Company lists · Data refreshed September 2026

Top 25 Residential energy efficiency companies based in Italy

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 715 companies tracked

RevenueBase identified 715 residential energy efficiency companies headquartered in Italy as of September 2026 and tracks 5,638 professional contacts across them, including 1,633 with verified work emails. Roma is the largest hub.

This list covers residential energy efficiency 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 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 17, 2026 86% judged on-target in blind review

715Companies

5,638Contacts tracked

1,633Verified emails

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The 25 largest residential energy efficiency companies based in Italy

Ranked by team size

Top 25 of 715 residential energy efficiency companies based in Italy, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to residential energy efficiency 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	Sorgenia	Indirect evidence	Milan, ItalyHQ checked Sep 17, 2026	201-500	608 contacts →
	Indirect evidence “Da dicembre 2025, abbiamo integrato EF Solare, il primo produttore fotovoltaico italiano.” Source: RevenueBase Database · checked Sep 17, 2026
2	Unoenergy SPA	Strong evidence	Milano, ItalyHQ checked Sep 17, 2026	501-1,000	377 contacts →
	Strong evidence “Il Gruppo Unoenergy da oltre 20 anni è uno dei primi operatori - a capitale interamente privato - per la fornitura di gas naturale, energia elettrica e servizi di efficientamento…” Source: RevenueBase Database · checked Sep 17, 2026
3	Geoside	Strong evidence	Casalecchio Di Reno, ItalyHQ checked Sep 17, 2026	51-200	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 17, 2026
4	PEF SPA	Partial evidence	Barberino Tavarnelle, ItalyHQ checked Sep 17, 2026	11-50	93 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 17, 2026
5	Teicosgroup	Indirect evidence	Milano, ItalyHQ checked Sep 17, 2026	51-200	87 contacts →
	Indirect evidence “Our organization has a special attitude with the application of innovative solutions and procedures with a value-based approach in building process and in site management.” Source: RevenueBase Database · checked Sep 17, 2026
6	A3sprogetti	Partial evidence	Pescara, ItalyHQ checked Sep 17, 2026	11-50	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 17, 2026
7	TERMO	Indirect evidence	Milano, ItalyHQ checked Sep 17, 2026	51-200	74 contacts →
	Indirect evidence “Italy’s #1 platform for sustainable home solutions - We partner with financial institutions, sustainable home improvement professionals and manufacturers to make sustainable home…” Source: RevenueBase Database · checked Sep 17, 2026
8	Energy Italy	Partial evidence	Costermano Sul Garda, ItalyHQ checked Sep 17, 2026	11-50	59 contacts →
	Partial 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 17, 2026
9	Braga Group	Partial evidence	Agrate Brianza, ItalyHQ checked Sep 17, 2026	51-200	47 contacts →
	Partial evidence “Braga Group: il tuo partner per la transizione energetica.” Source: RevenueBase Database · checked Sep 17, 2026
10	Gaia Energy Systems	Strong evidence	Gricignano Di Aversa, ItalyHQ checked Sep 17, 2026	11-50	43 contacts →
	Strong evidence “Gaia Energy Systems opera da anni nei settori delle energie rinnovabili e dell’efficientamento energetico, sia al fianco di aziende che di privati.” Source: RevenueBase Database · checked Sep 17, 2026
11	Samso SPA	Strong evidence	Milano, ItalyHQ checked Sep 17, 2026	11-50	42 contacts →
	Strong 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 17, 2026
12	Agenzia PER L'energia E LO Sviluppo Sostenibile	Partial evidence	Modena, ItalyHQ checked Sep 17, 2026	11-50	38 contacts →
	Partial evidence “La mission di AESS è fornire servizi a imprese, operatori economici e sociali, enti pubblici e di diritto privato e altre associazioni relativi a: – miglioramento dell’efficienza…” Source: RevenueBase Database · checked Sep 17, 2026
13	Solarplay	Partial evidence	Lissone, ItalyHQ checked Sep 17, 2026	51-200	35 contacts →
	Partial evidence “Diffondere la cultura dell’autonomia energetica in Italia e nel mondo, rendendo le tecnologie sempre più accessibili a tutti, per case e aziende sempre più ecosostenibili è la…” Source: RevenueBase Database · checked Sep 17, 2026
14	Cogenio	Strong evidence	Roma, ItalyHQ checked Sep 17, 2026	n/a	31 contacts →
	Strong evidence “Cogenio is an energy-efficiency service platform set up to help businesses cut their energy costs and CO2 emissions, by providing them with solutions designed to improve their…” Source: RevenueBase Database · checked Sep 17, 2026
15	Enesco SRL	Partial evidence	Treglio, ItalyHQ checked Sep 17, 2026	11-50	29 contacts →
	Partial evidence “Siamo una Energy Service Company costituita da professionisti attivi nel settore delle energie rinnovabili dal 1998, nata per offrire servizi integrati finalizzati alla produzione…” Source: RevenueBase Database · checked Sep 17, 2026
