Company lists · Data refreshed September 2026

Top 25 Energy efficiency retrofit companies based in Switzerland

Name: Energy efficiency retrofit companies based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 81 companies tracked

RevenueBase identified 81 energy efficiency retrofit companies headquartered in Switzerland as of September 2026 and tracks 504 professional contacts across them, including 224 with verified work emails. Zurich is the largest hub.

This list covers energy efficiency retrofit companies headquartered in Switzerland, 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 16, 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 16, 2026 86% judged on-target in blind review

81Companies

504Contacts tracked

224Verified emails

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The 25 largest energy efficiency retrofit companies based in Switzerland

Ranked by team size

Top 25 of 81 energy efficiency retrofit companies based in Switzerland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficiency retrofit 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	GLB Genossenschaft	Partial evidence	Langnau, SwitzerlandHQ checked Sep 16, 2026	501-1,000	142 contacts →
	Partial evidence “GLB ist die verlässliche Partnerin für Lebensräume – Die Expertin für energieeffiziente Sanierung, Neubau, Einfamilien- oder Mehrfamilienhaus, Gewerbe- oder Industriebau…” Source: RevenueBase Database · checked Sep 16, 2026
2	Energie-Agentur DER Wirtschaft Agence DE L Énergie Pour L Économie	Partial evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	51-200	31 contacts →
	Partial evidence “Seit 2001 bieten wir unseren Teilnehmern unter der Einhaltung von Energieträger- und Produkteneutralität einen Rund-um-Service im Energie-Management mit bewährten und von Behörden…” Source: RevenueBase Database · checked Sep 16, 2026
3	Ecco2 Solutions AG	Strong evidence	Givisiez, SwitzerlandHQ checked Sep 16, 2026	11-50	26 contacts →
	Strong evidence “ECCO2 Solutions AG offers innovative services for energy efficiency in buildings.” Source: RevenueBase Database · checked Sep 16, 2026
4	Enastra AG	Partial evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	11-50	25 contacts →
	Partial evidence “Das Vernetzen der Fachgebiete Strategie & Konzept, Bauherrentreuhand, Energiecontrolling und Nebenkosten ist das Fundament unserer Kernkompetenz.” Source: RevenueBase Database · checked Sep 16, 2026
5	Home Intelligence Sàrl	Indirect evidence	Lonay, SwitzerlandHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect evidence “Spécialiste en optimisation énergétique!” Source: RevenueBase Database · checked Sep 16, 2026
6	P P Project Solutions SA	Indirect evidence	Yverdon, SwitzerlandHQ checked Sep 16, 2026	11-50	12 contacts →
	Indirect evidence “p+p project est votre partenaire pour tout projet industriel innovant.” Source: RevenueBase Database · checked Sep 16, 2026
7	E-Nno Switzerland SA	Indirect evidence	Carouge, SwitzerlandHQ checked Sep 16, 2026	11-50	12 contacts →
	Indirect evidence “E-nno développe et propose des solutions d’optimisation et de suivi énergétique pour les professionnels de l’immobilier et de la construction.” Source: RevenueBase Database · checked Sep 16, 2026
8	DM Energieberatung AG	Partial evidence	Brugg, SwitzerlandHQ checked Sep 16, 2026	11-50	11 contacts →
	Partial evidence “DM Energieberatung AG is a renewables & environment company based out of Paradiesstrasse 5, Brugg, Aargau, Switzerland.” Source: RevenueBase Database · checked Sep 16, 2026
9	YORD	Indirect evidence	Fribourg, SwitzerlandHQ checked Sep 16, 2026	1-10	10 contacts →
	Indirect evidence “Jusqu’à 40% d’économies pour votre chauffage YORD vous accompagne dans la réduction et le monitoring de la consommation énergétique des chauffages pour tous les types de bâtiments.” Source: RevenueBase Database · checked Sep 16, 2026
10	Enerbat SA	Partial evidence	Genève, SwitzerlandHQ checked Sep 16, 2026	1-10	9 contacts →
	Partial evidence “EnerBat assure la gestion énergétique globale du bâtiment.” Source: RevenueBase Database · checked Sep 16, 2026
11	Effin'art Sàrl	Indirect evidence	Biel, SwitzerlandHQ checked Sep 16, 2026	11-50	7 contacts →
	Indirect evidence “Effin'Art Sàrl est active dans le domaine de l'énergétique des bâtiments et l'architecture durable.” Source: RevenueBase Database · checked Sep 16, 2026
12	Energy Efficiency HUB AG	Strong evidence	Zug, SwitzerlandHQ checked Sep 16, 2026	1-10	7 contacts →
	Strong evidence “Energy Efficiency Hub (EEHub) is an independent service and solution provider and trusted adviser to owners and operators of industrial cooling systems, chillers and heat pumps.” Source: RevenueBase Database · checked Sep 16, 2026
13	Weinmann-Energies SA	Partial evidence	Echallens, SwitzerlandHQ checked Sep 16, 2026	51-200	5 contacts →
	Partial evidence “Weinmann-Energies est un bureau d’ingénieurs-conseils EPFL-SIA-USIC.” Source: RevenueBase Database · checked Sep 16, 2026
14	E H Ingenieurbüro FÜR Energie Haustechnik AG	Partial evidence	Schaffhausen, SwitzerlandHQ checked Sep 16, 2026	11-50	4 contacts →
	Partial evidence “Energieeffizienz, erneuerbare Energien und Komfort sind unsere Kernkompetenzen.” Source: RevenueBase Database · checked Sep 16, 2026
15	Energo Energieeffizienz In Gebäuden	Indirect evidence	Hünenberg, SwitzerlandHQ checked Sep 16, 2026	11-50	3 contacts →
	Indirect evidence “Was gut für die Umwelt ist, ist auch gut fürs Portemonnaie“.” Source: RevenueBase Database · checked Sep 16, 2026
