Company lists · Data refreshed September 2026

Top 25 Renewable energy consulting companies worldwide

Name: Renewable energy consulting companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 19,909 companies tracked

RevenueBase identified 19,909 renewable energy consulting companies worldwide as of September 2026 and tracks 251,379 professional contacts across them, including 73,890 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers renewable energy consulting companies 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 17, 2026. Country and city lists for renewable energy consulting companies 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 17, 2026 86% judged on-target in blind review

19,909Companies

251,379Contacts tracked

73,890Verified emails

0Mobile numbers

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The 25 largest renewable energy consulting companies worldwide

Ranked by team size

Top 25 of 19,909 renewable energy consulting companies worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy consulting companies: 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	Worley	Partial evidence	Sydney, AustraliaHQ checked Sep 17, 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 17, 2026
2	Dalkia	Indirect evidence	Saint-andré-lez-lille, FranceHQ checked Sep 17, 2026	10001+	8,427 contacts →
	Indirect evidence “Dalkia : ensemble, relevons le défi climatique!” Source: RevenueBase Database · checked Sep 17, 2026
3	FTI	Strong evidence	Menasha, WI, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,741 contacts →
	Strong evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 17, 2026
4	Waaree Group	Strong evidence	Mumbai, IndiaHQ checked Sep 17, 2026	5,001-10,000	2,264 contacts →
	Strong evidence “Founded in 1990, Waaree Energies Limited is India’s leading renewable energy company, driving the global transition to clean power.” Source: RevenueBase Database · checked Sep 17, 2026
5	Semco Maritime	Strong evidence	Esbjerg, DenmarkHQ checked Sep 17, 2026	1,001-5,000	1,947 contacts →
	Strong evidence “To fulfil the vision of a fossil-free future, we need conventional and renewable energy sources to coexist effectively until the day when renewables can fully keep the world…” Source: RevenueBase Database · checked Sep 17, 2026
6	Vulcain Engineering Group	Strong evidence	Neuilly-sur-seine, FranceHQ checked Sep 17, 2026	5,001-10,000	1,496 contacts →
	Strong evidence “Vulcain Engineering Group is a multi-specialist engineering and consulting group serving industrial companies across the globe, focused on critical sectors: energy, health…” Source: RevenueBase Database · checked Sep 17, 2026
7	Voltalia	Strong evidence	Paris, FranceHQ checked Sep 17, 2026	1,001-5,000	1,436 contacts →
	Strong evidence “Voltalia is an international player in renewable energies.” Source: RevenueBase Database · checked Sep 17, 2026
8	Fichtner	Partial evidence	Stuttgart, GermanyHQ checked Sep 17, 2026	1,001-5,000	1,279 contacts →
	Partial 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 17, 2026
9	Penspen	Partial evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
10	Inox Wind LTD	Partial evidence	Noida, IndiaHQ checked Sep 17, 2026	1,001-5,000	952 contacts →
	Partial evidence “Inox Wind is India’s leading wind energy solutions provider, offering comprehensive services from concept to commissioning and Operations & Maintenance (O&M).” Source: RevenueBase Database · checked Sep 17, 2026
11	Wärtsilä Energy	Strong evidence	Helsinki, FinlandHQ checked Sep 17, 2026	10001+	940 contacts →
	Strong evidence “Wärtsilä leads the transition towards a 100% renewable energy future.” Source: RevenueBase Database · checked Sep 17, 2026
12	Wanzek Construction, Inc., A Mastec Company	Strong evidence	Fargo, ND, United StatesHQ checked Sep 17, 2026	1,001-5,000	933 contacts →
	Strong evidence “Wanzek Construction, Inc, a MasTec Renewables company, is a leading general construction contractor and clean energy services company headquartered in Fargo, North Dakota.” Source: RevenueBase Database · checked Sep 17, 2026
13	Willdan	Partial evidence	Anaheim, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	851 contacts →
	Partial 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 17, 2026
14	Juwi Group	Strong evidence	Wörrstadt, GermanyHQ checked Sep 17, 2026	1,001-5,000	785 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
15	NWG S.P.A	Indirect evidence	Prato, ItalyHQ checked Sep 17, 2026	n/a	766 contacts →
	Indirect evidence “Nata a Prato nel 2003 è oggi una delle più importanti realtà nel mercato della Green Economy.” Source: RevenueBase Database · checked Sep 17, 2026
16	Cleanmax	Strong evidence	Mumbai, IndiaHQ checked Sep 17, 2026	201-500	735 contacts →
	Strong evidence “CleanMax is India’s largest commercial and industrial (“C&I”) renewable energy provider with 3 GW of operational, owned and managed capacity.” Source: RevenueBase Database · checked Sep 17, 2026
17	GES	Indirect evidence	Zamudio, SpainHQ checked Sep 17, 2026	501-1,000	702 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
18	Inerco	Indirect evidence	Sevilla, SpainHQ checked Sep 17, 2026	1,001-5,000	688 contacts →
	Indirect evidence “INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Source: RevenueBase Database · checked Sep 17, 2026
19	Schwager	Indirect evidence	Santiago, ChileHQ checked Sep 17, 2026	501-1,000	671 contacts →
	Indirect evidence “Misión En todas sus áreas de negocios, SCHWAGER proveerá servicios y bienes de excelencia, ofreciendo, confianza y credibilidad a nuestros clientes, colaboradores y accionistas…” Source: RevenueBase Database · checked Sep 17, 2026
20	Vikran Engineering LTD	Strong evidence	Thane, IndiaHQ checked Sep 17, 2026	501-1,000	661 contacts →
	Strong evidence “M/s VIKRAN Engineering Ltd is a reputed and established engineering company specializing in providing comprehensive solutions in the fields of renewable energy, engineering…” Source: RevenueBase Database · checked Sep 17, 2026
21	WTS Energy	Partial evidence	The Hague, NetherlandsHQ checked Sep 17, 2026	1,001-5,000	651 contacts →
	Partial evidence “The Energy Transition brings new challenges and opportunities to all of us.” Source: RevenueBase Database · checked Sep 17, 2026
22	Depcom Power, INC	Partial evidence	Scottsdale, AZ, United StatesHQ checked Sep 17, 2026	1,001-5,000	624 contacts →
	Partial evidence “DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Source: RevenueBase Database · checked Sep 17, 2026
23	Juniper Green Energy	Partial evidence	Gurugram, IndiaHQ checked Sep 17, 2026	501-1,000	583 contacts →
	Partial evidence “Juniper Green Energy Ltd.” Source: RevenueBase Database · checked Sep 17, 2026
24	ACV Tecline Engenharia Ltda	Partial evidence	Curitiba, BrazilHQ checked Sep 17, 2026	501-1,000	557 contacts →
	Partial evidence “A ACV Tecline é uma empresa especializada na prestação de serviços voltados, principalmente, para empresas do setor de energia, com destaque para as áreas de petróleo e gás.” Source: RevenueBase Database · checked Sep 17, 2026
25	Fourth Partner Energy	Strong evidence	Hyderabad, IndiaHQ checked Sep 17, 2026	201-500	548 contacts →
	Strong evidence “Fourth Partner Energy is India’s leading Renewable Energy firm focusing on building and financing Solar, Wind, Hybrid and Battery Storage projects/ solutions for commercial…” Source: RevenueBase Database · checked Sep 17, 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: renewable energy consulting companies. 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 renewable energy consulting companies.
Partial evidence: Its own public description names part of renewable energy consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy consulting companies. 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 19,909 renewable energy consulting companies worldwide

