Company lists · Data refreshed September 2026

Top 25 Renewable energy consultancy companies based in Italy

Name: Renewable energy consultancy companies based in Italy
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,600 companies tracked

RevenueBase identified 1,600 renewable energy consultancy companies headquartered in Italy as of September 2026 and tracks 13,157 professional contacts across them, including 3,649 with verified work emails and 550 with mobile numbers. Roma is the largest hub.

This list covers renewable energy consultancy companies headquartered in Italy, 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

1,600Companies

13,157Contacts tracked

3,649Verified emails

550Mobile numbers

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The 25 largest renewable energy consultancy companies based in Italy

Ranked by team size

Top 25 of 1,600 renewable energy consultancy companies based in Italy, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names renewable energy consultancy companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	NWG S.P.AIndirect evidence	Prato, ItalyHQ checked Sep 5, 2026	n/a	766
	“Nata a Prato nel 2003 è oggi una delle più importanti realtà nel mercato della Green Economy.” Source: company website · checked Sep 5, 2026
2	Sime S.R.LPartial evidence	Rosignano Solvay, ItalyHQ checked Sep 5, 2026	201-500	199
	“Established in 1989 as an Oil and Gas engineering firm, Sime is now a Group of Companies inspired by its past but future oriented, with special focus on energy transition.” Source: company website · checked Sep 5, 2026
3	STE EnergyPartial evidence	Padova, ItalyHQ checked Sep 5, 2026	51-200	194
	“Since June 2025, STE Energy has been acquired by, becoming part of the world.” Source: company website · checked Sep 5, 2026
4	NBI SPAPartial evidence	Bologna, ItalyHQ checked Sep 5, 2026	501-1,000	184
	“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…” Source: company website · checked Sep 5, 2026
5	3ba GroupPartial evidence	Torino, ItalyHQ checked Sep 5, 2026	51-200	171
	“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…” Source: company website · checked Sep 5, 2026
6	Espe S.P.AIndirect evidence	Grantorto, ItalyHQ checked Sep 5, 2026	51-200	144
	“Know-how, experience, reliability, innovation.” Source: company website · checked Sep 5, 2026
7	Tozzi Green S.P.APartial evidence	Mezzano, ItalyHQ checked Sep 5, 2026	201-500	132
	“Tozzi Green è una società specializzata in servizi e progetti per lo sviluppo d’impianti e per la generazione di energia da fonti rinnovabili.” Source: company website · checked Sep 5, 2026
8	Montana S.P.AStrong evidence	Milano, ItalyHQ checked Sep 5, 2026	51-200	129
	“Engineering, development and consulting services for waste management, remediation, renewable energy, industrial and technological plants, natural resources, urban & land…” Source: company website · checked Sep 5, 2026
9	Asja EnergyPartial evidence	Rivoli, ItalyHQ checked Sep 5, 2026	201-500	114
	“Asja is an International group of companies that design, build and manage renewable power plants.” Source: company website · checked Sep 5, 2026
10	Ivpc GroupPartial evidence	Avellino, ItalyHQ checked Sep 5, 2026	201-500	110
	“Uno dei principali gruppi a livello nazionale nel settore delle energie rinnovabili.” Source: company website · checked Sep 5, 2026
11	Siel S.P.AIndirect evidence	Trezzano Rosa, ItalyHQ checked Sep 5, 2026	51-200	100
	“In its current structure, Siel Group is a holding company deeply rooted in a world-class economic, technological, and cultural context.” Source: company website · checked Sep 5, 2026
12	GreenergyIndirect evidence	Castellaneta, ItalyHQ checked Sep 5, 2026	51-200	99
	“Non siamo tecnici, ma progettisti consapevoli di essere parte del cambiamento.” Source: company website · checked Sep 5, 2026
13	ELC Electroconsult S.P.AIndirect evidence	Milan, ItalyHQ checked Sep 5, 2026	51-200	98
	“Engineering Consulting Services ELC Electroconsult S.p.A.” Source: company website · checked Sep 5, 2026
14	BFPPartial evidence	Modugno, ItalyHQ checked Sep 5, 2026	11-50	95
	“BFP Group is an engineering & consultancy firm with international offices, applying ten years of experience to offer services worldwide across various sectors, including civil and…” Source: company website · checked Sep 5, 2026
15	KEY To EnergyPartial evidence	Roma, ItalyHQ checked Sep 5, 2026	51-200	94
	“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.” Source: company website · checked Sep 5, 2026
16	PEF SPAPartial evidence	Barberino Tavarnelle, ItalyHQ checked Sep 5, 2026	11-50	93
	“PEF SpA nasce a Firenze nel 2006, iniziando ad operare nel settore delle energie rinnovabili, con la commercializzazione su tutto il territorio nazionale di impianti fotovoltaici…” Source: company website · checked Sep 5, 2026
17	Delos PowerIndirect evidence	Milano, ItalyHQ checked Sep 5, 2026	51-200	85
	“Ogni giorno, lavoriamo per generare un impatto positivo sull'ambiente e sulla società.” Source: company website · checked Sep 5, 2026
18	Italia GAS E LuceStrong evidence	Camaiore, ItalyHQ checked Sep 5, 2026	51-200	83
	“Advanced industrial knowledge and detailed research help us deliver renewable and cost-effective energy to tens of thousands of businesses and homes around the world.” Source: company website · checked Sep 5, 2026
19	RR GroupPartial evidence	Montebelluna, ItalyHQ checked Sep 5, 2026	11-50	81
	“RR GROUP è un’azienda che da 10 anni offre consulenza alle aziende e ai privati sulla fornitura di energia elettrica e gas naturale.” Source: company website · checked Sep 5, 2026
20	EOS Consulting S.P.APartial evidence	Roma, ItalyHQ checked Sep 5, 2026	11-50	66
	“EOS Consulting è una Advisory Firm, nel settore Energy, Real Estate & Infrastructures, operativa da 20 anni e nata con un’idea guida: la conoscenza come strumento per migliorare.” Source: company website · checked Sep 5, 2026
21	Ambiente Italia S.R.LIndirect evidence	Milan, ItalyHQ checked Sep 5, 2026	11-50	64
	“Ambiente Italia is a research and consulting institute working in environmental and territorial planning and analysis.” Source: company website · checked Sep 5, 2026
22	Unoenergy Green Solutions SPAIndirect evidence	Cascina, ItalyHQ checked Sep 5, 2026	201-500	63
	“Unoenergy Green Solutions è una società del Gruppo Unoenergy che opera su tutto il territorio nazionale attraverso la vendita e l’installazione di sistemi per l’efficientamento…” Source: company website · checked Sep 5, 2026
23	ConnectoPartial evidence	Milan, ItalyHQ checked Sep 5, 2026	11-50	59
	“Connecto è una società indipendente di servizi di consulenza e di vendita di soluzioni energetiche integrate che opera con due principi: visione prospettica e prossimità al…” Source: company website · checked Sep 5, 2026
24	Energy ItalyPartial evidence	Costermano Sul Garda, ItalyHQ checked Sep 5, 2026	11-50	59
	“Energy Italy SpA, azienda parte del gruppo Energy Holding, dal 2012 è tra le realtà più innovative nel settore delle energie rinnovabili e del risparmio energetico.” Source: company website · checked Sep 5, 2026
25	EVA Energie ValsabbiaPartial evidence	Gavardo, ItalyHQ checked Sep 5, 2026	51-200	57
	“EVA: il tuo partner per un futuro energetico sostenibile.” Source: company website · checked Sep 5, 2026

