Company lists · Data refreshed September 2026

Top 25 Geothermal heating installation companies based in Switzerland

Name: Geothermal heating installation companies based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 177 companies tracked

RevenueBase identified 177 geothermal heating installation companies headquartered in Switzerland as of September 2026 and tracks 749 professional contacts across them, including 204 with verified work emails. Geneve is the largest hub.

This list covers geothermal heating installation 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 19, 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 19, 2026 86% judged on-target in blind review

177Companies

749Contacts tracked

204Verified emails

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The 25 largest geothermal heating installation companies based in Switzerland

Ranked by team size

Top 25 of 177 geothermal heating installation companies based in Switzerland, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal heating installation 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	Domotec AG	Indirect evidence	Aarburg, SwitzerlandHQ checked Sep 19, 2026	51-200	46 contacts →
	Indirect evidence “DOMOTEC AG ist seit 1976 als innovatives Unternehmen im Bereich «Haustechnik» tätig.” Source: RevenueBase Database · checked Sep 19, 2026
2	Brauchli SA	Partial evidence	Forel (lavaux), SwitzerlandHQ checked Sep 19, 2026	51-200	41 contacts →
	Partial evidence “Brauchli SA est une société du groupe HOLDIGAZ spécialisée dans les installations de chauffage et de production de froid dans l'industrie, les services et l'habitation, active sur…” Source: RevenueBase Database · checked Sep 19, 2026
3	Thermex SA	Indirect evidence	Eclépens, SwitzerlandHQ checked Sep 19, 2026	51-200	22 contacts →
	Indirect evidence “La Société Thermex est dirigée par Nicolas Faivre qui a repris l’entreprise à 100% en 2007 et depuis 2019 un nouvel actionnaire s’est associé avec Nicolas Faivre, le Groupe…” Source: RevenueBase Database · checked Sep 19, 2026
4	Jenni Energietechnik AG	Indirect evidence	Oberburg, SwitzerlandHQ checked Sep 19, 2026	51-200	19 contacts →
	Indirect evidence “Die Speicherlösung für Ihr Projekt Jenni Energietechnik ist Ihr Partner für Energiespeicher: Ob Industrieanlage, Fernwärmeverbund oder Einfamilienhaus – mit unseren Wärme- und…” Source: RevenueBase Database · checked Sep 19, 2026
5	Lehmann 2000	Indirect evidence	Zofingen, SwitzerlandHQ checked Sep 19, 2026	51-200	19 contacts →
	Indirect evidence “Unser Service für Dich: Planung und Ausführung von Heizungs- und Industriekälteanlagen Heizung und Fernwärme Jetzt online Preise vergleichen und Offerte erhalten…” Source: RevenueBase Database · checked Sep 19, 2026
6	Heizungsmacher AG	Partial evidence	Basel, SwitzerlandHQ checked Sep 19, 2026	11-50	17 contacts →
	Partial evidence “Heizungsmacher AG, ist ein Schweizer Unternehmen, das sich auf den Ersatz alter Heizungen durch moderne Wärmepumpen sowie die Planung und Installation von Photovoltaikanlagen, im…” Source: RevenueBase Database · checked Sep 19, 2026
7	AFM SA	Partial evidence	Bardonnex, SwitzerlandHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “AFM SA – Votre expert en confort et énergie durable depuis plus de 20 ans Basée à Genève, AFM SA est une entreprise suisse spécialisée dans l’installation, le dépannage et la…” Source: RevenueBase Database · checked Sep 19, 2026
8	Geo-Energie Suisse	Partial evidence	Zurich, SwitzerlandHQ checked Sep 19, 2026	11-50	13 contacts →
	Partial evidence “Geo-Energie Suisse AG is Switzerland’s center of excellence for deep geothermal energy.” Source: RevenueBase Database · checked Sep 19, 2026
9	Wärmebau AG	Partial evidence	Weiningen, SwitzerlandHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “Sie erhalten alles aus einer Hand: von der individuellen Beratung über die fachgerechte Planung, Installation und Reparatur bis zum aufmerksamen Kundendienst.” Source: RevenueBase Database · checked Sep 19, 2026
10	Enerdrape	Partial evidence	Ecublens, SwitzerlandHQ checked Sep 19, 2026	11-50	9 contacts →
	Partial evidence “Enerdrape operates the world's first prefabricated geothermal panel technology.” Source: RevenueBase Database · checked Sep 19, 2026
11	Beosolar Gmbh	Indirect evidence	Adelboden, SwitzerlandHQ checked Sep 19, 2026	51-200	9 contacts →
	Indirect evidence “Erneuerbare Energie, Heizung, Sanitärtechnik, Badsanierung, Dach- und Kaminbau, Zimmeröfen, Rohr- und Fernwärmeleitungsbau.” Source: RevenueBase Database · checked Sep 19, 2026
12	Faivre Energie SA	Indirect evidence	Delémont, SwitzerlandHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
13	MHG Heiztechnik Schweiz Gmbh	Indirect evidence	Ebnat-kappel, SwitzerlandHQ checked Sep 19, 2026	11-50	8 contacts →
	Indirect evidence “Ursprünglich als MAN Heiztechnik GmbH bekannt geworden, ist das Unternehmen heute unabhängiger Hersteller von hochwertigen Heizsystemen.” Source: RevenueBase Database · checked Sep 19, 2026
