Company lists · Data refreshed September 2026

Top 25 Industrial energy optimization companies worldwide

RevenueBase identified 9,869 industrial energy optimization companies worldwide as of September 2026 and tracks 136,765 professional contacts across them, including 45,001 with verified work emails and 0 with mobile numbers. The United States is the largest market and Madrid the largest hub.

This list covers industrial energy optimization companies worldwide, 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 17, 2026. Country and city lists for industrial energy optimization companies follow the table.

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 17, 2026 86% judged on-target in blind review
9,869Companies
136,765Contacts tracked
45,001Verified emails
0Mobile numbers
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The 25 largest industrial energy optimization companies worldwide

Ranked by team size
Top 25 of 9,869 industrial energy optimization companies worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to industrial energy optimization companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceWindsor, United KingdomHQ checked Sep 17, 202610001+9,238 contacts →

Indirect evidence

“Taking care of things.”

Source: RevenueBase Database · checked Sep 17, 2026
2Indirect evidenceSaint-andré-lez-lille, FranceHQ checked Sep 17, 202610001+8,427 contacts →

Indirect evidence

“Dalkia : ensemble, relevons le défi climatique!”

Source: RevenueBase Database · checked Sep 17, 2026
3Partial evidenceLondon, United KingdomHQ checked Sep 17, 20261,001-5,0002,627 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 17, 2026
4Partial evidenceAustin, TX, United StatesHQ checked Sep 17, 20261,001-5,0002,121 contacts →

Partial evidence

“CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.”

Source: RevenueBase Database · checked Sep 17, 2026
5Partial evidenceFramingham, MA, United StatesHQ checked Sep 17, 20261,001-5,0001,383 contacts →

Partial evidence

“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…”

Source: RevenueBase Database · checked Sep 17, 2026
6Partial evidenceNordborg, DenmarkHQ checked Sep 17, 202610001+1,128 contacts →

Partial evidence

“At Danfoss Climate Solutions, we engineer energy-efficient heating and cooling solutions to help the world get more out of less.”

Source: RevenueBase Database · checked Sep 17, 2026
7Partial evidenceEschborn, GermanyHQ checked Sep 17, 20261,001-5,0001,021 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 17, 2026
8Partial evidenceHalf Moon Bay, CA, United StatesHQ checked Sep 17, 2026501-1,000733 contacts →

Partial evidence

“Resource Innovations (RI) is an energy transformation firm.”

Source: RevenueBase Database · checked Sep 17, 2026
9Strong evidenceLegnago, ItalyHQ checked Sep 17, 20261,001-5,000690 contacts →

Strong evidence

“For over 100 years, Riello’s Energy For Life has been at the core of its industrial policy, guiding the company in the development of solutions designed to provide comfort and…”

Source: RevenueBase Database · checked Sep 17, 2026
10Indirect evidenceWalton-on-thames, United KingdomHQ checked Sep 17, 2026201-500658 contacts →

Indirect evidence

“We are passionate about driving sustainable change for our planet.”

Source: RevenueBase Database · checked Sep 17, 2026
11Indirect evidenceVinci, ItalyHQ checked Sep 17, 2026201-500655 contacts →

Indirect evidence

“Enegan offre soluzioni personalizzate per le aziende abbinando alla fornitura di elettricità, gas e telecomunicazioni una vasta gamma di prodotti e servizi ad alto valore…”

Source: RevenueBase Database · checked Sep 17, 2026
12Indirect evidenceMilan, ItalyHQ checked Sep 17, 2026201-500608 contacts →

Indirect evidence

“Da dicembre 2025, abbiamo integrato EF Solare, il primo produttore fotovoltaico italiano.”

Source: RevenueBase Database · checked Sep 17, 2026
13Partial evidenceLondon, United KingdomHQ checked Sep 17, 2026501-1,000595 contacts →

Partial evidence

“Kaluza is the Energy Intelligence Platform, turning energy complexity into seamless coordination.”

Source: RevenueBase Database · checked Sep 17, 2026
14Partial evidenceDubai, United Arab EmiratesHQ checked Sep 17, 2026501-1,000595 contacts →

Partial evidence

“At Harris Pye, everything we do saves energy.”

