Company lists · Data refreshed October 2026

Top 25 Commercial energy efficiency contractors worldwide

Name: Commercial energy efficiency contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 9,341 companies tracked

RevenueBase identified 9,341 company matches for commercial energy efficiency contractors worldwide as of October 2026 and tracks 99,765 professional contacts across them, including 30,661 with verified work emails. The United States is the largest market and Paris the largest hub.

This list covers company matches for commercial energy efficiency contractors worldwide, 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. Country and city lists for commercial energy efficiency contractors follow the table.

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

9,341Companies

99,765Contacts tracked

30,661Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest commercial energy efficiency contractors worldwide

Ranked by team size

Top 25 of 9,341 company matches for commercial energy efficiency contractors worldwide, 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	British GAS	Exact match	Windsor, United KingdomHQ recorded Oct 10, 2026	10001+	9,535 contacts →
	Exact match “Taking care of things.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	Dalkia	Exact match	Saint-andré-lez-lille, FranceHQ recorded Oct 10, 2026	10001+	8,823 contacts →
	Exact match “Dalkia : ensemble, relevons le défi climatique!” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3	SICIM	Exact match	Busseto, ItalyHQ recorded Oct 10, 2026	10001+	2,480 contacts →
	Exact match “SICIM is a leading Worldwide EPC Contractor since 1962, offering all kinds of services related to the production, treatment and transportation of traditional energy sources and…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	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
5	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
6	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
7	Veolia Industries Global Solutions	Exact match	Aubervilliers, FranceHQ recorded Oct 10, 2026	1,001-5,000	429 contacts →
	Exact match “Veolia Industries Global Solutions est devenu Veolia Energie Performance depuis le 1er juin 2025.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	International Energy Services Limited	Exact match	Lagos, NigeriaHQ recorded Oct 10, 2026	201-500	410 contacts →
	Exact match “International Energy Services Limited (IESL) – Key Company Information IESL was registered in Nigeria in 1990 as an indigenous energy services company.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9	BECIS	Exact match	SingaporeHQ recorded Oct 10, 2026	201-500	392 contacts →
	Exact match “BECIS is a leading Energy as a Service (EaaS) provider to high-quality commercial and industrial customers.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	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
11	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
12	ترشيد Tarshid	Exact match	Riyadh, Saudi ArabiaHQ recorded Oct 10, 2026	201-500	355 contacts →
	Exact match “The National Energy Services Company (TARSHID) is a national company wholly owned by the Public Investment Fund (PIF).” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13	Deode Energia	Exact match	Juiz De Fora, BrazilHQ recorded Oct 10, 2026	201-500	313 contacts →
	Exact match “A DEODE Energia foi fundada em 2012 proveniente da HF Energy.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	Hellio	Exact match	Clichy, FranceHQ recorded Oct 10, 2026	201-500	309 contacts →
	Exact match “Engagé depuis 2008, Hellio est le pionnier du marché des économies d’énergie en France (métropole et Outre-Mer).” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15	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
16	Grupo Luminae Energia	Exact match	Osasco, BrazilHQ recorded Oct 10, 2026	501-1,000	280 contacts →
	Exact match “Fundado em 2008 pelo engenheiro André Ferreira, o Grupo Luminae Energia é referência em eficiência energética na América Latina.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	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
18	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
19	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
20	Prime Energy	Exact match	Sao Paulo, BrazilHQ recorded Oct 10, 2026	51-200	236 contacts →
	Exact match “Empresa voltada a projetos de Otimização e Eficiêntização no uso da energia elétrica.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	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
22	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
23	Efficiencyone	Exact match	Dartmouth, NS, CanadaHQ recorded Oct 10, 2026	51-200	221 contacts →
	Exact match “EfficiencyOne is a leading efficiency expert.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	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
25	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

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 9,341 commercial energy efficiency contractors worldwide

See the full list, filter by size, metro and specialty, and access 30,661 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Commercial energy efficiency contractors worldwide at a glance

As of Oct 10, 2026

30.7%Verified-email coverage

10.7Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · Paris

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

5,653

11-50

2,797

51-200

681

201-500

115

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for commercial energy efficiency contractors are linked below.
What qualifies: Company records worldwide 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. 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 30,661 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 location

39 lists · largest first

Every Commercial energy efficiency contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 worldwide?

RevenueBase identified 9,341 company matches for commercial energy efficiency contractors worldwide 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?

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

Which country has the most commercial energy efficiency contractors?

The United States leads with 2,181 companies, followed by France (720) and Italy (604). Every commercial energy efficiency contractors list by country and city is linked on this page.

Which city has the most commercial energy efficiency contractors?

Paris leads with 114 company records, followed by Madrid (101) and London (80).

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 30,661 professional contacts with verified work emails tracked across these 9,341 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.

Ready to reach these companies? Verified emails and direct dials for all 9,341 commercial energy efficiency contractors worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.