14	Allsol Gmbh	Partial evidence	Reinach, SwitzerlandHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “Conception, planning and realisation of- Photovoltaic systems - Solar thermal systems for water heating and backup heating- Wood pellet heating systems - Heat pumps” Source: RevenueBase Database · checked Sep 19, 2026
15	E3 HLK AG	Indirect evidence	Kriens, SwitzerlandHQ checked Sep 19, 2026	51-200	7 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
16	Eichholzer Haustechnik	Indirect evidence	Oberwil-lieli, SwitzerlandHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “In Sachen Heizungen, Energieberatung, Sanitärinstallation sowie nachhaltiger Energie wie Phtovoltaikanlagen sind wir der richtige Ansprechpartner” Source: RevenueBase Database · checked Sep 19, 2026
17	Haustechnik	Indirect evidence	Staas, SwitzerlandHQ checked Sep 19, 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 19, 2026
18	Zerogeo Energy Gmbh	Partial evidence	Zug, SwitzerlandHQ checked Sep 19, 2026	1-10	6 contacts →
	Partial evidence “We are a leading European Renewable, Low Carbon Geothermal Energy company delivering delivering Energy From Rocks™.” Source: RevenueBase Database · checked Sep 19, 2026
19	Ecoenergy Swiss AG	Indirect evidence	Volketswil, SwitzerlandHQ checked Sep 19, 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 19, 2026
20	Staub Heizungen AG	Indirect evidence	Steckborn District, SwitzerlandHQ checked Sep 19, 2026	11-50	6 contacts →
	Indirect evidence “Für welches Heizsystem Sie sich auch entscheiden: Wärmepumpen mit oder ohne Erdsonden, oder Biomasse-Heizkessel.” Source: RevenueBase Database · checked Sep 19, 2026
21	Gfeller Heizungsbau AG	Indirect evidence	Bern, SwitzerlandHQ checked Sep 19, 2026	11-50	5 contacts →
	Indirect evidence “Wärme ist wohltuend, entspannend, angenehm.” Source: RevenueBase Database · checked Sep 19, 2026
22	Heller AG	Indirect evidence	St. Margrethen, SwitzerlandHQ checked Sep 19, 2026	11-50	5 contacts →
	Indirect evidence “Wir planen, entwickeln und realisieren zukunftsorientiert, vorausschauend, kosten- und umweltbewusst die optimale Kälte, Klima und Energie-Technik für unsere Kunden.” Source: RevenueBase Database · checked Sep 19, 2026
23	Servicetech Gmbh	Indirect evidence	Röthenbach, SwitzerlandHQ checked Sep 19, 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 19, 2026
24	Servodomo SA Vezzoligas SA	Indirect evidence	Bedano, SwitzerlandHQ checked Sep 19, 2026	11-50	4 contacts →
	Indirect evidence “Dal 1961.” Source: RevenueBase Database · checked Sep 19, 2026
25	Ammann Schmid AG	Indirect evidence	Uster, SwitzerlandHQ checked Sep 19, 2026	11-50	4 contacts →
	Indirect evidence “SANIERUNG/ERSATZANLAGEN Stimmen die Temperaturen oder Emissionswerte nicht mehr?” Source: RevenueBase Database · checked Sep 19, 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: geothermal heating installation 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 geothermal heating installation companies.
Partial evidence: Its own public description names part of geothermal heating installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geothermal heating installation 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 177 geothermal heating installation companies based in Switzerland

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Geothermal heating installation companies based in Switzerland at a glance

As of Sep 19, 2026

27.2%Verified-email coverage

4.2Average contacts per company

1-10Median size (employees)

4.5%Largest-city concentration · Geneve

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

100

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 177 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 geothermal heating installation 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 “geothermal heating installation 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 geothermal heating installation 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 geothermal heating installation 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, 204 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 19, 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 geothermal heating installation 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 geothermal heating installation companies are there based in Switzerland?

RevenueBase identified 177 geothermal heating installation 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?

Domotec AG, headquartered in Aarburg, tops this list with the largest team on record.

Which city has the most geothermal heating installation companies?

Geneve leads with 8 headquartered companies, followed by Basel (3) and Lausanne (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 204 verified decision-maker contacts tracked across these 177 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 19, 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.