Company lists · Data refreshed September 2026

Top 25 Energy consultancy services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 28,024 companies tracked

RevenueBase identified 28,024 energy consultancy services worldwide as of September 2026 and tracks 400,538 professional contacts across them, including 109,302 with verified work emails. The United States is the largest market and London the largest hub.

This list covers energy consultancy services 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 21, 2026. Country and city lists for energy consultancy services 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 21, 2026 86% judged on-target in blind review

28,024Companies

400,538Contacts tracked

109,302Verified emails

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The 25 largest energy consultancy services worldwide

Ranked by team size

Top 25 of 28,024 energy consultancy services worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to energy consultancy services: 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Johnson Controls	Partial evidence	Cork, IrelandHQ checked Sep 21, 2026	10001+	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 21, 2026
2	Worley	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	10001+	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 21, 2026
3	WOOD	Partial evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	10001+	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 21, 2026
4	British GAS	Indirect evidence	Windsor, United KingdomHQ checked Sep 21, 2026	10001+	9,238 contacts →
	Indirect evidence “Taking care of things.” Source: RevenueBase Database · checked Sep 21, 2026
5	Dalkia	Indirect evidence	Saint-andré-lez-lille, FranceHQ checked Sep 21, 2026	10001+	8,427 contacts →
	Indirect evidence “Dalkia : ensemble, relevons le défi climatique!” Source: RevenueBase Database · checked Sep 21, 2026
6	Enova By Veolia	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 21, 2026	5,001-10,000	4,058 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 21, 2026
7	FTI	Partial evidence	Menasha, WI, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,741 contacts →
	Partial evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 21, 2026
8	Shell Energy	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	2,627 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 21, 2026
9	Clearesult	Partial evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,121 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 21, 2026
10	Aarvi Encon	Partial evidence	Mumbai, IndiaHQ checked Sep 21, 2026	5,001-10,000	1,890 contacts →
	Partial evidence “Aarvi Encon has established it's leadership in providing Engineering Consultancy and Technical Assistance to Oil & Gas, Refinery, Petrochemical, Pipelines, Power & Infrastructure…” Source: RevenueBase Database · checked Sep 21, 2026
11	Steag Energy Services India Pvt. LTD	Partial evidence	Noida, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,572 contacts →
	Partial evidence “STEAG Energy Services India, established in 2001 as a wholly owned subsidiary of STEAG GmbH, Germany, is now part of the Bluspring Enterprises Limited, India’s integrated…” Source: RevenueBase Database · checked Sep 21, 2026
12	Ameresco	Partial evidence	Framingham, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,383 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 21, 2026
13	Fichtner	Strong evidence	Stuttgart, GermanyHQ checked Sep 21, 2026	1,001-5,000	1,279 contacts →
	Strong evidence “As a leading, independent engineering and consultancy enterprise active in the sectors of energy and infrastructure, Fichtner handles challenging projects in countries all over…” Source: RevenueBase Database · checked Sep 21, 2026
14	GK	Indirect evidence	Oslo, NorwayHQ checked Sep 21, 2026	1,001-5,000	1,150 contacts →
	Indirect evidence “GK er en ledende teknisk entreprenør og servicepartner.” Source: RevenueBase Database · checked Sep 21, 2026
15	Medhaj Techno Concept Pvt. LTD	Indirect evidence	IndiaHQ checked Sep 21, 2026	1,001-5,000	1,136 contacts →
	Indirect evidence “Medhaj Techno Concept Pvt.” Source: RevenueBase Database · checked Sep 21, 2026
16	Aden Group	Partial evidence	SingaporeHQ checked Sep 21, 2026	10001+	1,105 contacts →
	Partial evidence “Aden Group is a Euro-Asian enterprise delivering comprehensive solutions to boost decarbonization, productivity and energy transition in the built environment.” Source: RevenueBase Database · checked Sep 21, 2026
17	Dalkia UK	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	1,064 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 21, 2026
18	Techem Energy Services Gmbh	Partial evidence	Eschborn, GermanyHQ checked Sep 21, 2026	1,001-5,000	1,021 contacts →
	Partial evidence “Techem is a leading global energy service provider for the real estate sector and private homeowners.” Source: RevenueBase Database · checked Sep 21, 2026
19	Penspen	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,007 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 21, 2026
20	World Kinect	Partial evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	998 contacts →
	Partial evidence “Headquartered in Miami, Florida, World Kinect Corporation (NYSE: WKC) is a leading global energy management company, offering a broad suite of solutions across the energy product…” Source: RevenueBase Database · checked Sep 21, 2026
21	Willdan	Indirect evidence	Anaheim, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	851 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 21, 2026
22	Monenco Iran Consulting Engineers	Indirect evidence	Tehran, IranHQ checked Sep 21, 2026	1,001-5,000	785 contacts →
	Indirect evidence “Monenco Iran was formed in 1973 as a joint venture between the private sector of Iran and Montreal Engineering Company of Canada.” Source: RevenueBase Database · checked Sep 21, 2026
23	Energy Solutions	Partial evidence	Oakland, CA, United StatesHQ checked Sep 21, 2026	201-500	772 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 21, 2026
24	Resource Innovations	Partial evidence	Half Moon Bay, CA, United StatesHQ checked Sep 21, 2026	501-1,000	733 contacts →
	Partial evidence “Resource Innovations (RI) is an energy transformation firm.” Source: RevenueBase Database · checked Sep 21, 2026
25	Capco Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	715 contacts →
	Partial evidence “For 25 years Capco’s Energy practice has combined innovative thinking with deep industry knowledge to provide business consulting, digital transformation and technology services…” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: energy consultancy services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names energy consultancy services.
Partial evidence: Its own public description names part of energy consultancy services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy consultancy services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 28,024 energy consultancy services worldwide

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Energy consultancy services worldwide at a glance

As of Sep 21, 2026

27.3%Verified-email coverage

14.3Average contacts per company

1-10Median size (employees)

1.4%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

17,635

11-50

7,793

51-200

1,877

201-500

333

501-1,000

109

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 energy consultancy services, 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: Every country. Country and city lists for energy consultancy services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “energy consultancy services”. 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 energy consultancy services), 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 energy consultancy services, 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, 109,302 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 21, 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.

Energy consultancy services by location

112 lists · largest first

Every Energy consultancy 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 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 energy consultancy services, 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 energy consultancy services are there worldwide?

RevenueBase identified 28,024 energy consultancy services 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 energy consultancy services?

The United States leads with 2,983 companies, followed by the United Kingdom (2,166) and France (1,815). Every energy consultancy services list by country and city is linked on this page.

Which city has the most energy consultancy services?

London leads with 399 headquartered companies, followed by Madrid (290) and Paris (250).

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 109,302 verified decision-maker contacts tracked across these 28,024 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 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 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.