Company lists · Data refreshed September 2026

Top 25 Cleantech consulting firms based in Italy

Name: Cleantech consulting firms based in Italy
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 442 companies tracked

RevenueBase identified 442 cleantech consulting firms headquartered in Italy as of September 2026 and tracks 2,854 professional contacts across them, including 908 with verified work emails. Roma is the largest hub.

This list covers cleantech consulting firms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

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 21, 2026 86% judged on-target in blind review

442Companies

2,854Contacts tracked

908Verified emails

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The 25 largest cleantech consulting firms based in Italy

Ranked by team size

Top 25 of 442 cleantech consulting firms based in Italy, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cleantech consulting firms: 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	Montana S.P.A	Partial evidence	Milano, ItalyHQ checked Sep 21, 2026	51-200	129 contacts →
	Partial evidence “Engineering, development and consulting services for waste management, remediation, renewable energy, industrial and technological plants, natural resources, urban & land…” Source: RevenueBase Database · checked Sep 21, 2026
2	Greenergy	Indirect evidence	Castellaneta, ItalyHQ checked Sep 21, 2026	51-200	99 contacts →
	Indirect evidence “Non siamo tecnici, ma progettisti consapevoli di essere parte del cambiamento.” Source: RevenueBase Database · checked Sep 21, 2026
3	KEY To Energy	Partial evidence	Roma, ItalyHQ checked Sep 21, 2026	51-200	94 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 21, 2026
4	Energy Italy	Indirect evidence	Costermano Sul Garda, ItalyHQ checked Sep 21, 2026	11-50	59 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
5	Green Horse Advisory	Indirect evidence	Milan, ItalyHQ checked Sep 21, 2026	11-50	45 contacts →
	Indirect evidence “Green Horse, acronym for GREEN HORizon for a Sustainable Economy, is an advisory project dedicated exclusively to the energy transition industry with particular attention to…” Source: RevenueBase Database · checked Sep 21, 2026
6	Samso SPA	Indirect evidence	Milano, ItalyHQ checked Sep 21, 2026	11-50	42 contacts →
	Indirect evidence “OGNI GIORNO AIUTIAMO LE AZIENDE A DIVENTARE PIÙ EFFICIENTI, A RIDURRE I CONSUMI, A GENERARE AUTONOMAMENTE L’ENERGIA PULITA IN GRADO DI SODDISFARE IL PROPRIO FABBISOGNO.” Il nostro…” Source: RevenueBase Database · checked Sep 21, 2026
7	Eureka S.R.L	Indirect evidence	Trento, ItalyHQ checked Sep 21, 2026	51-200	41 contacts →
	Indirect evidence “Da oltre un decennio, ci impegniamo nel settore delle energie rinnovabili con una visione chiara incentrata sulla sostenibilità, l'efficienza energetica e la fornitura di servizi…” Source: RevenueBase Database · checked Sep 21, 2026
8	Fichtner Italia	Indirect evidence	Genova, ItalyHQ checked Sep 21, 2026	11-50	38 contacts →
	Indirect evidence “Fichtner Italia è una società indipendente, appartenente al Gruppo Fichtner, attiva sin dalla data di fondazione nel fornire servizi di consulenza di ingegneria a gruppi…” Source: RevenueBase Database · checked Sep 21, 2026
9	ESE Engineering Services For Energy S.R.L	Partial evidence	Milano, ItalyHQ checked Sep 21, 2026	11-50	31 contacts →
	Partial evidence “We serve the global energy community from Corso Magenta, at the beating heart of Milan: consulting, engineering, inventing, looking into every corner of the power generation…” Source: RevenueBase Database · checked Sep 21, 2026
10	SGI Studio Galli Ingegneria S.R.L	Indirect evidence	Rubano, ItalyHQ checked Sep 21, 2026	11-50	29 contacts →
	Indirect evidence “SGI is an Italian leading consultancy firm specialized in water, environmental and civil engineering.” Source: RevenueBase Database · checked Sep 21, 2026
11	Exalto Energy & Innovation	Indirect evidence	Palermo, ItalyHQ checked Sep 21, 2026	11-50	28 contacts →
	Indirect evidence “Exalto è una società che opera nei settori della consulenza strategica alle imprese e alle istituzioni, della ricerca, dell'efficienza energetica nell’industria e nel terziario…” Source: RevenueBase Database · checked Sep 21, 2026
12	Energysave	Indirect evidence	Cesano Maderno, ItalyHQ checked Sep 21, 2026	11-50	28 contacts →
	Indirect evidence “ENERGYSAVE PROGETTAZIONI E CONSULENZE S.R.L.” Source: RevenueBase Database · checked Sep 21, 2026
13	SOL Lucet	Indirect evidence	Sorbano Del Giudice Lucca, ItalyHQ checked Sep 21, 2026	11-50	27 contacts →
	Indirect evidence “Ci occupiamo di offrire i migliori servizi in ambito di innovazione ed efficientamento energetico.” Source: RevenueBase Database · checked Sep 21, 2026
14	Studio Santi	Partial evidence	Santa Marinella, ItalyHQ checked Sep 21, 2026	11-50	27 contacts →
	Partial evidence “Studio Santi is an independent consulting engineering and management firm specializing in the energy sector, with a strong focus on innovation.” Source: RevenueBase Database · checked Sep 21, 2026
15	Studio Rinnovabili	Indirect evidence	Roma, ItalyHQ checked Sep 21, 2026	11-50	25 contacts →
