Strong evidence “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Source: RevenueBase Database · checked Sep 16, 2026
2	Sunnova Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	501-1,000	906 contacts →
	Partial evidence “Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…” Source: RevenueBase Database · checked Sep 16, 2026
3	Palmetto	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 16, 2026	201-500	539 contacts →
	Partial evidence “Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.” Source: RevenueBase Database · checked Sep 16, 2026
4	Posigen	Strong evidence	St. Rose, LA, United StatesHQ checked Sep 16, 2026	501-1,000	507 contacts →
	Strong evidence “PosiGen is the nation's leading residential solar and energy efficiency provider.” Source: RevenueBase Database · checked Sep 16, 2026
5	Budderfly	Strong evidence	Shelton, CT, United StatesHQ checked Sep 16, 2026	201-500	366 contacts →
	Strong evidence “Budderfly is redefining how energy efficiency, resilience, and grid participation can work together across America’s commercial sector.” Source: RevenueBase Database · checked Sep 16, 2026
6	Homeworks Energy, INC	Strong evidence	Medford, MA, United StatesHQ checked Sep 16, 2026	201-500	356 contacts →
	Strong evidence “At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.” Source: RevenueBase Database · checked Sep 16, 2026
7	Everlight Solar	Partial evidence	Verona, WI, United StatesHQ checked Sep 16, 2026	51-200	294 contacts →
	Partial evidence “Everlight Solar provides homeowners with simple and affordable clean energy.” Source: RevenueBase Database · checked Sep 16, 2026
8	CMC Energy Services	Strong evidence	Fort Washington, PA, United StatesHQ checked Sep 16, 2026	201-500	252 contacts →
	Strong evidence “CMC Energy Services is a woman-owned full-service energy efficiency company with nearly 50 years of experience delivering value-based energy conservation services.” Source: RevenueBase Database · checked Sep 16, 2026
9	Lime Energy	Partial evidence	Newark, NJ, United StatesHQ checked Sep 16, 2026	201-500	233 contacts →
	Partial evidence “Lime Energy is building a new energy future.” Source: RevenueBase Database · checked Sep 16, 2026
10	Dalkia Energy Solutions	Strong evidence	Beverly, MA, United StatesHQ checked Sep 16, 2026	201-500	210 contacts →
	Strong 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 16, 2026
11	Bright Power	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	205 contacts →
	Strong evidence “Bright Power is a leading provider of energy efficiency and decarbonization solutions for the real estate industry.” Source: RevenueBase Database · checked Sep 16, 2026
12	HOP Energy LLC	Partial evidence	Rye Brook, NY, United StatesHQ checked Sep 16, 2026	501-1,000	201 contacts →
	Partial evidence “About HOP Energy provides residential and commercial energy services from Vermont to Delaware.” Source: RevenueBase Database · checked Sep 16, 2026
13	Energy Management Collaborative EMC	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 16, 2026	201-500	193 contacts →
	Strong evidence “EMC manages and scales turnkey energy efficiency solutions for Fortune 500 clients across their North American portfolios.” Source: RevenueBase Database · checked Sep 16, 2026
14	Noco Energy Corp	Partial evidence	Tonawanda, NY, United StatesHQ checked Sep 16, 2026	201-500	176 contacts →
	Partial evidence “With a rich history spanning more than 90 years, NOCO is a leading full-service energy company servicing customers across Upstate New York.” Source: RevenueBase Database · checked Sep 16, 2026
15	Solar Energy Partners	Partial evidence	Modesto, CA, United StatesHQ checked Sep 16, 2026	51-200	172 contacts →
	Partial evidence “Our mission is to bring clean energy, cost savings, and peace of mind to every homeowner in the world.” Source: RevenueBase Database · checked Sep 16, 2026
16	ZEO Energy	Partial evidence	Port St Lucie, FL, United StatesHQ checked Sep 16, 2026	201-500	159 contacts →
	Partial evidence “ZEO Energy is a nationwide clean energy company helping homeowners take control of their power, their bills, and their future.” Source: RevenueBase Database · checked Sep 16, 2026
17	RISE	Strong evidence	Cranston, RI, United StatesHQ checked Sep 16, 2026	201-500	151 contacts →
	Strong evidence “RISE is a pioneer in the delivery of turnkey energy-efficiency services for residential, commercial and industrial facilities.” Source: RevenueBase Database · checked Sep 16, 2026
18	Baker Home Energy	Indirect evidence	Escondido, CA, United StatesHQ checked Sep 16, 2026	201-500	133 contacts →
	Indirect evidence “We’ve made some exciting changes here at Baker and we want you to be the first to know.” Source: RevenueBase Database · checked Sep 16, 2026
19	Elevation	Strong evidence	Chandler, AZ, United StatesHQ checked Sep 16, 2026	201-500	133 contacts →
	Strong evidence “Elevation is one of the nation’s largest providers of residential solar, storage, energy efficiency, and energy intelligence technology providers.” Source: RevenueBase Database · checked Sep 16, 2026
20	Connectm Technology Solutions	Partial evidence	Marlborough, MA, United StatesHQ checked Sep 16, 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 16, 2026
21	Synergy Companies	Strong evidence	Fresno, CA, United StatesHQ checked Sep 16, 2026	501-1,000	124 contacts →
	Strong evidence “Synergy Companies is the largest energy services companies in California and provides a comprehensive approach to energy efficiency and environmental solutions in both the…” Source: RevenueBase Database · checked Sep 16, 2026
22	NY State Solar	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	201-500	119 contacts →
	Partial evidence “NY State Solar helps your friends and neighbors save on their energy bills – Our custom solar solutions are engineered from the ground-up, and every system that we install is…” Source: RevenueBase Database · checked Sep 16, 2026
23	Erus Energy	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 16, 2026	51-200	118 contacts →
	Partial evidence “Erus Energy helps building owners evaluate and finance investments in Solar Energy and other energy saving equipment.” Source: RevenueBase Database · checked Sep 16, 2026
24	Melink Corporation	Strong evidence	Milford, OH, United StatesHQ checked Sep 16, 2026	51-200	116 contacts →
	Strong evidence “We are a global provider of energy efficiency solutions for commercial buildings with five business offerings: HVAC Testing, Adjusting & Balancing, Intelli-Hood® Kitchen…” Source: RevenueBase Database · checked Sep 16, 2026
25	PSD	Strong evidence	Ithaca, NY, United StatesHQ checked Sep 16, 2026	51-200	112 contacts →
	Strong evidence “PSD is an energy efficiency services and technology company.” Source: RevenueBase Database · checked Sep 16, 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: home energy efficiency 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 home energy efficiency companies.
Partial evidence: Its own public description names part of home energy efficiency companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name home energy efficiency 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 1,285 home energy efficiency companies based in the United States

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Home energy efficiency companies based in the United States at a glance

As of Sep 16, 2026

34.2%Verified-email coverage

13.9Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

627

11-50

474

51-200

135

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 1,285 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 home energy efficiency 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 “home energy efficiency 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 home energy efficiency 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 home energy efficiency 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, 6,091 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 16, 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.

Home energy efficiency companies by metro

Home energy efficiency companies in New York26

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 home energy efficiency 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 home energy efficiency companies are there based in the United States?

RevenueBase identified 1,285 home energy efficiency 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?

Clearesult, headquartered in Austin, tops this list with the largest team on record.

Which city has the most home energy efficiency companies?

New York leads with 26 headquartered companies, followed by Denver (21) and Houston (19).

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 6,091 verified decision-maker contacts tracked across these 1,285 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 16, 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.