Company lists · Data refreshed September 2026

Top 25 Industrial energy efficiency firms based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,766 companies tracked

RevenueBase identified 1,766 company matches for industrial energy efficiency firms associated with the United States as of September 2026 and tracks 28,519 professional contacts across them, including 12,573 with verified work emails. New York is the largest hub.

This list covers company matches for industrial energy efficiency firms 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 September 17, 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 Sep 17, 2026 How this list was built

1,766Companies

28,519Contacts tracked

12,573Verified emails

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The 25 largest industrial energy efficiency firms based in the United States

Ranked by team size

Top 25 of 1,766 company matches for industrial energy efficiency firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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 Sep 17, 2026	1,001-5,000	2,121 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 · Sep 17, 2026 · View company records in RevenueBase
2	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	1,383 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 · Sep 17, 2026 · View company records in RevenueBase
3	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	851 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 · Sep 17, 2026 · View company records in RevenueBase
4	Resource Innovations	Exact match	Half Moon Bay, CA, United StatesHQ recorded Sep 17, 2026	501-1,000	733 contacts →
	Exact match “Resource Innovations (RI) is an energy transformation firm.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Noresco	Exact match	Westborough, MA, United StatesHQ recorded Sep 17, 2026	201-500	481 contacts →
	Exact match “NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Sep 17, 2026	201-500	375 contacts →
	Exact match “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Budderfly	Exact match	Shelton, CT, United StatesHQ recorded Sep 17, 2026	201-500	366 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 · Sep 17, 2026 · View company records in RevenueBase
8	NUS Consulting Group	Exact match	Park Ridge, NJ, United StatesHQ recorded Sep 17, 2026	201-500	336 contacts →
	Exact match “National Utility Service, Inc.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Cascade Energy	Exact match	Portland, OR, United StatesHQ recorded Sep 17, 2026	201-500	288 contacts →
	Exact match “At Cascade Energy, we believe in better.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Lake Superior Consulting	Exact match	Duluth, MN, United StatesHQ recorded Sep 17, 2026	201-500	281 contacts →
	Exact match “We act as an extension of your team, combining deep energy expertise with seamless alignment to your processes to advance projects with confidence.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	CMC Energy Services	Exact match	Fort Washington, PA, United StatesHQ recorded Sep 17, 2026	201-500	252 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 · Sep 17, 2026 · View company records in RevenueBase
12	Lime Energy	Exact match	Newark, NJ, United StatesHQ recorded Sep 17, 2026	201-500	233 contacts →
	Exact match “Lime Energy is building a new energy future.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Energy Recovery, INC	Exact match	San Leandro, CA, United StatesHQ recorded Sep 17, 2026	201-500	219 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 · Sep 17, 2026 · View company records in RevenueBase
14	PEG	Exact match	Fairfax, VA, United StatesHQ recorded Sep 17, 2026	201-500	214 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 · Sep 17, 2026 · View company records in RevenueBase
15	Dalkia Energy Solutions	Exact match	Beverly, MA, United StatesHQ recorded Sep 17, 2026	201-500	210 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 · Sep 17, 2026 · View company records in RevenueBase
16	Clyde Industries	Exact match	Atlanta, GA, United StatesHQ recorded Sep 17, 2026	201-500	209 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 · Sep 17, 2026 · View company records in RevenueBase
17	Bright Power	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	51-200	205 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 · Sep 17, 2026 · View company records in RevenueBase
18	Energy Management Collaborative EMC	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 17, 2026	201-500	193 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 · Sep 17, 2026 · View company records in RevenueBase
19	Frontier Energy, INC	Exact match	Pleasanton, CA, United StatesHQ recorded Sep 17, 2026	51-200	192 contacts →
	Exact match “Frontier Energy is a professional services firm that excels in market transformation.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Cenergistic	Exact match	Dallas, TX, United StatesHQ recorded Sep 17, 2026	201-500	190 contacts →
	Exact match “At Cenergistic, energy conservation starts with people.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Power Takeoff	Exact match	Denver, CO, United StatesHQ recorded Sep 17, 2026	51-200	167 contacts →
	Exact match “Since 2007, Power TakeOff has been the industry leader in the creation of data-first utility products, services and efficiency programs.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Mcclure Company	Exact match	Harrisburg, PA, United StatesHQ recorded Sep 17, 2026	201-500	166 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 · Sep 17, 2026 · View company records in RevenueBase
23	Syserco, INC	Exact match	Fremont, CA, United StatesHQ recorded Sep 17, 2026	51-200	164 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 · Sep 17, 2026 · View company records in RevenueBase
24	Grumman Butkus Associates	Exact match	Evanston, IL, United StatesHQ recorded Sep 17, 2026	51-200	153 contacts →
	Exact match “Grumman\|Butkus Associates (GBA) is a nationally recognized consulting engineering firm that specializes in mechanical, electrical and plumbing design services and energy and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	RISE	Exact match	Cranston, RI, United StatesHQ recorded Sep 17, 2026	201-500	151 contacts →
	Exact match “RISE is a pioneer in the delivery of turnkey energy-efficiency services for residential, commercial and industrial facilities.” Recorded in the RevenueBase company graph · Sep 17, 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 “industrial energy efficiency firms”. 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 1,766 industrial energy efficiency firms based in the United States

See the full list, filter by size, metro and specialty, and access 12,573 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Sep 17, 2026

44.1%Verified-email coverage

16.1Average contacts per company

1-10Median size (employees)

4.1%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

909

11-50

614

51-200

173

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,766 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 firms” 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 12,573 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 September 17, 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.

Industrial energy efficiency firms 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 “industrial energy efficiency firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 1,766 company matches for industrial energy efficiency firms associated with the United States as of September 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 industrial energy efficiency firms?

New York leads with 72 company records, followed by Houston (63) 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 12,573 professional contacts with verified work emails tracked across these 1,766 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 September 17, 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.