	Indirect evidence “Studio Rinnovabili since 2004 works to meet the needs of those who want to develop renewable energy and energy efficiency projects by supporting with engineering and analysis.” Source: RevenueBase Database · checked Sep 21, 2026
16	Ness S.P.A. SB	Indirect evidence	Roma, ItalyHQ checked Sep 21, 2026	11-50	24 contacts →
	Indirect evidence “NESS è una ESCo certificata UNI 11352 che si pone come obiettivo quello di fornire, a clienti pubblici e privati, soluzioni ai problemi di natura energetica ed ambientale.” Source: RevenueBase Database · checked Sep 21, 2026
17	Mott Macdonald Italy	Indirect evidence	Genova, ItalyHQ checked Sep 21, 2026	n/a	22 contacts →
	Indirect evidence “Mott MacDonald Italy è la filiale italiana di Mott MacDonald Limited, società globale di consulenza gestionale, ingegneristica e di sviluppo al vertice del settore energia.” Source: RevenueBase Database · checked Sep 21, 2026
18	Energika SRL	Indirect evidence	Rimini, ItalyHQ checked Sep 21, 2026	11-50	22 contacts →
	Indirect evidence “Massimizziamo l’efficienza, ottimizziamo i costi, riduciamo l’impatto Dal 1997 aiutiamo le aziende a gestire l’energia in modo più efficiente, riducendo costi e sprechi con…” Source: RevenueBase Database · checked Sep 21, 2026
19	ALI Energy Advisor	Indirect evidence	Portogruaro, ItalyHQ checked Sep 21, 2026	11-50	22 contacts →
	Indirect evidence “Non siamo un fornitore di energia e gas.” Source: RevenueBase Database · checked Sep 21, 2026
20	Eta-Florence Renewable Energies	Indirect evidence	Florence, ItalyHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “Engage ETA Florence Renewable Energies to optimise the success of your green project.” Source: RevenueBase Database · checked Sep 21, 2026
21	3e Studio SRL	Indirect evidence	Castelfranco Veneto, ItalyHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “3E STUDIO nasce nel 2015, come società di consulenza e servizi inerenti l’efficienza energetica e agli incentivi le fonti rinnovabili.” Source: RevenueBase Database · checked Sep 21, 2026
22	Baboo Energy Service Company	Indirect evidence	Omegna, ItalyHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “DAL 2009 OLTRE 70 CLIENTI HANNO TROVATO IL TESORO NELL'ENERGIA.” Source: RevenueBase Database · checked Sep 21, 2026
23	Entec SPA	Indirect evidence	Savigliano, ItalyHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence “Entec nasce all’inizio del 2007 con una missione specifica: progettare e realizzare impianti di produzione di energia utilizzando le nuove tecnologie che consentono lo…” Source: RevenueBase Database · checked Sep 21, 2026
24	Inwega	Indirect evidence	Merate, ItalyHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence “Siamo il consulente energetico che stai cercando.” Source: RevenueBase Database · checked Sep 21, 2026
25	Reia S.R.L	Indirect evidence	Casalecchio Di Reno, ItalyHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 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: cleantech consulting firms. 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 cleantech consulting firms.
Partial evidence: Its own public description names part of cleantech consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cleantech consulting firms. 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 442 cleantech consulting firms based in Italy

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Cleantech consulting firms based in Italy at a glance

As of Sep 21, 2026

31.8%Verified-email coverage

6.5Average contacts per company

1-10Median size (employees)

5.7%Largest-city concentration · Roma

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

302

11-50

124

51-200

201-500

501-1,000

10001+

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 442 companies.

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 cleantech consulting firms, 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.
What qualifies: Companies headquartered in Italy whose own description of what they do matches “cleantech consulting firms”. 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 cleantech consulting firms), 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 cleantech consulting firms, 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 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, 908 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 21, 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.

Cleantech consulting firms by metro

Cleantech consulting firms in Roma25

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 cleantech consulting firms, 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 cleantech consulting firms are there based in Italy?

RevenueBase identified 442 cleantech consulting firms 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?

Montana S.P.A, headquartered in Milano Mi, tops this list with the largest team on record.

Which city has the most cleantech consulting firms?

Roma leads with 25 headquartered companies, followed by Milan (21) and Milano (21).

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 908 verified decision-maker contacts tracked across these 442 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 21, 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.