Company lists · Data refreshed September 2026

Top 25 Energy optimization companies worldwide

Name: Energy optimization companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 13,540 companies tracked

RevenueBase identified 13,540 company matches for energy optimization companies worldwide as of September 2026 and tracks 202,536 professional contacts across them, including 54,462 with verified work emails. The United States is the largest market and Madrid the largest hub.

This list covers company matches for energy optimization 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 September 21, 2026. Country and city lists for energy optimization 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 Sep 21, 2026 How this list was built

13,540Companies

202,536Contacts tracked

54,462Verified emails

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The 25 largest energy optimization companies worldwide

Ranked by team size

Top 25 of 13,540 company matches for energy optimization companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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	Johnson Controls	Exact match	Cork, IrelandHQ recorded Sep 21, 2026	10001+	52,736 contacts →
	Exact match “Johnson Controls is a global leader in thermal management, mission-critical building systems, energy efficiency and decarbonization.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	British GAS	Exact match	Windsor, United KingdomHQ recorded Sep 21, 2026	10001+	9,238 contacts →
	Exact match “Taking care of things.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Dalkia	Exact match	Saint-andré-lez-lille, FranceHQ recorded Sep 21, 2026	10001+	8,427 contacts →
	Exact match “Dalkia : ensemble, relevons le défi climatique!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Shell Energy	Exact match	London, United KingdomHQ recorded Sep 21, 2026	1,001-5,000	2,627 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 · Sep 21, 2026 · View company records in RevenueBase
5	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,121 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 · Sep 21, 2026 · View company records in RevenueBase
6	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,383 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 · Sep 21, 2026 · View company records in RevenueBase
7	Aden Group	Exact match	SingaporeHQ recorded Sep 21, 2026	10001+	1,105 contacts →
	Exact match “Aden Group is a Euro-Asian enterprise delivering comprehensive solutions to boost decarbonization, productivity and energy transition in the built environment.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Sunnova Energy	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	501-1,000	906 contacts →
	Exact match “Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	851 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 · Sep 21, 2026 · View company records in RevenueBase
10	Energy Solutions	Exact match	Oakland, CA, United StatesHQ recorded Sep 21, 2026	201-500	772 contacts →
	Exact match “Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Resource Innovations	Exact match	Half Moon Bay, CA, United StatesHQ recorded Sep 21, 2026	501-1,000	733 contacts →
	Exact match “Resource Innovations (RI) is an energy transformation firm.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Albireo Energy	Exact match	Edison, NJ, United StatesHQ recorded Sep 21, 2026	1,001-5,000	669 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 · Sep 21, 2026 · View company records in RevenueBase
13	KBC A Yokogawa Company	Exact match	Walton-on-thames, United KingdomHQ recorded Sep 21, 2026	201-500	658 contacts →
	Exact match “We are passionate about driving sustainable change for our planet.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Sorgenia	Exact match	Milan, ItalyHQ recorded Sep 21, 2026	201-500	608 contacts →
	Exact match “Da dicembre 2025, abbiamo integrato EF Solare, il primo produttore fotovoltaico italiano.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Palmetto	Exact match	Charlotte, NC, United StatesHQ recorded Sep 21, 2026	201-500	539 contacts →
	Exact match “Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Posigen	Exact match	St. Rose, LA, United StatesHQ recorded Sep 21, 2026	501-1,000	507 contacts →
	Exact match “PosiGen is the nation's leading residential solar and energy efficiency provider.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Noresco	Exact match	Westborough, MA, United StatesHQ recorded Sep 21, 2026	201-500	481 contacts →
	Exact match “NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	3e Engenharia EM Eficiencia Energetica	Exact match	BrazilHQ recorded Sep 21, 2026	201-500	473 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 · Sep 21, 2026 · View company records in RevenueBase
19	Korra Energi	Exact match	Cairo, EgyptHQ recorded Sep 21, 2026	1,001-5,000	469 contacts →
	Exact match “Korra Energi is a proud Egyptian leader in energy efficiency and construction services, backed by over 25 years of expertise and a vision of "Growth and Prosperity"(إعمار الأرض).” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Veolia Industries Global Solutions	Exact match	Aubervilliers, FranceHQ recorded Sep 21, 2026	1,001-5,000	460 contacts →
	Exact match “Veolia Industries Global Solutions est devenu Veolia Energie Performance depuis le 1er juin 2025.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Sunpower Philippines Manufacturing Limited	Exact match	3rd Street, PhilippinesHQ recorded Sep 21, 2026	201-500	459 contacts →
	Exact match “Go solar, reduce your energy bills and discover why SunPower is a world standard in solar solutions for homes, businesses and utilities.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Elmeasure	Exact match	Bangalore, IndiaHQ recorded Sep 21, 2026	501-1,000	446 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Veregy	Exact match	Phoenix, MO, United StatesHQ recorded Sep 21, 2026	501-1,000	383 contacts →
	Exact match “Veregy is an award-winning NAESCO-Accredited decarbonization company focusing on accelerating and simplifying the Energy Transition.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	TRIO	Exact match	Irvine, CA, United StatesHQ recorded Sep 21, 2026	201-500	383 contacts →
	Exact match “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Budderfly	Exact match	Shelton, CT, United StatesHQ recorded Sep 21, 2026	201-500	366 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 · Sep 21, 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 optimization companies”. 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 13,540 energy optimization companies worldwide

See the full list, filter by size, metro and specialty, and access 54,462 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy optimization companies worldwide at a glance

As of Sep 21, 2026

26.9%Verified-email coverage

15.0Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · Madrid

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

8,056

11-50

4,133

51-200

987

201-500

186

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 optimization companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “energy optimization 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 54,462 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 September 21, 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 optimization companies by location

50 lists · largest first

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

How many energy optimization companies are there worldwide?

RevenueBase identified 13,540 company matches for energy optimization companies worldwide as of September 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?

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

Which country has the most energy optimization companies?

The United States leads with 2,288 companies, followed by France (977) and Spain (931). Every energy optimization companies list by country and city is linked on this page.

Which city has the most energy optimization companies?

Madrid leads with 159 company records, followed by Paris (155) and London (130).

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 54,462 professional contacts with verified work emails tracked across these 13,540 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 September 21, 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.