Company lists · Data refreshed September 2026

Top 25 Commercial energy consultants worldwide

RevenueBase identified 22,854 commercial energy consultants worldwide as of September 2026 and tracks 393,520 professional contacts across them, including 119,433 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers commercial energy consultants 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 16, 2026. Country and city lists for commercial energy consultants 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 16, 2026 86% judged on-target in blind review
22,854Companies
393,520Contacts tracked
119,433Verified emails
0Mobile numbers
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The 25 largest commercial energy consultants worldwide

Ranked by team size
Top 25 of 22,854 commercial energy consultants worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to commercial energy consultants: 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
1Partial evidenceCork, IrelandHQ checked Sep 16, 202610001+52,736 contacts →

Partial evidence

“Johnson Controls is a global leader in thermal management, mission-critical building systems, energy efficiency and decarbonization.”

Source: RevenueBase Database · checked Sep 16, 2026
2Partial evidenceSydney, AustraliaHQ checked Sep 16, 202610001+34,763 contacts →

Partial evidence

“Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia.”

Source: RevenueBase Database · checked Sep 16, 2026
3Partial evidenceAberdeen, United KingdomHQ checked Sep 16, 202610001+26,949 contacts →

Partial evidence

“Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.”

Source: RevenueBase Database · checked Sep 16, 2026
4Partial evidenceLa Garenne-colombes, FranceHQ checked Sep 16, 202610001+12,011 contacts →

Partial evidence

“Les activités Infrastructures Energétiques Locales d’ENGIE accompagnent les collectivités, les industries et le secteur du bâtiment sur la voie de la décarbonation.”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceWindsor, United KingdomHQ checked Sep 16, 202610001+9,238 contacts →

Indirect evidence

“Taking care of things.”

Source: RevenueBase Database · checked Sep 16, 2026
6Indirect evidenceLondon, United KingdomHQ checked Sep 16, 20265,001-10,0009,119 contacts →

Indirect evidence

“Sustainability is our business.”

Source: RevenueBase Database · checked Sep 16, 2026
7Indirect evidenceSaint-andré-lez-lille, FranceHQ checked Sep 16, 202610001+8,427 contacts →

Indirect evidence

“Dalkia : ensemble, relevons le défi climatique!”

Source: RevenueBase Database · checked Sep 16, 2026
8Partial evidenceDubai, United Arab EmiratesHQ checked Sep 16, 20265,001-10,0004,058 contacts →

Partial evidence

“Enova is the regional leader in integrated energy and multi-technical services, delivering comprehensive services to its clients.”

Source: RevenueBase Database · checked Sep 16, 2026
9Partial evidenceLondon, United KingdomHQ checked Sep 16, 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 16, 2026
10Partial evidenceSeattle, WA, United StatesHQ checked Sep 16, 20261,001-5,0002,213 contacts →

Partial evidence

“We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.”

Source: RevenueBase Database · checked Sep 16, 2026
11Partial evidenceAustin, TX, United StatesHQ checked Sep 16, 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 16, 2026
12Partial evidenceDublin, OH, United StatesHQ checked Sep 16, 20261,001-5,0001,388 contacts →

Partial evidence

“IGS Energy has been a trusted energy advisor since 1989, growing into one of the nation’s top energy retailers.”

Source: RevenueBase Database · checked Sep 16, 2026
13Partial evidenceFramingham, MA, United StatesHQ checked Sep 16, 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 16, 2026
14Indirect evidenceOslo, NorwayHQ checked Sep 16, 20261,001-5,0001,150 contacts →

Indirect evidence

“GK er en ledende teknisk entreprenør og servicepartner.”

Source: RevenueBase Database · checked Sep 16, 2026
15Partial evidenceAustin, TX, United StatesHQ checked Sep 16, 2026n/a1,145 contacts →

Partial evidence

“OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.”

