Company lists · Data refreshed October 2026

Top 25 Green energy consultants worldwide

Name: Green energy consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 23,012 companies tracked

RevenueBase identified 23,012 company matches for green energy consultants worldwide as of October 2026 and tracks 199,954 professional contacts across them, including 54,812 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for green energy consultants 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 13, 2026. Country and city lists for green energy consultants 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 13, 2026 How this list was built

23,012Companies

199,954Contacts tracked

54,812Verified emails

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The 25 largest green energy consultants worldwide

Ranked by team size

Top 25 of 23,012 company matches for green energy consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 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	ERM	Exact match	London, United KingdomHQ recorded Oct 13, 2026	5,001-10,000	9,532 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2	Dalkia	Exact match	Saint-andré-lez-lille, FranceHQ recorded Oct 13, 2026	10001+	8,823 contacts →
	Exact match “Dalkia : ensemble, relevons le défi climatique!” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
4	OLA	Exact match	Austin, TX, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
5	Wanzek Construction, Inc., A Mastec Company	Exact match	Fargo, ND, United StatesHQ recorded Oct 13, 2026	1,001-5,000	946 contacts →
	Exact match “Wanzek Construction, Inc, a MasTec Renewables company, is a leading general construction contractor and clean energy services company headquartered in Fargo, North Dakota.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
7	Cleanmax	Exact match	Mumbai, IndiaHQ recorded Oct 13, 2026	201-500	809 contacts →
	Exact match “CleanMax is India’s largest commercial and industrial (“C&I”) renewable energy provider with 3 GW of operational, owned and managed capacity.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	NWG S.P.A	Exact match	Prato, ItalyHQ recorded Oct 13, 2026	n/a	755 contacts →
	Exact match “Nata a Prato nel 2003 è oggi una delle più importanti realtà nel mercato della Green Economy.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9	Juwi Group	Exact match	Wörrstadt, GermanyHQ recorded Oct 13, 2026	1,001-5,000	751 contacts →
	Exact match “For 30 years, we have been one of the leading specialists in renewable energies, offering complete project development and other services related to the planning, construction…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10	Schwager	Exact match	Santiago, ChileHQ recorded Oct 13, 2026	501-1,000	737 contacts →
	Exact match “Misión En todas sus áreas de negocios, SCHWAGER proveerá servicios y bienes de excelencia, ofreciendo, confianza y credibilidad a nuestros clientes, colaboradores y accionistas…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	Inerco	Exact match	Seville, SpainHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
12	Vikran Engineering LTD	Exact match	Thane, IndiaHQ recorded Oct 13, 2026	501-1,000	703 contacts →
	Exact match “M/s VIKRAN Engineering Ltd is a reputed and established engineering company specializing in providing comprehensive solutions in the fields of renewable energy, engineering…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	Depcom Power, INC	Exact match	Scottsdale, AZ, United StatesHQ recorded Oct 13, 2026	1,001-5,000	631 contacts →
	Exact match “DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	Grupotec	Exact match	Valencia, SpainHQ recorded Oct 13, 2026	501-1,000	560 contacts →
	Exact match “GRUPOTEC - Empresa multidisciplinar de ingeniería y arquitectura y líder en el sector de la energía fotovoltaica.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15	Revergy	Exact match	Seville, SpainHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
16	Amara Nzero Brasil	Exact match	Salvador, BrazilHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
17	Natural Power	Exact match	Castle Douglas, United KingdomHQ recorded Oct 13, 2026	501-1,000	517 contacts →
	Exact match “Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	SSE Airtricity	Exact match	IrelandHQ recorded Oct 13, 2026	501-1,000	502 contacts →
	Exact match “SSE Airtricity has been harnessing our greatest natural resource for the past 25 years, providing cleaner, renewable energy† for homes and businesses across the country.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19	Elera Renováveis	Exact match	São Paulo, BrazilHQ recorded Oct 13, 2026	501-1,000	486 contacts →
	Exact match “Nossa energia vem do sol, do vento e da água.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	Groupe Coriance	Exact match	Noisy-le-grand, FranceHQ recorded Oct 13, 2026	501-1,000	485 contacts →
	Exact match “Pour une énergie propre et mieux utilisée Notre mission : fournir des solutions énergétiques performantes et économiques, tout en minimisant l'impact environnemental.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21	VSB Group	Exact match	Dresden, GermanyHQ recorded Oct 13, 2026	201-500	484 contacts →
	Exact match “The VSB Group is headquartered in Dresden and is one of the leading full-service providers in the field of renewable energy.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	Borea Construction	Exact match	Lévis, QC, CanadaHQ recorded Oct 13, 2026	201-500	475 contacts →
	Exact match “Borea Construction est le leader nord-américain dans la construction d'énergie renouvelable.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	ADP Consulting	Exact match	Melbourne, AustraliaHQ recorded Oct 13, 2026	201-500	460 contacts →
	Exact match “ADP Consulting, an Ayesa company, is a sustainability-led engineering consultancy on a quest to inspire a better world through influence and design.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24	Energiewacht	Exact match	Zwolle, NetherlandsHQ recorded Oct 13, 2026	1,001-5,000	454 contacts →
	Exact match “Welkom in de boeiende wereld van de energietransitie.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25	Tecno Group	Exact match	Naples, ItalyHQ recorded Oct 13, 2026	201-500	430 contacts →
	Exact match “We are an Energy Digital and Sustainable Company specialized in sustainability consulting services and 4.0 solutions.” Recorded in the RevenueBase company graph · Oct 13, 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 “green energy consultants”. 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 23,012 green energy consultants worldwide

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Green energy consultants worldwide at a glance

As of Oct 13, 2026

27.4%Verified-email coverage

8.7Average contacts per company

1-10Median size (employees)

1.1%Largest-city concentration · London

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

14,130

11-50

6,827

51-200

1,518

201-500

300

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 green energy consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “green energy consultants” 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 54,812 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 13, 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.

Green energy consultants by location

114 lists · largest first

Every Green 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 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 “green energy consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many green energy consultants are there worldwide?

RevenueBase identified 23,012 company matches for green energy consultants 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?

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

Which country has the most green energy consultants?

The United States leads with 2,782 companies, followed by Brazil (1,454) and the United Kingdom (1,378). Every green energy consultants list by country and city is linked on this page.

Which city has the most green energy consultants?

London leads with 259 company records, followed by Madrid (199) and Sao Paulo (164).

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 54,812 professional contacts with verified work emails tracked across these 23,012 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 13, 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.