Company lists · Data refreshed October 2026

Top 25 Commercial energy efficiency companies based in the United States

RevenueBase identified 2,725 company matches for commercial energy efficiency companies associated with the United States as of October 2026 and tracks 48,815 professional contacts across them, including 20,173 with verified work emails. New York is the largest hub.

This list covers company matches for commercial energy efficiency companies 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 October 10, 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 Oct 10, 2026 How this list was built
2,725Companies
48,815Contacts tracked
20,173Verified emails
Explore this list → Free signup · no credit card · 500 free credits

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

Ranked by team size
Top 25 of 2,725 company matches for commercial energy efficiency companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 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 matchSeattle, WA, United StatesHQ recorded Oct 10, 20261,001-5,0002,293 contacts →

Exact match

“We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2Exact matchAustin, TX, United StatesHQ recorded Oct 10, 20261,001-5,0002,206 contacts →

Exact match

“CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3Exact matchFramingham, MA, United StatesHQ recorded Oct 10, 20261,001-5,0001,513 contacts →

Exact match

“Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4Exact matchDublin, OH, United StatesHQ recorded Oct 10, 20261,001-5,0001,435 contacts →

Exact match

“IGS Energy has been a trusted energy advisor since 1989, growing into one of the nation’s top energy retailers.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5Exact matchLehi, UT, United StatesHQ recorded Oct 10, 20261,001-5,000912 contacts →

Exact match

“LGCY Power is committed to changing the way the world produces power.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6Exact matchHouston, TX, United StatesHQ recorded Oct 10, 2026501-1,000770 contacts →

Exact match

“Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7Exact matchPhoenix, AZ, United StatesHQ recorded Oct 10, 20261,001-5,000666 contacts →

Exact match

“Climatec has been making buildings safer, more comfortable and efficient for over 40 years.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8Exact matchEdison, NJ, United StatesHQ recorded Oct 10, 20261,001-5,000658 contacts →

Exact match

“Albireo Energy is a leading independent building controls and energy services provider recognized by customers for creating intelligent, high-performance buildings.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9Exact matchCharlotte, NC, United StatesHQ recorded Oct 10, 2026201-500606 contacts →

Exact match

“Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10Exact matchCarmel, IN, United StatesHQ recorded Oct 10, 2026201-500487 contacts →

Exact match

“ACES is a nationwide energy management company that helps its clients buy, sell, and manage the complexity of the U.S.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11Exact matchWestborough, MA, United StatesHQ recorded Oct 10, 2026201-500479 contacts →

Exact match

“NORESCO, an OPTERRA company, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12Exact matchSt. Rose, LA, United StatesHQ recorded Oct 10, 2026501-1,000433 contacts →

Exact match

“PosiGen is the nation's leading residential solar and energy efficiency provider.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13Exact matchPhoenix, MO, United StatesHQ recorded Oct 10, 2026501-1,000403 contacts →

Exact match

“Veregy is an award-winning NAESCO-Accredited decarbonization company focusing on accelerating and simplifying the Energy Transition.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14Exact matchShelton, CT, United StatesHQ recorded Oct 10, 2026201-500380 contacts →

Exact match

“Budderfly is redefining how energy efficiency, resilience, and grid participation can work together across America’s commercial sector.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15Exact matchMedford, MA, United StatesHQ recorded Oct 10, 2026201-500369 contacts →

Exact match

“At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16Exact matchPark Ridge, NJ, United StatesHQ recorded Oct 10, 2026201-500360 contacts →

Exact match

“National Utility Service, Inc.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17Exact matchGaithersburg, MD, United StatesHQ recorded Oct 10, 2026201-500329 contacts →

Exact match

“Boland is the leading commercial HVAC systems, services, and building energy solutions provider in the DC metro area.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18Exact matchPortland, OR, United StatesHQ recorded Oct 10, 2026201-500301 contacts →

Exact match

“At Cascade Energy, we believe in better.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19Exact matchSmithtown, NY, United StatesHQ recorded Oct 10, 2026201-500267 contacts →

Exact match

“Lane Valente Industries offers a broad range of solutions that help multi-site organizations reduce costs through energy reduction, facility maintenance and value engineering.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20Exact matchFort Washington, PA, United StatesHQ recorded Oct 10, 2026201-500261 contacts →

Exact match

“CMC Energy Services is a woman-owned full-service energy efficiency company with nearly 50 years of experience delivering value-based energy conservation services.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21Exact matchPittsburgh, PA, United StatesHQ recorded Oct 10, 20261,001-5,000258 contacts →

Exact match

“Direct Energy Business is part of a leading energy and energy-related services provider that is focused on helping customers make their businesses better.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22Exact matchNewark, NJ, United StatesHQ recorded Oct 10, 2026201-500248 contacts →

Exact match

“Lime Energy is building a new energy future.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23Exact matchHouston, TX, United StatesHQ recorded Oct 10, 2026201-500231 contacts →

Exact match

“At Mantis Innovation, our experts provide data-driven, consultative services designed to optimize your facility, sustainability, and energy management strategies, while ultimately…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24Exact matchDenver, CO, United StatesHQ recorded Oct 10, 2026201-500228 contacts →

Exact match

“Tolin Mechanical is a Leading Energy & Commercial HVAC Services Company.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25Exact matchDetroit, MI, United StatesHQ recorded Oct 10, 202651-200222 contacts →

Exact match

“Walker-Miller Energy Services (Walker-Miller), one of the largest African American and woman owned energy efficiency companies in the United States, changes lives through energy.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase

Showing 25 of 2,725 commercial energy efficiency companies based in the United States

See the full list, filter by size, metro and specialty, and access 20,173 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

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

As of Oct 10, 2026
41.3%Verified-email coverage
17.9Average contacts per company
11-50Median size (employees)
3.4%Largest-city concentration · New York
Oct 10, 2026Page data refreshed

Companies by employee count

1-10
1,311
11-50
990
51-200
311
201-500
67
501-1,000
21
1,001-5,000
16
5,001-10,000
3
10001+
4

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 2,725 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 “commercial energy efficiency companies” 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 20,173 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 October 10, 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 “commercial energy efficiency companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial energy efficiency companies are there based in the United States?

RevenueBase identified 2,725 company matches for commercial energy efficiency companies associated with the United States as of October 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?

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

Which city has the most commercial energy efficiency companies?

New York leads with 92 company records, followed by Houston (70) and Atlanta (43).

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 20,173 professional contacts with verified work emails tracked across these 2,725 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 October 10, 2026.

Ready to reach these companies? Verified emails and direct dials for all 2,725 commercial energy efficiency companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

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.