Company lists · Data refreshed September 2026

Top 25 Sustainable fuels consulting firms worldwide

RevenueBase identified 5,922 company matches for sustainable fuels consulting firms worldwide as of September 2026 and tracks 50,338 professional contacts across them, including 14,918 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for sustainable fuels consulting 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 September 29, 2026. Country and city lists for sustainable fuels consulting 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 Sep 29, 2026 How this list was built
5,922Companies
50,338Contacts tracked
14,918Verified emails
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The 25 largest sustainable fuels consulting firms worldwide

Ranked by team size
Top 25 of 5,922 company matches for sustainable fuels consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchAustin, TX, United StatesHQ recorded Sep 29, 2026n/a1,145 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 · Sep 29, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,0001,007 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchMedellín | Bogotá | Lima | Miami | Nueva Delhi, ColombiaHQ recorded Sep 29, 20261,001-5,000709 contacts →

Exact match

“Over six decades offering our consultancy services locally and internationally, based on ethical principles and commitments, always through honest, socially responsible actions…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchSevilla, SpainHQ recorded Sep 29, 20261,001-5,000688 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchSeville, SpainHQ recorded Sep 29, 2026501-1,000502 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 · Sep 29, 2026 · View company records in RevenueBase
6Exact matchCastle Douglas, United KingdomHQ recorded Sep 29, 2026501-1,000500 contacts →

Exact match

“Natural Power is a leading independent consultancy and service provider for the renewable energy sector.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchStockport, United KingdomHQ recorded Sep 29, 202651-200418 contacts →

Exact match

“Fichtner is one of the world's leading independent engineering consultancy firms.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchParis, FranceHQ recorded Sep 29, 2026501-1,000390 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 · Sep 29, 2026 · View company records in RevenueBase
9Exact matchIrvine, CA, United StatesHQ recorded Sep 29, 2026201-500383 contacts →

Exact match

“We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchParis, FranceHQ recorded Sep 29, 2026501-1,000365 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 · Sep 29, 2026 · View company records in RevenueBase
11Exact matchSt Leonards, AustraliaHQ recorded Sep 29, 2026201-500361 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 · Sep 29, 2026 · View company records in RevenueBase
12Exact matchVancouver, BC, CanadaHQ recorded Sep 29, 2026201-500351 contacts →

Exact match

“Triton Environmental Consultants knows western Canada.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchBarcelona, SpainHQ recorded Sep 29, 2026n/a351 contacts →

Exact match

“Ingeniería y Consultoría Energética orientada a la búsqueda y el desarrollo de soluciones energéticas de alta eficiencia para sus Clientes.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchAppleton, WI, United StatesHQ recorded Sep 29, 20261,001-5,000324 contacts →

Exact match

“U.S.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchAustraliaHQ recorded Sep 29, 2026n/a320 contacts →

Exact match

“Management Consulting in the Energy Sector”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchRedditch, United KingdomHQ recorded Sep 29, 202651-200316 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 · Sep 29, 2026 · View company records in RevenueBase
17Exact matchGainesville, FL, United StatesHQ recorded Sep 29, 2026201-500305 contacts →

Exact match

“Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchMadrid, SpainHQ recorded Sep 29, 2026201-500298 contacts →

Exact match

“SÓLIDA, a Bureau Veritas Company, is an independent company founded in 2007 that provides high added-value engineering and consulting services within the renewable energy sector.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchDuluth, MN, United StatesHQ recorded Sep 29, 2026201-500281 contacts →

Exact match

“We act as an extension of your team, combining deep energy expertise with seamless alignment to your processes to advance projects with confidence.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchVilleurbanne, FranceHQ recorded Sep 29, 2026201-500278 contacts →

Exact match

“Créé en 1991, reconnu comme l’un des meilleurs cabinets français spécialiste de la transformation écologique, EODD ingénieurs conseils apporte sa vision transversale et ses…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchAustin, CA, United StatesHQ recorded Sep 29, 2026201-500275 contacts →

Exact match

“The world runs on power.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchMinneapolis, MN, United StatesHQ recorded Sep 29, 2026201-500264 contacts →

Exact match

“Merjent is an environmental, restoration, and engineering consulting firm with a long history serving the energy industry.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchKirkland, WA, United StatesHQ recorded Sep 29, 2026201-500254 contacts →

Exact match

“We provide global renewable energy consulting services, focused on empowering clients to navigate the complexities of the energy transition.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchMadrid, United KingdomHQ recorded Sep 29, 202651-200241 contacts →

Exact match

“VALORA is a consulting company who focus its activity towards a new professional innovative and thrilling challenge.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchCórdoba, SpainHQ recorded Sep 29, 2026201-500234 contacts →

Exact match

“ECOINTEGRAL INGENIERÍA is an independent company of advanced engineering and consulting firm that operates in 3 areas of expertise: Energy, Telecommunications and Environment.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 5,922 sustainable fuels consulting firms worldwide

See the full list, filter by size, metro and specialty, and access 14,918 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Sustainable fuels consulting firms worldwide at a glance

As of Sep 29, 2026
29.6%Verified-email coverage
8.5Average contacts per company
1-10Median size (employees)
1.6%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
4,037
11-50
1,480
51-200
280
201-500
59
501-1,000
19
1,001-5,000
18
5,001-10,000
2
10001+
3

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 sustainable fuels consulting firms are linked below.
What qualifies
Company records worldwide whose business descriptions match “sustainable fuels consulting 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 14,918 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 29, 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.

Sustainable fuels consulting firms by location

36 lists · largest first

Every Sustainable fuels consulting 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 “sustainable fuels consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sustainable fuels consulting firms are there worldwide?

RevenueBase identified 5,922 company matches for sustainable fuels consulting firms 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?

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

Which country has the most sustainable fuels consulting firms?

The United States leads with 638 companies, followed by Brazil (408) and the United Kingdom (331). Every sustainable fuels consulting firms list by country and city is linked on this page.

Which city has the most sustainable fuels consulting firms?

London leads with 96 company records, followed by Madrid (65) and Houston (56).

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 14,918 professional contacts with verified work emails tracked across these 5,922 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 29, 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.