Source: RevenueBase Database · checked Sep 16, 2026
16Partial evidenceLondon, United KingdomHQ checked Sep 16, 20265,001-10,0001,064 contacts →

Partial evidence

“Together, we’re delivering technical solutions for a better society and an Electric Britain Dalkia is one of the UK’s leading technical and energy services providers at the…”

Source: RevenueBase Database · checked Sep 16, 2026
17Partial evidenceLondon, United KingdomHQ checked Sep 16, 20261,001-5,0001,007 contacts →

Partial evidence

“Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.”

Source: RevenueBase Database · checked Sep 16, 2026
18Indirect evidenceLehi, UT, United StatesHQ checked Sep 16, 20261,001-5,000960 contacts →

Indirect evidence

“LGCY Power is committed to changing the way the world produces power.”

Source: RevenueBase Database · checked Sep 16, 2026
19Indirect evidenceLondon, United KingdomHQ checked Sep 16, 20261,001-5,000894 contacts →

Indirect evidence

“Anthesis guides clients to sustainable performance.”

Source: RevenueBase Database · checked Sep 16, 2026
20Indirect evidenceAnaheim, CA, United StatesHQ checked Sep 16, 20261,001-5,000851 contacts →

Indirect evidence

“Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.”

Source: RevenueBase Database · checked Sep 16, 2026
21Partial evidencePort Washington, WI, United StatesHQ checked Sep 16, 20261,001-5,000838 contacts →

Partial evidence

“Franklin Energy delivers end-to-end sustainability solutions through a portfolio of intelligent products and services that lower energy costs, reduce carbon and waste, and grow…”

Source: RevenueBase Database · checked Sep 16, 2026
22Partial evidenceOakland, CA, United StatesHQ checked Sep 16, 2026201-500772 contacts →

Partial evidence

“Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.”

Source: RevenueBase Database · checked Sep 16, 2026
23Strong evidenceMumbai, IndiaHQ checked Sep 16, 2026201-500735 contacts →

Strong evidence

“CleanMax is India’s largest commercial and industrial (“C&I”) renewable energy provider with 3 GW of operational, owned and managed capacity.”

Source: RevenueBase Database · checked Sep 16, 2026
24Partial evidenceHalf Moon Bay, CA, United StatesHQ checked Sep 16, 2026501-1,000733 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 16, 2026
25Indirect evidenceSevilla, SpainHQ checked Sep 16, 20261,001-5,000688 contacts →

Indirect evidence

“INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 22,854 commercial energy consultants worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 119,433 reachable decision-makers.

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Commercial energy consultants worldwide at a glance

As of Sep 16, 2026
30.3%Verified-email coverage
17.2Average contacts per company
1-10Median size (employees)
1.8%Largest-city concentration · London
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
13,836
11-50
6,865
51-200
1,556
201-500
299
501-1,000
80
1,001-5,000
78
5,001-10,000
11
10001+
20

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 commercial energy consultants, 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
48 countries, largest first: the United States, the United Kingdom, France, Brazil, Spain, Germany, Italy, India, the Netherlands, Australia and 38 more. Country and city lists for commercial energy consultants are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “commercial energy consultants”. 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 commercial energy consultants), 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 commercial energy consultants, 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, 119,433 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 16, 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.

Commercial energy consultants by location

113 lists · largest first

Every Commercial energy consultants 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 commercial energy consultants, 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 commercial energy consultants are there worldwide?

RevenueBase identified 22,854 commercial energy consultants 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?

Johnson Controls, headquartered in Milwaukee, tops this list with the largest team on record.

Which country has the most commercial energy consultants?

The United States leads with 4,145 companies, followed by the United Kingdom (2,094) and France (1,689). Every commercial energy consultants list by country and city is linked on this page.

Which city has the most commercial energy consultants?

London leads with 407 headquartered companies, followed by Madrid (274) and Paris (257).

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 119,433 verified decision-maker contacts tracked across these 22,854 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 16, 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.