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Renewable energy consulting companies worldwide at a glance

As of Sep 17, 2026

29.4%Verified-email coverage

12.6Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11,861

11-50

6,020

51-200

1,435

201-500

328

501-1,000

1,001-5,000

5,001-10,000

10001+

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 renewable energy consulting companies, 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: 53 countries, largest first: the United States, Brazil, Germany, the United Kingdom, France, Spain, India, Italy, Türkiye, the Netherlands and 43 more. Country and city lists for renewable energy consulting companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “renewable energy consulting companies”. 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 renewable energy consulting companies), 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 renewable energy consulting companies, 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, 73,890 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 17, 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.

Renewable energy consulting companies by location

111 lists · largest first

Every Renewable energy consulting companies 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 renewable energy consulting companies, 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 renewable energy consulting companies are there worldwide?

RevenueBase identified 19,909 renewable energy consulting companies 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?

Worley, headquartered in Sydney, tops this list with the largest team on record.

Which country has the most renewable energy consulting companies?

The United States leads with 2,449 companies, followed by Brazil (1,535) and Germany (1,479). Every renewable energy consulting companies list by country and city is linked on this page.

Which city has the most renewable energy consulting companies?

London leads with 306 headquartered companies, followed by Madrid (261) and Paris (191).

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 73,890 verified decision-maker contacts tracked across these 19,909 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 17, 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.