Company lists · Data refreshed September 2026

Top 25 Retrofit contractors based in Switzerland

Name: Retrofit contractors based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 123 companies tracked

RevenueBase identified 123 retrofit contractors headquartered in Switzerland as of September 2026 and tracks 786 professional contacts across them, including 330 with verified work emails. Geneve is the largest hub.

This list covers retrofit contractors 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 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

123Companies

786Contacts tracked

330Verified emails

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The 25 largest retrofit contractors based in Switzerland

Ranked by team size

Top 25 of 123 retrofit contractors based in Switzerland, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to retrofit contractors: 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	Indirect evidence	Langnau, SwitzerlandHQ checked Sep 17, 2026	501-1,000	142 contacts →
	Indirect 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 17, 2026
2	Tech Building	Indirect evidence	Perly - Genève, SwitzerlandHQ checked Sep 17, 2026	51-200	82 contacts →
	Indirect evidence “Acteur de référence depuis plus de 25 ans à Genève, TECH BUILDING est une entreprise dont le cœur de métier repose sur la réalisation d’infrastructures énergétiques du bâtiment et…” Source: RevenueBase Database · checked Sep 17, 2026
3	Roth Gruppe AG	Indirect evidence	4563, SwitzerlandHQ checked Sep 17, 2026	201-500	52 contacts →
	Indirect evidence “ROTH GRUPPE – Isolationen.” Source: RevenueBase Database · checked Sep 17, 2026
4	Services Plus Energies SA	Indirect evidence	Bernex, SwitzerlandHQ checked Sep 17, 2026	51-200	31 contacts →
	Indirect evidence “Depuis 15 ans à votre service, Services Plus Energies est une entreprise spécialisée en Chauffage, Ventilation et Climatisation.” Source: RevenueBase Database · checked Sep 17, 2026
5	Muller Energies	Indirect evidence	Meinier, SwitzerlandHQ checked Sep 17, 2026	51-200	26 contacts →
	Indirect evidence “Muller Energies SA est votre spécialiste dans la maintenance et l’optimisation énergétique de vos installations de chauffage, ventilation, et climatisation.” Source: RevenueBase Database · checked Sep 17, 2026
6	Coutaz SA	Indirect evidence	St-maurice, SwitzerlandHQ checked Sep 17, 2026	51-200	23 contacts →
	Indirect evidence “Fondée en 1946 à St-Maurice, Coutaz SA est une entreprise pionnière dans les techniques du bâtiment.” Source: RevenueBase Database · checked Sep 17, 2026
7	Guggisberg Dach Fassade Energie	Indirect evidence	Wabern, SwitzerlandHQ checked Sep 17, 2026	51-200	21 contacts →
	Indirect evidence “Guggisberg ist der Berner Spezialist für Gebäudehülle und energetische Sanierungen.” Source: RevenueBase Database · checked Sep 17, 2026
8	SB Technique SA	Indirect evidence	Genève, SwitzerlandHQ checked Sep 17, 2026	11-50	18 contacts →
	Indirect evidence “SB technique est un bureau d'Ingénieur Conseil en chauffage, ventilation, climatisation et sécurité du bâtiment développant des concepts énergétiques ambitieux pour des…” Source: RevenueBase Database · checked Sep 17, 2026
9	Guggisberg Kurz AG	Indirect evidence	Ostermundigen, SwitzerlandHQ checked Sep 17, 2026	51-200	18 contacts →
	Indirect evidence “Mit über 90 erfahrene Mitarbeitenden ist die Guggisberg Kurz AG in der Lage sowohl grosse Objekte auszuführen, als auch sehr flexibel zu agieren.” Source: RevenueBase Database · checked Sep 17, 2026
10	PIC Energies SA	Indirect evidence	Genève, SwitzerlandHQ checked Sep 17, 2026	11-50	15 contacts →
	Indirect evidence “Le bureau est actif dans les domaines de l’énergétique des bâtiments, du chauffage, de la ventilation, de la climatisation et du sanitaire.” Source: RevenueBase Database · checked Sep 17, 2026
11	Home Intelligence Sàrl	Indirect evidence	Lonay, SwitzerlandHQ checked Sep 17, 2026	11-50	14 contacts →
	Indirect evidence “Spécialiste en optimisation énergétique!” Source: RevenueBase Database · checked Sep 17, 2026
12	Schmid Amrhein AG	Indirect evidence	Luzern, SwitzerlandHQ checked Sep 17, 2026	51-200	13 contacts →
	Indirect evidence “Unsere Wurzeln reichen zurück bis ins Jahr 1947 – doch unser Blick ist klar auf die Zukunft gerichtet.” Source: RevenueBase Database · checked Sep 17, 2026
13	M-Entreprise Générale	Indirect evidence	Collombey, SwitzerlandHQ checked Sep 17, 2026	11-50	12 contacts →
	Indirect evidence “20 ans \|+ appartements rénovés M-Entreprise Générale excelle dans la rénovation en milieu habité, visant à valoriser chaque immeuble avec des solutions clés en main.” Source: RevenueBase Database · checked Sep 17, 2026
14	Elektro 24 AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “Egal ob Neubau, Umbau oder Sanierung: Wir sorgen für Strom an den richtigen Stellen.” Source: RevenueBase Database · checked Sep 17, 2026
