Company lists · Data refreshed September 2026

Top 25 Energy efficiency auditing firms based in the United States

Name: Energy efficiency auditing 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 16, 2026 963 companies tracked

RevenueBase identified 963 energy efficiency auditing firms headquartered in the United States as of September 2026 and tracks 11,539 professional contacts across them, including 4,660 with verified work emails. New York is the largest hub.

This list covers energy efficiency auditing firms 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

963Companies

11,539Contacts tracked

4,660Verified emails

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

Ranked by team size

Top 25 of 963 energy efficiency auditing firms 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 energy efficiency auditing firms: 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	Cascade Energy	Partial evidence	Portland, OR, United StatesHQ checked Sep 16, 2026	201-500	288 contacts →
	Partial evidence “At Cascade Energy, we believe in better.” Source: RevenueBase Database · checked Sep 16, 2026
3	PEG	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 16, 2026	201-500	214 contacts →
	Partial evidence “PEG presents a comprehensive capacity for the evaluation and understanding of a broad base of energy and environmental sustainability related programs, policies and initiatives.” Source: RevenueBase Database · checked Sep 16, 2026
4	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
5	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
6	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
7	Concord Engineering Group, INC	Indirect evidence	Voorhees, NJ, United StatesHQ checked Sep 16, 2026	51-200	135 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
8	Sain Engineering Associates INC	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 16, 2026	51-200	134 contacts →
	Indirect evidence “Sain Engineering Associates, Inc.(SEA) is a U.S.” Source: RevenueBase Database · checked Sep 16, 2026
9	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
10	Michaels Energy- An Inc. 5000 Company	Partial evidence	La Crosse, WI, United StatesHQ checked Sep 16, 2026	51-200	121 contacts →
	Partial evidence “Michaels Energy is a veteran-owned energy consulting firm that exists to help businesses minimize waste and maximize value.” Source: RevenueBase Database · checked Sep 16, 2026
11	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
12	Ideal Impact, INC	Indirect evidence	Grapevine, TX, United StatesHQ checked Sep 16, 2026	51-200	116 contacts →
	Indirect evidence “Ideal Impact was founded March 2, 2009 with a well-defined mission and strategy: to use our world-renowned expertise to generate $10 billion for education and ministries.” Source: RevenueBase Database · checked Sep 16, 2026
13	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
14	KW Engineering	Partial evidence	Oakland, CA, United StatesHQ checked Sep 16, 2026	51-200	97 contacts →
	Partial evidence “In 1998, I started kW Engineering as a two-person firm with a singular vision: to become the leading technical experts at saving money in buildings by saving energy and water.” Source: RevenueBase Database · checked Sep 16, 2026
15	Navigate Power	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 16, 2026	1,001-5,000	96 contacts →
	Indirect evidence “Register Your Interest: https://navigatepower.pinpointhq.com/register-your-interest/new Navigate Power is a leading electricity and natural gas consulting firm, headquartered in…” Source: RevenueBase Database · checked Sep 16, 2026
16	Optimum Energy	Strong evidence	Seattle, WA, United StatesHQ checked Sep 16, 2026	51-200	86 contacts →
	Strong evidence “With 20 years of experience and 300+ plants and institutions served globally, nobody understands energy infrastructure, efficiency, and financial opportunity quite like Optimum…” Source: RevenueBase Database · checked Sep 16, 2026
17	Ecosave	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 16, 2026	51-200	79 contacts →
	Partial evidence “Headquartered in Philadelphia, Ecosave is a leading global independent Energy-as-a-Service provider, offering free energy savings assessments, guaranteed savings, fixed price…” Source: RevenueBase Database · checked Sep 16, 2026
18	Utility Management Services, INC	Partial evidence	Wilmington, NC, United StatesHQ checked Sep 16, 2026	51-200	69 contacts →
	Partial evidence “Certified Energy Experts analyzing utility bills and advising in energy procurement for businesses, governments, organizations, and companies across the United States.” Source: RevenueBase Database · checked Sep 16, 2026
19	GSE	Indirect evidence	La Jolla, CA, United StatesHQ checked Sep 16, 2026	51-200	67 contacts →
	Indirect evidence “GSE is dedicated to leading the world, and our clients, toward a more sustainable future.” Source: RevenueBase Database · checked Sep 16, 2026
20	Abode Energy Management	Strong evidence	Concord, MA, United StatesHQ checked Sep 16, 2026	11-50	64 contacts →
	Strong evidence “Abode Energy Management is an energy consulting firm driving efficiency improvements for New England’s built environment.” Source: RevenueBase Database · checked Sep 16, 2026
21	SEMCO	Partial evidence	Birmingham, AL, United StatesHQ checked Sep 16, 2026	n/a	64 contacts →
	Partial evidence “If your business is interested in cutting energy costs and securing little known incentives to help fund initial project costs, SEMCO can help you.” Source: RevenueBase Database · checked Sep 16, 2026
22	Energy 350, INC	Strong evidence	Portland, OR, United StatesHQ checked Sep 16, 2026	51-200	60 contacts →
	Strong evidence “Energy 350 takes pride in performing high quality energy studies and energy efficiency related services for end users as well as program administrators.” Source: RevenueBase Database · checked Sep 16, 2026
23	Staples Energy	Partial evidence	Pewaukee, WI, United StatesHQ checked Sep 16, 2026	51-200	59 contacts →
	Partial evidence “Staples Energy helps commercial and residential customers, places of worship, and public facilities save hundreds of millions of kilowatt hours of energy.” Source: RevenueBase Database · checked Sep 16, 2026
24	Partner Energy	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	51-200	57 contacts →
	Partial evidence “Partner Energy, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
25	Energy Management Systems, INC	Strong evidence	Exton, PA, United StatesHQ checked Sep 16, 2026	51-200	57 contacts →
	Strong evidence “With over 40 years of experience, Energy Management Systems is one of the premier providers of Energy and Efficiency solutions to the Commercial and Residential Real Estate…” 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: energy efficiency auditing firms. 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 energy efficiency auditing firms.
Partial evidence: Its own public description names part of energy efficiency auditing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency auditing firms. 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 963 energy efficiency auditing firms based in the United States

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Energy efficiency auditing firms based in the United States at a glance

As of Sep 16, 2026

40.4%Verified-email coverage

12.0Average contacts per company

1-10Median size (employees)

2.9%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

541

11-50

320

51-200

201-500

501-1,000

1,001-5,000

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 963 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 energy efficiency auditing firms, 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 “energy efficiency auditing firms”. 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 energy efficiency auditing firms), 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 energy efficiency auditing firms, 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, 4,660 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.

Energy efficiency auditing firms by metro

Energy efficiency auditing firms in New York28

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 energy efficiency auditing firms, 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 energy efficiency auditing firms are there based in the United States?

RevenueBase identified 963 energy efficiency auditing firms 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 energy efficiency auditing firms?

New York leads with 28 headquartered companies, followed by Denver (17) and Chicago (14).

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 4,660 verified decision-maker contacts tracked across these 963 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.