16	Kennew SRL	Partial evidence	Nembro, ItalyHQ checked Sep 17, 2026	51-200	29 contacts →
	Partial evidence “Dal 2008 aiutiamo persone e imprese a risparmiare energia e a vivere in modo più sostenibile.” Source: RevenueBase Database · checked Sep 17, 2026
17	Lemon Sistemi S.P.A	Indirect evidence	Balestrate, ItalyHQ checked Sep 17, 2026	51-200	29 contacts →
	Indirect evidence “Lemon Sistemi è un'azienda giovane, dinamica e veloce.” Source: RevenueBase Database · checked Sep 17, 2026
18	Enertech Solution	Strong evidence	Milano, ItalyHQ checked Sep 17, 2026	11-50	28 contacts →
	Strong evidence “Siamo un’innovativa società di ingegneria specializzata nel settore dell’energia e dell’efficienza energetica.” Source: RevenueBase Database · checked Sep 17, 2026
19	IES Solare S.R.L	Strong evidence	Livorno, ItalyHQ checked Sep 17, 2026	51-200	28 contacts →
	Strong evidence “Ies Solare srl vanta 20 anni di esperienza nel campo delle energie rinnovabili e risparmio energetico, proponendo soluzioni innovative e tecnologiche per l’efficientamento…” Source: RevenueBase Database · checked Sep 17, 2026
20	Wölmann	Partial evidence	Lissone, ItalyHQ checked Sep 17, 2026	51-200	28 contacts →
	Partial evidence “In Wölmann crediamo che ci sia un modo più conveniente e pulito per avere energia elettrica in casa o in azienda.” Source: RevenueBase Database · checked Sep 17, 2026
21	Energy Saving SPA	Partial evidence	Monza, ItalyHQ checked Sep 17, 2026	11-50	26 contacts →
	Partial evidence “Saving Energy Spa is a well know independent energy consultancy company” Source: RevenueBase Database · checked Sep 17, 2026
22	Arcoservizi S.P.A	Partial evidence	Torino, ItalyHQ checked Sep 17, 2026	51-200	26 contacts →
	Partial evidence “Siamo uno dei principali competitor nel mercato dei servizi energetici, con una forte attitudine all’innovazione tecnologica, alla riqualificazione dei servizi, al risparmio…” Source: RevenueBase Database · checked Sep 17, 2026
23	Astea Energia	Indirect evidence	Osimo, ItalyHQ checked Sep 17, 2026	51-200	26 contacts →
	Indirect evidence “Non solo Luce e Gas.” Source: RevenueBase Database · checked Sep 17, 2026
24	BE ONE S.P.A	Partial evidence	Lucca, ItalyHQ checked Sep 17, 2026	11-50	26 contacts →
	Partial evidence “BE ONE PROIETTA IN AVANTI IL CONCETTO DI ENERGIA, OFFRENDOTI UN SERVIZIO CHE UNISCE TECNOLOGIA, RAPPORTO DIRETTO COL CLIENTE ED ESPERIENZA PLURIENNALE NEL SETTORE.” Source: RevenueBase Database · checked Sep 17, 2026
25	Progettozero	Partial evidence	Bologna, ItalyHQ checked Sep 17, 2026	11-50	25 contacts →
	Partial evidence “Gruppo Energetica nasce nel 2018 dall’esperienza e dalla volontà di un gruppo di professionisti, che già da diversi anni lavorano nel settore, di far comprendere tutti i benefici…” 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: residential energy efficiency 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 residential energy efficiency companies.
Partial evidence: Its own public description names part of residential energy efficiency companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name residential energy efficiency 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 715 residential energy efficiency companies based in Italy

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Residential energy efficiency companies based in Italy at a glance

As of Sep 17, 2026

29.0%Verified-email coverage

7.9Average contacts per company

1-10Median size (employees)

4.2%Largest-city concentration · Roma

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

401

11-50

254

51-200

201-500

501-1,000

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 715 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 residential energy efficiency 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.
What qualifies: Companies headquartered in Italy whose own description of what they do matches “residential energy efficiency 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 residential energy efficiency 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 residential energy efficiency 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 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, 1,633 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.

Residential energy efficiency companies by metro

Residential energy efficiency companies in Roma30

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 residential energy efficiency 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 residential energy efficiency companies are there based in Italy?

RevenueBase identified 715 residential energy efficiency 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?

Sorgenia, headquartered in Milano, tops this list with the largest team on record.

Which city has the most residential energy efficiency companies?

Roma leads with 30 headquartered companies, followed by Milano (24) and Torino (19).

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 1,633 verified decision-maker contacts tracked across these 715 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.