Company lists · Data refreshed October 2026

Top 25 Commercial energy efficiency consultants based in the United States

Name: Commercial energy efficiency consultants 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 2,134 companies tracked

RevenueBase identified 2,134 company matches for commercial energy efficiency consultants associated with the United States as of October 2026 and tracks 26,798 professional contacts across them, including 11,370 with verified work emails. New York is the largest hub.

This list covers company matches for commercial energy efficiency consultants 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

2,134Companies

26,798Contacts tracked

11,370Verified emails

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

Ranked by team size

Top 25 of 2,134 company matches for commercial energy efficiency consultants 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	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	872 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 10, 2026 · View company records in RevenueBase
4	TRIO	Exact match	Irvine, CA, United StatesHQ recorded Oct 10, 2026	201-500	387 contacts →
	Exact match “We are Trio – global energy and sustainability advisors.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Oct 10, 2026	201-500	381 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 · Oct 10, 2026 · View company records in RevenueBase
6	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
7	NUS Consulting Group	Exact match	Park Ridge, NJ, United StatesHQ recorded Oct 10, 2026	201-500	360 contacts →
	Exact match “National Utility Service, Inc.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	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
16	Cenergistic	Exact match	Dallas, TX, United StatesHQ recorded Oct 10, 2026	201-500	198 contacts →
	Exact match “At Cenergistic, energy conservation starts with people.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	Nexant	Exact match	Half Moon Bay, CA, United StatesHQ recorded Oct 10, 2026	201-500	189 contacts →
	Exact match “Resource Innovations now combined with Nexant is a substantially woman-owned, woman-led energy consulting firm dedicated to creating equal access to clean resources through…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	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
19	Grumman Butkus Associates	Exact match	Evanston, IL, United StatesHQ recorded Oct 10, 2026	51-200	158 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 · Oct 10, 2026 · View company records in RevenueBase
20	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
21	RISE	Exact match	Cranston, RI, United StatesHQ recorded Oct 10, 2026	201-500	147 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 · Oct 10, 2026 · View company records in RevenueBase
22	Merit Advisors, LLC	Exact match	Dallas, TX, United StatesHQ recorded Oct 10, 2026	51-200	140 contacts →
	Exact match “Merit Advisors provides our partners in the energy industry with the best financial solutions and vision to uncover overlooked savings.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23	Four Seasons Environmental, INC	Exact match	Monroe, OH, United StatesHQ recorded Oct 10, 2026	201-500	139 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	Sain Engineering Associates INC	Exact match	Birmingham, AL, United StatesHQ recorded Oct 10, 2026	51-200	138 contacts →
	Exact match “Sain Engineering Associates, Inc.(SEA) is a U.S.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25	Melink Corporation	Exact match	Milford, OH, United StatesHQ recorded Oct 10, 2026	51-200	131 contacts →
	Exact match “We are a global provider of energy efficiency solutions for commercial buildings with five business offerings: HVAC Testing, Adjusting & Balancing, Intelli-Hood® Kitchen…” 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 consultants”. 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 2,134 commercial energy efficiency consultants based in the United States

See the full list, filter by size, metro and specialty, and access 11,370 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Oct 10, 2026

42.4%Verified-email coverage

12.6Average contacts per company

1-10Median size (employees)

3.4%Largest-city concentration · New York

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

1,191

11-50

728

51-200

161

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 2,134 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 consultants” 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 11,370 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 consultants 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 consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 2,134 company matches for commercial energy efficiency consultants 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 consultants?

New York leads with 72 company records, followed by Houston (69) and Atlanta (35).

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 11,370 professional contacts with verified work emails tracked across these 2,134 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.