Source: RevenueBase Database · checked Sep 17, 2026
15Strong evidenceDoral, FL, United StatesHQ checked Sep 17, 20261,001-5,000567 contacts →

Strong evidence

“SoEnergy is a global provider of "energy as a service", ensuring customized solutions for a diverse array of organizations and industries worldwide, such as mining, oil & gas…”

Source: RevenueBase Database · checked Sep 17, 2026
16Partial evidenceCarmel, IN, United StatesHQ checked Sep 17, 2026201-500478 contacts →

Partial evidence

“ACES is a nationwide energy management company that helps its clients buy, sell, and manage the complexity of the U.S.”

Source: RevenueBase Database · checked Sep 17, 2026
17Strong evidenceGurugram, IndiaHQ checked Sep 17, 2026201-500470 contacts →

Strong evidence

“Serentica Renewables India Private Limited,(Serentica) is a is an end-to-end energy solutions company enabling large-scale heavy energy intensive industries and sector to…”

Source: RevenueBase Database · checked Sep 17, 2026
18Strong evidenceAubervilliers, FranceHQ checked Sep 17, 20261,001-5,000460 contacts →

Strong evidence

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

Source: RevenueBase Database · checked Sep 17, 2026
19Strong evidenceBangalore, IndiaHQ checked Sep 17, 2026501-1,000446 contacts →

Strong evidence

“Founded in 2004 by a passionate team of entrepreneurs with deep expertise in energy management, Elmeasure began with a bold mission: to help industries, businesses, and…”

Source: RevenueBase Database · checked Sep 17, 2026
20Partial evidenceBerlin, GermanyHQ checked Sep 17, 20261,001-5,000442 contacts →

Partial evidence

“The PSI Group develops software products for optimizing the flow of energy and materials for utilities and industry.”

Source: RevenueBase Database · checked Sep 17, 2026
21Partial evidenceUtrecht, NetherlandsHQ checked Sep 17, 2026201-500390 contacts →

Partial evidence

“We develop products that allow manufacturers to easily monitor energy consumption and gain insight into machine maintenance.”

Source: RevenueBase Database · checked Sep 17, 2026
22Partial evidencePhoenix, MO, United StatesHQ checked Sep 17, 2026501-1,000383 contacts →

Partial evidence

“Veregy is an award-winning NAESCO-Accredited decarbonization company focusing on accelerating and simplifying the Energy Transition.”

Source: RevenueBase Database · checked Sep 17, 2026
23Partial evidenceIrvine, CA, United StatesHQ checked Sep 17, 2026201-500383 contacts →

Partial evidence

“We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.”

Source: RevenueBase Database · checked Sep 17, 2026
24Partial evidenceShelton, CT, United StatesHQ checked Sep 17, 2026201-500366 contacts →

Partial evidence

“Budderfly is redefining how energy efficiency, resilience, and grid participation can work together across America’s commercial sector.”

Source: RevenueBase Database · checked Sep 17, 2026
25Strong evidenceNantes, FranceHQ checked Sep 17, 2026201-500363 contacts →

Strong evidence

“As an all trade and energy engineering company, ALTEREA operates through a reasoned approach in all your renovation projects, construction and energy optimization projects in the…”

Source: RevenueBase Database · checked Sep 17, 2026

Showing 25 of 9,869 industrial energy optimization companies worldwide

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Industrial energy optimization companies worldwide at a glance

As of Sep 17, 2026
32.9%Verified-email coverage
13.9Average contacts per company
1-10Median size (employees)
1.7%Largest-city concentration · Madrid
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
5,641
11-50
3,138
51-200
782
201-500
161
501-1,000
42
1,001-5,000
39
5,001-10,000
6
10001+
9

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 industrial energy optimization companies, 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.
Coverage
34 countries, largest first: the United States, Spain, France, Italy, Germany, the United Kingdom, Brazil, India, Canada, Australia and 24 more. Country and city lists for industrial energy optimization companies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “industrial energy optimization companies”. 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 industrial energy optimization companies), 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 industrial energy optimization companies, and records with no verified work email.
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, 45,001 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 17, 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.

Industrial energy optimization companies by location

49 lists · largest first

Every Industrial energy optimization 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 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 industrial energy optimization companies, 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 industrial energy optimization companies are there worldwide?

RevenueBase identified 9,869 industrial energy optimization companies worldwide 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?

British GAS, headquartered in Windsor, tops this list with the largest team on record.

Which country has the most industrial energy optimization companies?

The United States leads with 1,898 companies, followed by Spain (920) and France (859). Every industrial energy optimization companies list by country and city is linked on this page.

Which city has the most industrial energy optimization companies?

Madrid leads with 164 headquartered companies, followed by Paris (138) and London (104).

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 45,001 verified decision-maker contacts tracked across these 9,869 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 17, 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.