Company lists · Data refreshed November 2026

Top 25 Clean energy engineering companies based in Italy

RevenueBase identified 1,953 company matches for clean energy engineering companies associated with Italy as of November 2026 and tracks 22,518 professional contacts across them, including 6,712 with verified work emails. Milan is the largest hub.

This list covers company matches for clean energy engineering companies associated with Italy, 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 November 6, 2026.

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 Nov 6, 2026 How this list was built
1,953Companies
22,518Contacts tracked
6,712Verified emails
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The 25 largest clean energy engineering companies based in Italy

Ranked by team size
Top 25 of 1,953 company matches for clean energy engineering companies based in Italy, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchPesaro, ItalyHQ recorded Nov 6, 20261,001-5,0001,722 contacts →

Exact match

“Renco S.p.A, an Italian company founded in 1979, is continually committed to providing its Clients with sound business solutions in an ever increasingly complex and challenging…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchRome, ItalyHQ recorded Nov 6, 20261,001-5,000801 contacts →

Exact match

“Management.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchPrato, ItalyHQ recorded Nov 6, 2026n/a792 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 · Nov 6, 2026 · View company records in RevenueBase
4Exact matchCeggia, ItalyHQ recorded Nov 6, 2026501-1,000424 contacts →

Exact match

“SEINGIM began its activities more than 30 years ago in Venice.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchFano, ItalyHQ recorded Nov 6, 2026201-500316 contacts →

Exact match

“Enereco is an independent and privately owned engineering company founded with the purpose of delivering customised, quality engineering and project services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchMilan, ItalyHQ recorded Nov 6, 202651-200244 contacts →

Exact match

“Power Reply is the Reply group company focused on the Energy & Utilities market.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchSesto San Giovanni, ItalyHQ recorded Nov 6, 2026201-500217 contacts →

Exact match

“We are an Engineering & Contracting Company with a portfolio of almost 60 years of experience and 300 completed projects in more than 30 countries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchRome, ItalyHQ recorded Nov 6, 2026201-500212 contacts →

Exact match

“APS was founded in 1997 in Rome, Italy, and became part of the MAIRE Group on July 30th, 2024, following its acquisition by KT – Kinetics Technology.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchCalusco D'adda, ItalyHQ recorded Nov 6, 2026201-500206 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchPadua, ItalyHQ recorded Nov 6, 202651-200193 contacts →

Exact match

“Since June 2025, STE Energy has been acquired by, becoming part of the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchBologna, ItalyHQ recorded Nov 6, 2026501-1,000192 contacts →

Exact match

“Belonging to Italian industrial giant Webuild Group, NBI develops turnkey projects and provides expert advice and intervention with regard to plant design and energy services…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchTurin, ItalyHQ recorded Nov 6, 202651-200181 contacts →

Exact match

“3BA è un gruppo che opera nell'ingegneria e nella consulenza, specializzato in infrastrutture, oil and gas, impianti di produzione di energia, anche da fonti rinnovabili, impianti…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchTurin, ItalyHQ recorded Nov 6, 202651-200173 contacts →

Exact match

“Engineering services for industrial projects brain Technologies provides engineering and scientific services for industrial projects.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchMilan, ItalyHQ recorded Nov 6, 2026501-1,000156 contacts →

Exact match

“DEERNS è una società di consulenza internazionale in grado di fornire servizi di ingegneria per l’ambiente costruito con un approccio integrato e completo.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchRome, ItalyHQ recorded Nov 6, 202651-200152 contacts →

Exact match

“3TI is the largest Italian independent fully employee-owned engineering company ranked in the ENR Top 225 INTERNATIONAL DESIGN FIRMS.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchMilan, ItalyHQ recorded Nov 6, 202651-200137 contacts →

Exact match

“Engineering, development and consulting services for waste management, remediation, renewable energy, industrial and technological plants, natural resources, urban & land…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchMilan, ItalyHQ recorded Nov 6, 202651-200131 contacts →

Exact match

“Tekne S.p.A.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchMilan, ItalyHQ recorded Nov 6, 202651-200123 contacts →

Exact match

“engineering”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchCastellaneta, ItalyHQ recorded Nov 6, 202651-200117 contacts →

Exact match

“Non siamo tecnici, ma progettisti consapevoli di essere parte del cambiamento.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchTrezzano Rosa, ItalyHQ recorded Nov 6, 202651-200102 contacts →

Exact match

“In its current structure, Siel Group is a holding company deeply rooted in a world-class economic, technological, and cultural context.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchMilan, ItalyHQ recorded Nov 6, 202651-20099 contacts →

Exact match

“Engineering Consulting Services ELC Electroconsult S.p.A.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchChieti Scalo, ItalyHQ recorded Nov 6, 2026201-50096 contacts →

Exact match

“L'Almacis trae origine dall'impresa Marramiero che, a partire dagli anni '50, ha avviato la realizzazione di reti e di impianti acquedottistici, di irrigazione e fognari, oltre…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchRome, ItalyHQ recorded Nov 6, 202651-20093 contacts →

Exact match

“Key to Energy is a consulting company made up of a team of professionals with solid experience in main European markets in the retail and wholesale energy sectors.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchPesaro, ItalyHQ recorded Nov 6, 202651-20089 contacts →

Exact match

“Creata nel 1994, Comis s.r.l.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchMilan, ItalyHQ recorded Nov 6, 202651-20088 contacts →

Exact match

“WHO WE ARE SUNNERG is General Contractor and Service Provider specializing in "turnkey projects" in the 'Energy & Facility Management B2B market, with a particular focus on the PV…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 1,953 clean energy engineering companies based in Italy

See the full list, filter by size, metro and specialty, and access 6,712 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Clean energy engineering companies based in Italy at a glance

As of Nov 6, 2026
29.8%Verified-email coverage
11.5Average contacts per company
1-10Median size (employees)
7.2%Largest-city concentration · Milan
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
1,150
11-50
638
51-200
126
201-500
18
501-1,000
10
1,001-5,000
3
5,001-10,000
1
10001+
1

Email recency for this list is measured worldwide rather than for Italy, so it is reported there. Company counts and contact totals on this page are exact for Italy, over 1,953 companies.

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.
What qualifies
Company records associated with Italy whose business descriptions match “clean energy engineering companies” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 6,712 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 November 6, 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.

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 engineering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clean energy engineering companies are there based in Italy?

RevenueBase identified 1,953 company matches for clean energy engineering companies associated with Italy as of November 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?

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

Which city has the most clean energy engineering companies?

Milan leads with 141 company records, followed by Rome (133) and Turin (55).

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 6,712 professional contacts with verified work emails tracked across these 1,953 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 November 6, 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.