Company lists · Data refreshed October 2026

Top 25 Commercial energy efficiency contractors based in the United States

Name: Commercial energy efficiency contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 2,181 companies tracked

RevenueBase identified 2,181 company matches for commercial energy efficiency contractors associated with the United States as of October 2026 and tracks 29,426 professional contacts across them, including 11,127 with verified work emails. New York is the largest hub.

This list covers company matches for commercial energy efficiency contractors 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

2,181Companies

29,426Contacts tracked

11,127Verified emails

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

Ranked by team size

Top 25 of 2,181 company matches for commercial energy efficiency contractors 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Oct 10, 2026	1,001-5,000	2,206 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
2	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,513 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
3	Noresco	Exact match	Westborough, MA, United StatesHQ recorded Oct 10, 2026	201-500	479 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
4	Budderfly	Exact match	Shelton, CT, United StatesHQ recorded Oct 10, 2026	201-500	380 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
5	Homeworks Energy, INC	Exact match	Medford, MA, United StatesHQ recorded Oct 10, 2026	201-500	369 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
6	Cascade Energy	Exact match	Portland, OR, United StatesHQ recorded Oct 10, 2026	201-500	301 contacts →
	Exact match “At Cascade Energy, we believe in better.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7	Lane Valente Industries	Exact match	Smithtown, NY, United StatesHQ recorded Oct 10, 2026	201-500	267 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
8	CMC Energy Services	Exact match	Fort Washington, PA, United StatesHQ recorded Oct 10, 2026	201-500	261 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
9	Lime Energy	Exact match	Newark, NJ, United StatesHQ recorded Oct 10, 2026	201-500	248 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
10	Zodiac	Exact match	St. Louis, MO, United StatesHQ recorded Oct 10, 2026	n/a	230 contacts →
	Exact match “Zodiac, Inc.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11	Walker-Miller Energy Services	Exact match	Detroit, MI, United StatesHQ recorded Oct 10, 2026	51-200	222 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
12	PEG	Exact match	Fairfax, VA, United StatesHQ recorded Oct 10, 2026	201-500	216 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 10, 2026 · View company records in RevenueBase
13	Frontier Energy, INC	Exact match	Pleasanton, CA, United StatesHQ recorded Oct 10, 2026	51-200	213 contacts →
	Exact match “Frontier Energy is a professional services firm that excels in market transformation.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	Dalkia Energy Solutions	Exact match	Beverly, MA, United StatesHQ recorded Oct 10, 2026	201-500	213 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 10, 2026 · View company records in RevenueBase
15	Energy Management Collaborative EMC	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 10, 2026	201-500	207 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 10, 2026 · View company records in RevenueBase
16	DCO Energy, LLC	Exact match	Mays Landing, NJ, United StatesHQ recorded Oct 10, 2026	201-500	205 contacts →
	Exact match “DCO Energy, LLC is an independent energy development company specializing in the development, engineering, construction, start up, commissioning, operation, maintenance and…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	Bright Power	Exact match	New York, NY, United StatesHQ recorded Oct 10, 2026	51-200	201 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 10, 2026 · View company records in RevenueBase
18	AMA Group	Exact match	New York, NY, United StatesHQ recorded Oct 10, 2026	201-500	200 contacts →
	Exact match “As of November of 2025, AMA Group has merged with CMTA!” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19	EPC Services Company	Exact match	Billings, MT, United StatesHQ recorded Oct 10, 2026	201-500	191 contacts →
	Exact match “EPC Services Company (EPCS) has grown into one of the largest Engineer-Procure-Construct firms in the U.S, delivering comprehensive EPC execution, electrical testing, and…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20	Mcclure Company	Exact match	Harrisburg, PA, United StatesHQ recorded Oct 10, 2026	201-500	177 contacts →
	Exact match “Headquartered in Harrisburg, Pennsylvania, McClure Company is one of the mid-Atlantic's largest, fully integrated mechanical construction, engineering, maintenance and energy…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	Syserco, INC	Exact match	Fremont, CA, United StatesHQ recorded Oct 10, 2026	51-200	172 contacts →
	Exact match “Syserco is an industry leader delivering Energy Management Solutions and Services to commercial and industrial facilities ranging from K-12 Schools, to High Rises, to…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22	Hill York	Exact match	Dania Beach, FL, United StatesHQ recorded Oct 10, 2026	201-500	168 contacts →
	Exact match “Hill York is a full service contractor that offers a full array of energy efficient air-conditioning services from concept to completion, maintenance to repair and everything in…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23	Elect Energy, INC	Exact match	Plano, TX, United StatesHQ recorded Oct 10, 2026	n/a	166 contacts →
	Exact match “We're your advocates.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	Consol	Exact match	Sacramento, CA, United StatesHQ recorded Oct 10, 2026	n/a	156 contacts →
	Exact match “ConSol is a technical advisory and training organization with expertise in building energy code, energy modeling, program management, technology adoption, and certification…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25	Concord Engineering Group, INC	Exact match	Voorhees, NJ, United StatesHQ recorded Oct 10, 2026	51-200	148 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “commercial energy efficiency contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 2,181 commercial energy efficiency contractors based in the United States

See the full list, filter by size, metro and specialty, and access 11,127 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Oct 10, 2026

37.8%Verified-email coverage

13.5Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · New York

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

1,097

11-50

796

51-200

228

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 2,181 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 contractors” 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 11,127 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.

Commercial energy efficiency contractors by metro

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 contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 2,181 company matches for commercial energy efficiency contractors 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?

Clearesult 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 contractors?

New York leads with 69 company records, followed by Houston (41) and Atlanta (36).

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 11,127 professional contacts with verified work emails tracked across these 2,181 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.

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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.