Company lists · Data refreshed October 2026

Top 25 Clean energy transition advisors worldwide

Name: Clean energy transition advisors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 9, 2026 9,687 companies tracked

RevenueBase identified 9,687 company matches for clean energy transition advisors worldwide as of October 2026 and tracks 115,569 professional contacts across them, including 39,326 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for clean energy transition advisors 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 9, 2026. Country and city lists for clean energy transition advisors 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 9, 2026 How this list was built

9,687Companies

115,569Contacts tracked

39,326Verified emails

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The 25 largest clean energy transition advisors worldwide

Ranked by team size

Top 25 of 9,687 company matches for clean energy transition advisors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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	Engie Solutions France	Exact match	La Garenne-colombes, FranceHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
2	ERM	Exact match	London, United KingdomHQ recorded Oct 9, 2026	5,001-10,000	9,532 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3	Roland Berger	Exact match	Munich, GermanyHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
4	SLR Consulting	Exact match	London, United KingdomHQ recorded Oct 9, 2026	1,001-5,000	4,083 contacts →
	Exact match “SLR is a committed partner in our clients’ sustainability journeys.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
6	OLA	Exact match	Austin, TX, United StatesHQ recorded Oct 9, 2026	n/a	1,150 contacts →
	Exact match “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7	Wärtsilä Energy	Exact match	Helsinki, FinlandHQ recorded Oct 9, 2026	10001+	965 contacts →
	Exact match “Wärtsilä leads the transition towards a 100% renewable energy future.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8	Anthesis Group	Exact match	London, United KingdomHQ recorded Oct 9, 2026	1,001-5,000	927 contacts →
	Exact match “Anthesis guides clients to sustainable performance.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9	Resource Innovations	Exact match	Half Moon Bay, CA, United StatesHQ recorded Oct 9, 2026	501-1,000	774 contacts →
	Exact match “Resource Innovations (RI) is an energy transformation firm.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10	South Pole	Exact match	Zurich, SwitzerlandHQ recorded Oct 9, 2026	501-1,000	744 contacts →
	Exact match “South Pole is the world's leading carbon asset developer and climate consultancy.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11	WTS Energy	Exact match	The Hague, NetherlandsHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
12	E CO	Exact match	London, United KingdomHQ recorded Oct 9, 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 9, 2026 · View company records in RevenueBase
13	Serentica	Exact match	Gurgaon, IndiaHQ recorded Oct 9, 2026	201-500	526 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14	German Energy Agency Dena	Exact match	Berlin, GermanyHQ recorded Oct 9, 2026	501-1,000	507 contacts →
	Exact match “dena is a centre of excellence for the applied energy transition and climate protection.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15	CRAM	Exact match	Le Havre, FranceHQ recorded Oct 9, 2026	501-1,000	464 contacts →
	Exact match “Nous sommes des femmes et des hommes engagés, qui chaque matin se lèvent avec une mission : être des acteurs clés de la transition énergétique.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16	Inddigo	Exact match	Chambéry, FranceHQ recorded Oct 9, 2026	201-500	448 contacts →
	Exact match “Ingénierie du développement durable” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17	Energy Saving Trust	Exact match	London, United KingdomHQ recorded Oct 9, 2026	201-500	440 contacts →
	Exact match “Energy Saving Trust is an independent organisation dedicated to promoting energy efficiency, low carbon transport and sustainable energy use.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18	TRIO	Exact match	Irvine, CA, United StatesHQ recorded Oct 9, 2026	201-500	387 contacts →
	Exact match “We are Trio – global energy and sustainability advisors.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19	Doris Group	Exact match	Paris, FranceHQ recorded Oct 9, 2026	501-1,000	370 contacts →
	Exact match “DORIS is a leader in the provision of engineering, advisory, and project management services to the energy industry.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20	Greenflex	Exact match	Paris, FranceHQ recorded Oct 9, 2026	501-1,000	368 contacts →
	Exact match “Since 2009, GreenFlex has been a key partner in the energy, environmental and societal transformation of organizations, enabling them to change their trajectory towards an economy…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21	NUS Consulting Group	Exact match	Park Ridge, NJ, United StatesHQ recorded Oct 9, 2026	201-500	360 contacts →
	Exact match “National Utility Service, Inc.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22	EMM Consulting PTY Limited	Exact match	St Leonards, AustraliaHQ recorded Oct 9, 2026	201-500	354 contacts →
	Exact match “At EMM, we believe that a sustainable future is achievable, and we are dedicated to helping our clients and the community make it a reality.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23	Manergy	Exact match	Créteil, FranceHQ recorded Oct 9, 2026	501-1,000	317 contacts →
	Exact match “Depuis plus de 40 ans, MANERGY s’affirme comme une société indépendante de référence, spécialisée dans l’ingénierie et le conseil en transition énergétique et environnementale.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24	EIC Partnership	Exact match	Redditch, United KingdomHQ recorded Oct 9, 2026	51-200	310 contacts →
	Exact match “EIC Partnership: A Legacy of Expertise, A Commitment to Sustainability With origins dating back to 1975, EIC has cultivated nearly 50 years of distinguished service in energy and…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25	3degrees Group, INC	Exact match	San Francisco, CA, United StatesHQ recorded Oct 9, 2026	201-500	309 contacts →
	Exact match “3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Recorded in the RevenueBase company graph · Oct 9, 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 “clean energy transition advisors”. 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 9,687 clean energy transition advisors worldwide

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Clean energy transition advisors worldwide at a glance

As of Oct 9, 2026

34.0%Verified-email coverage

11.9Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · London

Oct 9, 2026Page data refreshed

Companies by employee count

1-10

7,053

11-50

2,091

51-200

382

201-500

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 clean energy transition advisors are linked below.
What qualifies: Company records worldwide whose business descriptions match “clean energy transition advisors” 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 39,326 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 9, 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.

Clean energy transition advisors by location

67 lists · largest first

Every Clean energy transition advisors 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 “clean energy transition advisors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clean energy transition advisors are there worldwide?

RevenueBase identified 9,687 company matches for clean energy transition advisors 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?

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

Which country has the most clean energy transition advisors?

The United States leads with 1,023 companies, followed by the United Kingdom (769) and France (719). Every clean energy transition advisors list by country and city is linked on this page.

Which city has the most clean energy transition advisors?

London leads with 308 company records, followed by Paris (200) and Sao Paulo (101).

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 39,326 professional contacts with verified work emails tracked across these 9,687 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 9, 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.