Company lists · Data refreshed September 2026

Top 25 Building decarbonization firms based in Switzerland

Name: Building decarbonization firms based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 265 companies tracked

RevenueBase identified 265 building decarbonization firms headquartered in Switzerland as of September 2026 and tracks 1,719 professional contacts across them, including 767 with verified work emails. Zurich is the largest hub.

This list covers building decarbonization firms 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

265Companies

1,719Contacts tracked

767Verified emails

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The 25 largest building decarbonization firms based in Switzerland

Ranked by team size

Top 25 of 265 building decarbonization firms 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 building decarbonization firms: 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	Eicher Pauli	Indirect evidence	Bern, SwitzerlandHQ checked Sep 16, 2026	201-500	100 contacts →
	Indirect evidence “We are committed to convincing, practical and innovative solutions.” Source: RevenueBase Database · checked Sep 16, 2026
2	Romande Energie Services SA	Indirect evidence	Préverenges, SwitzerlandHQ checked Sep 16, 2026	501-1,000	84 contacts →
	Indirect evidence “Experts dans le domaine des services énergétiques et de la décarbonisation, les 500 collaborateurs de Romande Energie Services SA, société du Groupe Romande Energie, sont à votre…” Source: RevenueBase Database · checked Sep 16, 2026
3	Signa-Terre SA	Indirect evidence	Genève, SwitzerlandHQ checked Sep 16, 2026	11-50	48 contacts →
	Indirect evidence “The energy transition is a priority.” Source: RevenueBase Database · checked Sep 16, 2026
4	Weinmann-Energies SA	Indirect evidence	Echallens, SwitzerlandHQ checked Sep 16, 2026	51-200	47 contacts →
	Indirect evidence “Weinmann-Energies est un bureau d’ingénieurs-conseils EPFL-SIA-SuisseIng.” Source: RevenueBase Database · checked Sep 16, 2026
5	AFC AIR Flow Consulting AG	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	51-200	46 contacts →
	Indirect evidence “AFC AG gestaltet die Zukunft des energieeffizienten, nachhaltigen und sicheren Bauens.” Source: RevenueBase Database · checked Sep 16, 2026
6	Anex Ingenieure AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	51-200	40 contacts →
	Indirect evidence “Anex Ingenieure ist ein Beratungs- und Planungsunternehmen für Gebäudetechnik, das ressourcenschonende Energie- und Medienkonzepte für Prozesse, Gebäude und Areale entwickelt.” Source: RevenueBase Database · checked Sep 16, 2026
7	Lemon Consult AG	Partial evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	11-50	37 contacts →
	Partial evidence “Lemon Consult is a specialized engineering and consulting office for energy efficiency, sustainability and renewable energies in the area of building and technical systems.” Source: RevenueBase Database · checked Sep 16, 2026
8	Ista Swiss AG	Indirect evidence	Oftringen, SwitzerlandHQ checked Sep 16, 2026	51-200	35 contacts →
	Indirect evidence “Die ista swiss ag ist seit 1973 eine führende Immobiliendienstleisterin in der Schweiz und spezialisiert auf intelligente Lösungen im Energie- und Ressourcenmanagement.” Source: RevenueBase Database · checked Sep 16, 2026
9	Kalt Halbeisen Ingenieurbüro AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	51-200	32 contacts →
	Indirect evidence “Wir sind ein erfolgreiches Ingenieur, Planungs- und Beratungsunternehmen im Bereich der Energie- und Gebäudetechnik.” Source: RevenueBase Database · checked Sep 16, 2026
10	Energie-Agentur DER Wirtschaft Agence DE L Énergie Pour L Économie	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	51-200	31 contacts →
	Indirect 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
11	Waldhauser Hermann AG	Indirect evidence	Münchenstein, SwitzerlandHQ checked Sep 16, 2026	51-200	30 contacts →
	Indirect evidence “Haustechnik ist eine komplexe Angelegenheit und steht in direktem Zusammenhang mit Benutzerzufriedenheit, Betriebssicherheit, Erstellungs- und Betriebskosten sowie Umweltbelastung.” Source: RevenueBase Database · checked Sep 16, 2026
12	AZ Ingénieurs SA	Indirect evidence	Lausanne 10, SwitzerlandHQ checked Sep 16, 2026	11-50	27 contacts →
	Indirect evidence “La marque az ingénieurs regroupe des sociétés privées réunissant des ingénieurs-conseils dans les domaines de l'énergie, de la sécurité et des installations techniques pour le…” Source: RevenueBase Database · checked Sep 16, 2026
13	Ecco2 Solutions AG	Partial evidence	Givisiez, SwitzerlandHQ checked Sep 16, 2026	11-50	26 contacts →
	Partial evidence “ECCO2 Solutions AG offers innovative services for energy efficiency in buildings.” Source: RevenueBase Database · checked Sep 16, 2026
14	Enastra AG	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	11-50	25 contacts →
