Company lists · Data refreshed September 2026
Top 25 Energy and sustainability consultants based in Italy
RevenueBase identified 1,610 energy and sustainability consultants headquartered in Italy as of September 2026 and tracks 13,238 professional contacts across them, including 4,786 with verified work emails. Roma is the largest hub.
This list covers energy and sustainability consultants 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.
The 25 largest energy and sustainability consultants based in Italy
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 655 contacts → | ||||
Indirect evidence “Enegan offre soluzioni personalizzate per le aziende abbinando alla fornitura di elettricità, gas e telecomunicazioni una vasta gamma di prodotti e servizi ad alto valore…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 608 contacts → | ||||
Indirect evidence “Da dicembre 2025, abbiamo integrato EF Solare, il primo produttore fotovoltaico italiano.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 423 contacts → | ||||
Strong evidence “We are an Energy Digital and Sustainable Company specialized in sustainability consulting services and 4.0 solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 396 contacts → | ||||
Indirect evidence “SEINGIM began its activities more than 30 years ago in Venice.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 241 contacts → | ||||
Partial evidence “Power Reply is the Reply group company focused on the Energy & Utilities market.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 215 contacts → | ||||
Strong evidence “We are a multidisciplinary engineering consultancy driven by integral sustainability.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 184 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 171 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 140 contacts → | ||||
Indirect evidence “DEERNS è una società di consulenza internazionale in grado di fornire servizi di ingegneria per l’ambiente costruito con un approccio integrato e completo.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 140 contacts → | ||||
Strong evidence “A national player in energy efficiency and sustainability: Geoside is the Energy Service Company (ESCo) of Italgas Group and a leader in Italy and Europe in the field of energy…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 136 contacts → | ||||
Indirect evidence “IGEAM opera dal 1979 nel settore della consulenza e dell’ingegneria per lo sviluppo sostenibile.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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, 2026Thanks. The Data Team will review it. | |||||
| 13 | 106 contacts → | ||||
Partial evidence “IERI da 125 anni operiamo in FVG nel campo delle energie; da impresa familiare a impresa a forte connotazione manageriale, salvaguardando quel rapporto viscerale con il nostro…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 99 contacts → | ||||
Indirect evidence “Non siamo tecnici, ma progettisti consapevoli di essere parte del cambiamento.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 95 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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, 2026Thanks. The Data Team will review it. | |||||
| 17 | 83 contacts → | ||||
Partial evidence “Energy Team è l’operatore italiano leader nel monitoraggio, controllo e gestione del consumo energetico.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 81 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 80 contacts → | ||||
Partial evidence “è una società che opera nel settore energetico.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 79 contacts → | ||||
Indirect evidence “Siamo al tuo fianco per intraprendere un percorso di sostenibilità.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 78 contacts → | ||||
Partial evidence “servizi di progettazione integrata, risparmio energetico, analisi energetiche finalizzate all'energy saving impianti termici impianti elettrici energie alternative.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 68 contacts → | ||||
Indirect evidence “Greenwich è tra le realtà più affermate in Italia nel settore delle consulenze in sostenibilità e innovazione.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 67 contacts → | ||||
Partial evidence “For nearly three decades Tecnoconsult has been a leading up-stream designer in the energy sector, utilizing its proven expertise and vast experience to meet the major energy…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 64 contacts → | ||||
Indirect evidence “Ambiente Italia is a research and consulting institute working in environmental and territorial planning and analysis.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 63 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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: energy and sustainability consultants. 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 energy and sustainability consultants.
- Partial evidence
- Its own public description names part of energy and sustainability consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name energy and sustainability consultants. 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 1,610 energy and sustainability consultants based in Italy
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Energy and sustainability consultants based in Italy at a glance
As of Sep 21, 2026Companies by employee count
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 1,610 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 energy and sustainability consultants, 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 “energy and sustainability consultants”. 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 energy and sustainability consultants), 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 energy and sustainability consultants, 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, 4,786 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.
Energy and sustainability consultants by metro
- Energy and sustainability consultants in Roma73
- Energy and sustainability consultants in Milan66
- Energy and sustainability consultants in Milano64
- Energy and sustainability consultants in Rome42
- Energy and sustainability consultants in Torino42
- Energy and sustainability consultants in Milano Mi30
- Energy and sustainability consultants in Brescia29
- Energy and sustainability consultants in Napoli29
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 energy and sustainability consultants, 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 energy and sustainability consultants are there based in Italy?
RevenueBase identified 1,610 energy and sustainability consultants 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?
Enegan, headquartered in Vinci, tops this list with the largest team on record.
Which city has the most energy and sustainability consultants?
Roma leads with 73 headquartered companies, followed by Milan (66) and Milano (64).
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 4,786 verified decision-maker contacts tracked across these 1,610 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.
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