Company lists · Data refreshed October 2026

Top 25 Energy efficiency program implementation services worldwide

Name: Energy efficiency program implementation services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 25, 2026 8,685 companies tracked

RevenueBase identified 8,685 company matches for energy efficiency program implementation services worldwide as of October 2026 and tracks 85,250 professional contacts across them, including 24,531 with verified work emails. The United States is the largest market and Paris the largest hub.

This list covers company matches for energy efficiency program implementation services 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 25, 2026. Country and city lists for energy efficiency program implementation services 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 25, 2026 How this list was built

8,685Companies

85,250Contacts tracked

24,531Verified emails

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The 25 largest energy efficiency program implementation services worldwide

Ranked by team size

Top 25 of 8,685 company matches for energy efficiency program implementation services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 25, 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 25, 2026	10001+	9,535 contacts →
	Exact match “Taking care of things.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
2	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
3	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
4	GK	Exact match	Oslo, NorwayHQ recorded Oct 25, 2026	1,001-5,000	1,134 contacts →
	Exact match “GK er en ledende teknisk entreprenør og servicepartner.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
5	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
6	3e Engenharia EM Eficiencia Energetica	Exact match	BrazilHQ recorded Oct 25, 2026	201-500	530 contacts →
	Exact match “A 3E Engenharia atua nacionalmente, oferecendo soluções para empresas concessionárias de serviços públicos, no planejamento, gestão, execução e inovação em projetos de Eficiência…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
7	Consortium For Energy Efficiency	Exact match	Middleton, MA, United StatesHQ recorded Oct 25, 2026	n/a	485 contacts →
	Exact match “Please visit our careers page, for positions at CEE and CEE member organizations.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
8	Noresco	Exact match	Westborough, MA, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
9	Veolia Industries Global Solutions	Exact match	Aubervilliers, FranceHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
10	Budderfly	Exact match	Shelton, CT, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
11	Homeworks Energy, INC	Exact match	Medford, MA, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
12	ترشيد Tarshid	Exact match	Riyadh, Saudi ArabiaHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
13	Deode Energia	Exact match	Juiz De Fora, BrazilHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
14	Cascade Energy	Exact match	Portland, OR, United StatesHQ recorded Oct 25, 2026	201-500	301 contacts →
	Exact match “At Cascade Energy, we believe in better.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
15	EFFY	Exact match	Paris, FranceHQ recorded Oct 25, 2026	201-500	293 contacts →
	Exact match “Effy, spécialiste de l’efficience énergétique.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
16	Grupo Luminae Energia	Exact match	Osasco, BrazilHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
17	CMC Energy Services	Exact match	Fort Washington, PA, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
18	Lime Energy	Exact match	Newark, NJ, United StatesHQ recorded Oct 25, 2026	201-500	248 contacts →
	Exact match “Lime Energy is building a new energy future.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
19	Prime Energy	Exact match	Sao Paulo, BrazilHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
20	Walker-Miller Energy Services	Exact match	Detroit, MI, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
21	Efficiencyone	Exact match	Dartmouth, NS, CanadaHQ recorded Oct 25, 2026	51-200	221 contacts →
	Exact match “EfficiencyOne is a leading efficiency expert.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
22	PEG	Exact match	Fairfax, VA, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
23	Frontier Energy, INC	Exact match	Pleasanton, CA, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
24	Dalkia Energy Solutions	Exact match	Beverly, MA, United StatesHQ recorded Oct 25, 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 25, 2026 · View company records in RevenueBase
25	Energy Management Collaborative EMC	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 25, 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 25, 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 “energy efficiency program implementation services”. 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 8,685 energy efficiency program implementation services worldwide

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Energy efficiency program implementation services worldwide at a glance

As of Oct 25, 2026

28.8%Verified-email coverage

9.8Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · Paris

Oct 25, 2026Page data refreshed

Companies by employee count

1-10

5,313

11-50

2,576

51-200

577

201-500

107

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 energy efficiency program implementation services are linked below.
What qualifies: Company records worldwide whose business descriptions match “energy efficiency program implementation services” 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 24,531 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 25, 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.

Energy efficiency program implementation services by location

36 lists · largest first

Every Energy efficiency program implementation services 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 “energy efficiency program implementation services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficiency program implementation services are there worldwide?

RevenueBase identified 8,685 company matches for energy efficiency program implementation services 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 energy efficiency program implementation services?

The United States leads with 1,593 companies, followed by France (728) and Italy (687). Every energy efficiency program implementation services list by country and city is linked on this page.

Which city has the most energy efficiency program implementation services?

Paris leads with 107 company records, followed by Madrid (104) and Milan (58).

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 24,531 professional contacts with verified work emails tracked across these 8,685 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 25, 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.