Company lists · Data refreshed October 2026

Top 25 Industrial energy efficiency companies based in the United States

RevenueBase identified 1,792 company matches for industrial energy efficiency companies associated with the United States as of October 2026 and tracks 35,559 professional contacts across them, including 14,514 with verified work emails. New York is the largest hub.

This list covers company matches for industrial 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 16, 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 16, 2026 How this list was built
1,792Companies
35,559Contacts tracked
14,514Verified emails
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The 25 largest industrial energy efficiency companies based in the United States

Ranked by team size
Top 25 of 1,792 company matches for industrial energy efficiency companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 16, 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 matchMenasha, WI, United StatesHQ recorded Oct 16, 20261,001-5,0002,979 contacts →

Exact match

“Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
2Exact matchAustin, TX, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
3Exact matchFramingham, MA, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
4Exact matchAnaheim, CA, United StatesHQ recorded Oct 16, 20261,001-5,000872 contacts →

Exact match

“Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
5Exact matchDoral, FL, United StatesHQ recorded Oct 16, 20261,001-5,000594 contacts →

Exact match

“SoEnergy is a global provider of "energy as a service", ensuring customized solutions for a diverse array of organizations and industries worldwide, such as mining, oil & gas…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
6Exact matchOklahoma City, OK, United StatesHQ recorded Oct 16, 2026501-1,000531 contacts →

Exact match

“Kimray is a global solutions partner in the energy industry.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
7Exact matchWestborough, MA, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
8Exact matchPhoenix, MO, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
9Exact matchIrvine, CA, United StatesHQ recorded Oct 16, 2026201-500387 contacts →

Exact match

“We are Trio – global energy and sustainability advisors.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
10Exact matchShelton, CT, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
11Exact matchHouston, TX, United StatesHQ recorded Oct 16, 2026n/a371 contacts →

Exact match

“Now IHI Energy Solutions, Inc, visit our page”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
12Exact matchPark Ridge, NJ, United StatesHQ recorded Oct 16, 2026201-500360 contacts →

Exact match

“National Utility Service, Inc.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
13Exact matchPortland, OR, United StatesHQ recorded Oct 16, 2026201-500301 contacts →

Exact match

“At Cascade Energy, we believe in better.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
14Exact matchFort Washington, PA, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
15Exact matchPittsburgh, PA, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
16Exact matchNewark, NJ, United StatesHQ recorded Oct 16, 2026201-500248 contacts →

Exact match

“Lime Energy is building a new energy future.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
18Exact matchDenver, CO, United StatesHQ recorded Oct 16, 2026201-500228 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
19Exact matchSan Leandro, CA, United StatesHQ recorded Oct 16, 2026201-500222 contacts →

Exact match

“Energy Recovery (Nasdaq: ERII) designs and manufactures world-class energy-saving technology for critical infrastructure that communities rely on every day, driving a more…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
20Exact matchDetroit, MI, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
21Exact matchFairfax, VA, United StatesHQ recorded Oct 16, 2026201-500216 contacts →

Exact match

“PEG presents a comprehensive capacity for the evaluation and understanding of a broad base of energy and environmental sustainability related programs, policies and initiatives.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
22Exact matchBeverly, MA, United StatesHQ recorded Oct 16, 2026201-500213 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
23Exact matchAtlanta, GA, United StatesHQ recorded Oct 16, 2026201-500212 contacts →

Exact match

“Clyde Industries, a subsidiary of Kadant Inc, headquartered in Atlanta, Georgia, is a leading provider of boiler efficiency solutions for the most demanding applications in the…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
24Exact matchMinneapolis, MN, United StatesHQ recorded Oct 16, 2026201-500207 contacts →

Exact match

“EMC manages and scales turnkey energy efficiency solutions for Fortune 500 clients across their North American portfolios.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
25Exact matchNew York, NY, United StatesHQ recorded Oct 16, 202651-200201 contacts →

Exact match

“Bright Power is a leading provider of energy efficiency and decarbonization solutions for the real estate industry.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase

Showing 25 of 1,792 industrial energy efficiency companies based in the United States

See the full list, filter by size, metro and specialty, and access 14,514 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Oct 16, 2026
40.8%Verified-email coverage
19.8Average contacts per company
11-50Median size (employees)
3.5%Largest-city concentration · New York
Oct 16, 2026Page data refreshed

Companies by employee count

1-10
849
11-50
659
51-200
201
201-500
49
501-1,000
12
1,001-5,000
13
5,001-10,000
2
10001+
5

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 1,792 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 “industrial 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 14,514 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 16, 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 “industrial energy efficiency companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 1,792 company matches for industrial 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?

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

Which city has the most industrial energy efficiency companies?

New York leads with 63 company records, followed by Houston (58) and Dallas (27).

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 14,514 professional contacts with verified work emails tracked across these 1,792 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 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 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.