Company lists · Data refreshed October 2026

Top 25 Energy transition advisory firms worldwide

Name: Energy transition advisory firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 18,189 companies tracked

RevenueBase identified 18,189 company matches for energy transition advisory firms worldwide as of October 2026 and tracks 245,673 professional contacts across them, including 81,032 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for energy transition advisory firms 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 October 12, 2026. Country and city lists for energy transition advisory firms 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 Oct 12, 2026 How this list was built

18,189Companies

245,673Contacts tracked

81,032Verified emails

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The 25 largest energy transition advisory firms worldwide

Ranked by team size

Top 25 of 18,189 company matches for energy transition advisory firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 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	Worley	Exact match	Sydney, AustraliaHQ recorded Oct 12, 2026	10001+	35,018 contacts →
	Exact match “Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	Engie Solutions France	Exact match	La Garenne-colombes, FranceHQ recorded Oct 12, 2026	10001+	11,566 contacts →
	Exact match “Les activités Infrastructures Energétiques Locales d’ENGIE accompagnent les collectivités, les industries et le secteur du bâtiment sur la voie de la décarbonation.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	ERM	Exact match	London, United KingdomHQ recorded Oct 12, 2026	5,001-10,000	9,532 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Dalkia	Exact match	Saint-andré-lez-lille, FranceHQ recorded Oct 12, 2026	10001+	8,823 contacts →
	Exact match “Dalkia : ensemble, relevons le défi climatique!” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	Roland Berger	Exact match	Munich, GermanyHQ recorded Oct 12, 2026	1,001-5,000	4,936 contacts →
	Exact match “Roland Berger is the only leading global strategy consultancy of European origin.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Oct 12, 2026	1,001-5,000	2,206 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 · Oct 12, 2026 · View company records in RevenueBase
7	Baycurrent	Exact match	港区, JapanHQ recorded Oct 12, 2026	5,001-10,000	2,164 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,661 contacts →
	Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	1,513 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 · Oct 12, 2026 · View company records in RevenueBase
10	Fichtner	Exact match	Stuttgart, GermanyHQ recorded Oct 12, 2026	1,001-5,000	1,349 contacts →
	Exact match “As a leading, independent engineering and consultancy enterprise active in the sectors of energy and infrastructure, Fichtner handles challenging projects in countries all over…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Aurora Energy Research	Exact match	Oxford, FranceHQ recorded Oct 12, 2026	1,001-5,000	1,123 contacts →
	Exact match “Established in 2013, Aurora Energy Research is a leading global provider of power market forecasting and analytics for critical investment and financing decisions.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Wärtsilä Energy	Exact match	Helsinki, FinlandHQ recorded Oct 12, 2026	10001+	965 contacts →
	Exact match “Wärtsilä leads the transition towards a 100% renewable energy future.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	Anthesis Group	Exact match	London, United KingdomHQ recorded Oct 12, 2026	1,001-5,000	927 contacts →
	Exact match “Anthesis guides clients to sustainable performance.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Oct 12, 2026	1,001-5,000	872 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 · Oct 12, 2026 · View company records in RevenueBase
15	Capco Energy	Exact match	Houston, TX, United StatesHQ recorded Oct 12, 2026	1,001-5,000	844 contacts →
	Exact match “For 25 years Capco’s Energy practice has combined innovative thinking with deep industry knowledge to provide business consulting, digital transformation and technology services…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Oct 12, 2026	1,001-5,000	843 contacts →
	Exact match “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Energy Solutions	Exact match	Oakland, CA, United StatesHQ recorded Oct 12, 2026	201-500	792 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 · Oct 12, 2026 · View company records in RevenueBase
18	Resource Innovations	Exact match	Half Moon Bay, CA, United StatesHQ recorded Oct 12, 2026	501-1,000	774 contacts →
	Exact match “Resource Innovations (RI) is an energy transformation firm.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Inerco	Exact match	Seville, SpainHQ recorded Oct 12, 2026	1,001-5,000	735 contacts →
	Exact match “INERCO is a multinational technology company specialising in sustainability.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Electric Power Engineers	Exact match	Austin, TX, United StatesHQ recorded Oct 12, 2026	501-1,000	678 contacts →
	Exact match “Electric Power Engineers (EPE) is a global advisory and engineering firm advancing grid reliability, resilience, flexibility, and affordability.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	WTS Energy	Exact match	The Hague, NetherlandsHQ recorded Oct 12, 2026	1,001-5,000	654 contacts →
	Exact match “The Energy Transition brings new challenges and opportunities to all of us.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	E CO	Exact match	London, United KingdomHQ recorded Oct 12, 2026	n/a	639 contacts →
	Exact match “For over 26 years, our consultants have been supporting and guiding our clients to achieve low-carbon climate-resilient development.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	Ricardo PLC	Exact match	London, United KingdomHQ recorded Oct 12, 2026	1,001-5,000	627 contacts →
	Exact match “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	Revergy	Exact match	Seville, SpainHQ recorded Oct 12, 2026	501-1,000	538 contacts →
	Exact match “REVERGY nace mediante un proyecto de profesionales procedentes de diferentes ámbitos del sector de las energías renovables con el fin de presentar un proyecto marcado por la…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	Amara Nzero Brasil	Exact match	Salvador, BrazilHQ recorded Oct 12, 2026	501-1,000	531 contacts →
	Exact match “Somos uma empresa com uma grande experiência integral em energia sustentável fortemente comprometida com a Transição Energética.” Recorded in the RevenueBase company graph · Oct 12, 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 transition advisory firms”. 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 18,189 energy transition advisory firms worldwide

See the full list, filter by size, metro and specialty, and access 81,032 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy transition advisory firms worldwide at a glance

As of Oct 12, 2026

33.0%Verified-email coverage

13.5Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · London

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

12,531

11-50

4,415

51-200

867

201-500

174

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 transition advisory firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “energy transition advisory firms” 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 81,032 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 October 12, 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 transition advisory firms by location

105 lists · largest first

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

How many energy transition advisory firms are there worldwide?

RevenueBase identified 18,189 company matches for energy transition advisory firms worldwide as of October 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?

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

Which country has the most energy transition advisory firms?

The United States leads with 2,283 companies, followed by the United Kingdom (1,248) and France (1,173). Every energy transition advisory firms list by country and city is linked on this page.

Which city has the most energy transition advisory firms?

London leads with 465 company records, followed by Paris (274) and Madrid (195).

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 81,032 professional contacts with verified work emails tracked across these 18,189 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 October 12, 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.