16	Abtec SA	Indirect evidence	Lonay, SwitzerlandHQ checked Sep 16, 2026	1-10	3 contacts →
	Indirect evidence “Nos activités d’ingénieurs spécialisés portent sur le conseil et le développement de projets touchant plusieurs domaines relatifs à l’énergie dans le bâtiment.” Source: RevenueBase Database · checked Sep 16, 2026
17	Helvetia Energy	Indirect evidence	Genève, SwitzerlandHQ checked Sep 16, 2026	11-50	3 contacts →
	Indirect evidence “Notre engagement est de vous offrir l'excellence en matière d'analyse et d'optimisation des coûts énergétiques dans le respect du développement durable et responsable.” Source: RevenueBase Database · checked Sep 16, 2026
18	Unyqum	Partial evidence	Novazzano, SwitzerlandHQ checked Sep 16, 2026	1-10	3 contacts →
	Partial evidence “UNYQUM – Architecture & Engineering è uno studio di architettura e ingegneria con sede in Ticino, specializzato in risanamenti energetici, perizie e consulenze tecniche, nonché…” Source: RevenueBase Database · checked Sep 16, 2026
19	Ström SA	Partial evidence	Crissier, SwitzerlandHQ checked Sep 16, 2026	1-10	3 contacts →
	Partial evidence “STRÖM SA offers smart homes and eco energy solutions services for your home and industrial environments.” Source: RevenueBase Database · checked Sep 16, 2026
20	OST Energie	Partial evidence	Sankt Gallen, SwitzerlandHQ checked Sep 16, 2026	1-10	3 contacts →
	Partial evidence “Wir verbessern Ihre Gebäudeleistung und reduzieren Energie- und Betriebskosten, verringern CO2-Emissionen und vereinfachen den Unterhalt Ihrer Immobilie.” Source: RevenueBase Database · checked Sep 16, 2026
21	Ecosolve.Energy LTD	Strong evidence	Landquart, SwitzerlandHQ checked Sep 16, 2026	1-10	3 contacts →
	Strong evidence “At EcoSolve.Energy, we stand for measurable energy efficiency powered by smart IoT technology.” Source: RevenueBase Database · checked Sep 16, 2026
22	Begetec Gmbh	Indirect evidence	Uznach, SwitzerlandHQ checked Sep 16, 2026	1-10	3 contacts →
	Indirect evidence “Wir haben uns darauf spezialisiert, bestehende Gebäude individuell und massgeschneidert auf die Gegebenheiten zu optimieren.” Source: RevenueBase Database · checked Sep 16, 2026
23	Energybat Consulting	Indirect evidence	Estavayer-le-lac, SwitzerlandHQ checked Sep 16, 2026	1-10	3 contacts →
	Indirect evidence “Nous sommes une société partenaire de Soleol SA et faisant partie du même groupe (Greentech Holding SA).” Source: RevenueBase Database · checked Sep 16, 2026
24	Flowex Gmbh	Partial evidence	Diepoldsau, SwitzerlandHQ checked Sep 16, 2026	1-10	2 contacts →
	Partial evidence “Einfache und sichere Energie- und Versorgungssysteme – in Theorie und Praxis - Otpimierung bestehender Versorgungssysteme wie Heizungs- und Kühlkreisläufe für die Industrie-…” Source: RevenueBase Database · checked Sep 16, 2026
25	Protec Elektro AG	Indirect evidence	Horw, SwitzerlandHQ checked Sep 16, 2026	11-50	2 contacts →
	Indirect evidence “Die PROTEC Elektro AG unterstützt Sie bei Neu- und Umbauten von Gewerbe, Industrie- sowie Gebäudeinstallationen.” Source: RevenueBase Database · checked Sep 16, 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: energy efficiency retrofit 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 energy efficiency retrofit companies.
Partial evidence: Its own public description names part of energy efficiency retrofit companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency retrofit 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 81 energy efficiency retrofit companies based in Switzerland

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Energy efficiency retrofit companies based in Switzerland at a glance

As of Sep 16, 2026

44.4%Verified-email coverage

6.2Average contacts per company

1-10Median size (employees)

7.4%Largest-city concentration · Zurich

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured worldwide rather than for Switzerland, so it is reported there. Company counts and contact totals on this page are exact for Switzerland, over 81 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 efficiency retrofit 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 Switzerland whose own description of what they do matches “energy efficiency retrofit 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 energy efficiency retrofit 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 energy efficiency retrofit companies, and records with no verified work email. Companies headquartered outside Switzerland 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, 224 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 16, 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.

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 efficiency retrofit 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 energy efficiency retrofit companies are there based in Switzerland?

RevenueBase identified 81 energy efficiency retrofit companies headquartered in Switzerland 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?

GLB Genossenschaft, headquartered in Langnau, tops this list with the largest team on record.

Which city has the most energy efficiency retrofit companies?

Zurich leads with 6 headquartered companies, followed by Geneve (4) and Fribourg (2).

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 224 verified decision-maker contacts tracked across these 81 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 16, 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.