15	Neukom Marzolo AG	Indirect evidence	Rafz, SwitzerlandHQ checked Sep 17, 2026	11-50	10 contacts →
	Indirect evidence “Die Neukom Marzolo AG mit Sitz in Rafz und Uster ist Ihr kompetenter Partner für innovative, ökonomische und ökologische Lösungen in der Gebäudetechnik.” Source: RevenueBase Database · checked Sep 17, 2026
16	ADR	Indirect evidence	Fontaines, SwitzerlandHQ checked Sep 17, 2026	51-200	8 contacts →
	Indirect evidence “ADR vous propose un panel de services complémentaires afin de répondre de manière intégrale, fiable et efficiente aux besoins de la clientèle.” Source: RevenueBase Database · checked Sep 17, 2026
17	Elfero AG	Indirect evidence	Meisterschwanden, SwitzerlandHQ checked Sep 17, 2026	11-50	7 contacts →
	Indirect evidence “elfero AG is a renewables & environment company based out of Lindenmattstrasse 9, Meisterschwanden, Canton of Aargau, Switzerland.” Source: RevenueBase Database · checked Sep 17, 2026
18	Effin'art Sàrl	Indirect evidence	Biel, SwitzerlandHQ checked Sep 17, 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 17, 2026
19	Valcalorie SA	Indirect evidence	Sion, SwitzerlandHQ checked Sep 17, 2026	1-10	7 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
20	Haustechnik	Indirect evidence	Staas, SwitzerlandHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “Wir sind ein dynamisches Unternehmen, das sich auf die Bereitstellung erstklassiger Haustechniklösungen spezialisiert hat.” Source: RevenueBase Database · checked Sep 17, 2026
21	Energy Group AG	Indirect evidence	Rotkreuz, SwitzerlandHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “Auf dem Weg zur Nachhaltigkeit: Unsere Sustainable Building Solutions sichern Wirtschaftlichkeit und CO2-Neutralität- Dekarbonisierung - Energetische Areal- und…” Source: RevenueBase Database · checked Sep 17, 2026
22	Ponzio Engineering SA	Indirect evidence	Thierrens, SwitzerlandHQ checked Sep 17, 2026	1-10	6 contacts →
	Indirect evidence “Ponzio Engineering est une entreprise familiale créée en 1970.” Source: RevenueBase Database · checked Sep 17, 2026
23	Ecoenergy Swiss AG	Indirect evidence	Volketswil, SwitzerlandHQ checked Sep 17, 2026	1-10	6 contacts →
	Indirect evidence “Ob Sie nun auf erneuerbare Energien umsteigen, Ihre Öl- oder Gasheizung durch eine moderne, energieeffiziente Anlage ersetzen oder den Wirkungsgrad Ihrer bestehenden Heizung…” Source: RevenueBase Database · checked Sep 17, 2026
24	Servicetech Gmbh	Indirect evidence	Röthenbach, SwitzerlandHQ checked Sep 17, 2026	1-10	5 contacts →
	Indirect evidence “Die ServiceTech GmbH ist ein Fachunternehmen für Haustechnik und Energielösungen mit Sitz in Röthenbach bei Herzogenbuchsee.” Source: RevenueBase Database · checked Sep 17, 2026
25	URS Haller AG	Indirect evidence	Aesch, SwitzerlandHQ checked Sep 17, 2026	11-50	4 contacts →
	Indirect evidence “Ihre Fassade oder ihr Wohnraum ist in die Jahre gekommen, Ihre Wände sind kalt und haben Risse oder es fehlt ein Zimmer durch ein neues Lebensereignis.” 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: retrofit contractors. 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 retrofit contractors.
Partial evidence: Its own public description names part of retrofit contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name retrofit contractors. 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 123 retrofit contractors based in Switzerland

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Retrofit contractors based in Switzerland at a glance

As of Sep 17, 2026

42.0%Verified-email coverage

6.4Average contacts per company

1-10Median size (employees)

4.9%Largest-city concentration · Geneve

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 123 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 retrofit contractors, 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 “retrofit contractors”. 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 retrofit contractors), 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 retrofit contractors, 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, 330 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.

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 retrofit contractors, 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 retrofit contractors are there based in Switzerland?

RevenueBase identified 123 retrofit contractors 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 retrofit contractors?

Geneve leads with 6 headquartered companies, followed by Zurich (5) and Neuchatel (3).

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 330 verified decision-maker contacts tracked across these 123 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.