	Indirect evidence “Das Vernetzen der Fachgebiete Strategie & Konzept, Bauherrentreuhand, Energiecontrolling und Nebenkosten ist das Fundament unserer Kernkompetenz.” Source: RevenueBase Database · checked Sep 16, 2026
15	Weisskopf Partner Gmbh	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	11-50	25 contacts →
	Indirect evidence “Die Steigerung von Energieeffizienz und den Einsatz von erneuerbaren Energien verfolgen wir mit Herzblut.” Source: RevenueBase Database · checked Sep 16, 2026
16	Vema S.A. Vema Carbon	Indirect evidence	Fribourg, SwitzerlandHQ checked Sep 16, 2026	11-50	24 contacts →
	Indirect evidence “VEMA CARBON is a practical expert in climate solutions.” Source: RevenueBase Database · checked Sep 16, 2026
17	ID GO Management SA	Indirect evidence	Morges, SwitzerlandHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “ID GO Management SA est une société de services, alliant des compétences uniques à la croisée de l’énergie, la physique du bâtiment et l’architecture pour mettre en œuvre la…” Source: RevenueBase Database · checked Sep 16, 2026
18	Ingenieurbüro IEM AG	Indirect evidence	Thun, SwitzerlandHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Wir sind ein national tätiges, anerkanntes Ingenieurbüro für Energie- und Gebäudetechnikplanungen, führend in unseren Kompetenzen und Dienstleistungen.” Source: RevenueBase Database · checked Sep 16, 2026
19	SB Technique SA	Indirect evidence	Genève, SwitzerlandHQ checked Sep 16, 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 16, 2026
20	Optiml	Partial evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	11-50	18 contacts →
	Partial evidence “Optiml's Real Estate Decision Intelligence (REDI) platform empowers asset managers, investors, and consultancies to create and optimize cost-effective, reliable decarbonization…” Source: RevenueBase Database · checked Sep 16, 2026
21	Guggisberg Kurz AG	Indirect evidence	Ostermundigen, SwitzerlandHQ checked Sep 16, 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 16, 2026
22	HMB Partners AG	Partial evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “We are a company with core competencies in project development, project management and consultancy in the fields of buildings, spaces and energy.” Source: RevenueBase Database · checked Sep 16, 2026
23	PIC Energies SA	Indirect evidence	Genève, SwitzerlandHQ checked Sep 16, 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 16, 2026
24	Adolf Krebs AG	Indirect evidence	Thun, SwitzerlandHQ checked Sep 16, 2026	51-200	15 contacts →
	Indirect evidence “Aber ebenso viel mit harten Kalkulationen, Energiemanagement, mit Wissen, was zu tun ist.” Source: RevenueBase Database · checked Sep 16, 2026
25	Enerplan AG	Indirect evidence	Ostermundigen, SwitzerlandHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “Wir sind ein Ingenieurbüro für Haus- Energie- und Gebäudetechnik und sind seit 1981 in Bern, Solothurn, Olten und Zürich tätig.” 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: building decarbonization firms. 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 building decarbonization firms.
Partial evidence: Its own public description names part of building decarbonization firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name building decarbonization firms. 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 265 building decarbonization firms based in Switzerland

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Building decarbonization firms based in Switzerland at a glance

As of Sep 16, 2026

44.6%Verified-email coverage

6.5Average contacts per company

1-10Median size (employees)

8.7%Largest-city concentration · Zurich

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

183

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 265 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 building decarbonization firms, 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 “building decarbonization firms”. 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 building decarbonization firms), 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 building decarbonization firms, 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, 767 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 building decarbonization firms, 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 building decarbonization firms are there based in Switzerland?

RevenueBase identified 265 building decarbonization firms 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?

Eicher Pauli, headquartered in Bern, tops this list with the largest team on record.

Which city has the most building decarbonization firms?

Zurich leads with 23 headquartered companies, followed by Lausanne (13) and Geneve (10).

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 767 verified decision-maker contacts tracked across these 265 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.