Showing 25 of 1,600 renewable energy consultancy companies based in Italy

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Renewable energy consultancy companies based in Italy at a glance

As of Sep 5, 2026

1-10Median size (employees)

RomaLargest hub · 76 HQs

550Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

959

11-50

530

51-200

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

3,405

31–60

241

61–90

90–180

180+

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 consultancy companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Italy whose own description of what they do matches “renewable energy consultancy companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among renewable energy consultancy companies, and records with no verified work email. Companies headquartered outside Italy are excluded even when they keep an office there.
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 an evidence 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, 3,649 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 5, 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 consultancy companies by metro

Renewable energy consultancy companies in Roma76
Renewable energy consultancy companies in Milan59
Renewable energy consultancy companies in Milano54
Renewable energy consultancy companies in Torino33
Renewable energy consultancy companies in Rome30
Renewable energy consultancy companies in Brescia27

Frequently asked

How many renewable energy consultancy companies are there based in Italy?

RevenueBase identified 1,600 renewable energy consultancy companies headquartered in Italy 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?

NWG S.P.A, headquartered in Prato, tops this list with the largest team on record.

Which city has the most renewable energy consultancy companies?

Roma leads with 76 headquartered companies, followed by Milan (59) and Milano (54).

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 3,649 verified decision-maker contacts tracked across these 1,600 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 5, 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.