Company lists · Data refreshed November 2026

Top 25 Energy efficient companies worldwide

RevenueBase identified 6,402 company matches for energy efficient companies worldwide as of November 2026 and tracks 80,996 professional contacts across them, including 25,682 with verified work emails. The United States is the largest market and Madrid the largest hub.

This list covers company matches for energy efficient companies 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 November 5, 2026. Country and city lists for energy efficient companies 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 Nov 5, 2026 How this list was built
6,402Companies
80,996Contacts tracked
25,682Verified emails
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The 25 largest energy efficient companies worldwide

Ranked by team size
Top 25 of 6,402 company matches for energy efficient companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchWindsor, United KingdomHQ recorded Nov 5, 202610001+9,964 contacts →

Exact match

“Taking care of things.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchSaint-andré-lez-lille, FranceHQ recorded Nov 5, 202610001+9,075 contacts →

Exact match

“Dalkia : ensemble, relevons le défi climatique!”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Nov 5, 20261,001-5,0002,764 contacts →

Exact match

“We help businesses manage energy needs, boost efficiency, control costs and achieve decarbonisation goals for a better energy future.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchAustin, TX, United StatesHQ recorded Nov 5, 20261,001-5,0002,264 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 · Nov 5, 2026 · View company records in RevenueBase
5Exact matchEschborn, GermanyHQ recorded Nov 5, 20261,001-5,0001,086 contacts →

Exact match

“Techem is a leading global energy service provider for the real estate sector and private homeowners.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchEdison, NJ, United StatesHQ recorded Nov 5, 20261,001-5,000672 contacts →

Exact match

“Albireo Energy is a leading independent building controls and energy services provider recognized by customers for creating intelligent, high-performance buildings.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchWestborough, NJ, United StatesHQ recorded Nov 5, 2026201-500496 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 · Nov 5, 2026 · View company records in RevenueBase
8Exact matchAubervilliers, FranceHQ recorded Nov 5, 20261,001-5,000435 contacts →

Exact match

“Veolia Industries Global Solutions est devenu Veolia Energie Performance depuis le 1er juin 2025.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchShelton, CT, United StatesHQ recorded Nov 5, 2026201-500393 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 · Nov 5, 2026 · View company records in RevenueBase
10Exact matchMedford, MA, United StatesHQ recorded Nov 5, 2026201-500381 contacts →

Exact match

“At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchRiyadh, Saudi ArabiaHQ recorded Nov 5, 2026201-500368 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 · Nov 5, 2026 · View company records in RevenueBase
12Exact matchIstanbul, TürkiyeHQ recorded Nov 5, 2026201-500336 contacts →

Exact match

“A World Brand/Pride of Turkey In Energy Quality ENTES is a family that works ardently for energy quality and efficiency in our country, where energy is valuable and overcosting.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchJuiz De Fora, BrazilHQ recorded Nov 5, 2026201-500323 contacts →

Exact match

“A DEODE Energia foi fundada em 2012 proveniente da HF Energy.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchClichy, FranceHQ recorded Nov 5, 2026201-500314 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 · Nov 5, 2026 · View company records in RevenueBase
15Exact matchPortland, OR, United StatesHQ recorded Nov 5, 2026201-500304 contacts →

Exact match

“At Cascade Energy, we believe in better.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchFort Washington, NJ, United StatesHQ recorded Nov 5, 2026201-500267 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 · Nov 5, 2026 · View company records in RevenueBase
17Exact matchPittsburgh, PA, United StatesHQ recorded Nov 5, 20261,001-5,000255 contacts →

Exact match

“Direct Energy Business is part of a leading energy and energy-related services provider that is focused on helping customers make their businesses better.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchNewark, NJ, United StatesHQ recorded Nov 5, 2026201-500250 contacts →

Exact match

“Lime Energy is building a new energy future.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchSao Paulo, BrazilHQ recorded Nov 5, 202651-200237 contacts →

Exact match

“Empresa voltada a projetos de Otimização e Eficiêntização no uso da energia elétrica.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchDartmouth, NS, CanadaHQ recorded Nov 5, 202651-200228 contacts →

Exact match

“EfficiencyOne is a leading efficiency expert.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21Exact matchDetroit, MI, United StatesHQ recorded Nov 5, 202651-200227 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 · Nov 5, 2026 · View company records in RevenueBase
22Exact matchBury, United KingdomHQ recorded Nov 5, 2026201-500226 contacts →

Exact match

“Who we are » The UK’s leading Energy Management company » Our aim is to increase energy performance within buildings » Deliver energy projects to maximise customer return on…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchBeverly, MA, United StatesHQ recorded Nov 5, 2026201-500225 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 · Nov 5, 2026 · View company records in RevenueBase
24Exact matchFairfax, VA, United StatesHQ recorded Nov 5, 2026201-500223 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 · Nov 5, 2026 · View company records in RevenueBase
25Exact matchMoncton, BC, CanadaHQ recorded Nov 5, 2026501-1,000218 contacts →

Exact match

“Greenfoot Energy Solutions was established in 2014 by a group of energy experts dedicated to improving energy efficiency in Atlantic Canada.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 25 of 6,402 energy efficient companies worldwide

See the full list, filter by size, metro and specialty, and access 25,682 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy efficient companies worldwide at a glance

As of Nov 5, 2026
31.7%Verified-email coverage
12.7Average contacts per company
1-10Median size (employees)
1.3%Largest-city concentration · Madrid
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
3,739
11-50
2,007
51-200
464
201-500
87
501-1,000
21
1,001-5,000
21
5,001-10,000
3
10001+
6

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 efficient companies are linked below.
What qualifies
Company records worldwide whose business descriptions match “energy efficient companies” 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 25,682 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 November 5, 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 efficient companies by location

31 lists · largest first

Every Energy efficient companies 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 efficient companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficient companies are there worldwide?

RevenueBase identified 6,402 company matches for energy efficient companies worldwide as of November 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 efficient companies?

The United States leads with 1,260 companies, followed by the United Kingdom (471) and Spain (463). Every energy efficient companies list by country and city is linked on this page.

Which city has the most energy efficient companies?

Madrid leads with 81 company records, followed by Paris (69) and London (61).

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 25,682 professional contacts with verified work emails tracked across these 6,402 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 November 5, 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.