Company lists · Data refreshed October 2026

Top 25 Energy efficiency optimization companies based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 313 companies tracked

RevenueBase identified 313 company matches for energy efficiency optimization companies associated with Switzerland as of October 2026 and tracks 1,777 professional contacts across them, including 772 with verified work emails. Zurich is the largest hub.

This list covers company matches for energy efficiency optimization companies associated with Switzerland, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 12, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 12, 2026 How this list was built

313Companies

1,777Contacts tracked

772Verified emails

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The 25 largest energy efficiency optimization companies based in Switzerland

Ranked by team size

Top 25 of 313 company matches for energy efficiency optimization companies based in Switzerland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	R B Engineering AG	Exact match	Brugg, SwitzerlandHQ recorded Oct 12, 2026	51-200	62 contacts →
	Exact match “Als führendes Ingenieurunternehmen sind wir in allen Gebäudetechnikgebieten zu Hause.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	Weinmann-Energies SA	Exact match	Echallens, SwitzerlandHQ recorded Oct 12, 2026	51-200	50 contacts →
	Exact match “Weinmann-Energies est un bureau d’ingénieurs-conseils EPFL-SIA-SuisseIng.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	Anex Ingenieure AG	Exact match	Zürich, SwitzerlandHQ recorded Oct 12, 2026	51-200	40 contacts →
	Exact match “Anex Ingenieure ist ein Beratungs- und Planungsunternehmen für Gebäudetechnik, das ressourcenschonende Energie- und Medienkonzepte für Prozesse, Gebäude und Areale entwickelt.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Lemon Consult AG	Exact match	Zürich, SwitzerlandHQ recorded Oct 12, 2026	11-50	39 contacts →
	Exact match “Lemon Consult is a specialized engineering and consulting office for energy efficiency, sustainability and renewable energies in the area of building and technical systems.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	SSE Engineering AG	Exact match	Ostermundigen, SwitzerlandHQ recorded Oct 12, 2026	11-50	29 contacts →
	Exact match “Wir bieten Bauherren und Architekten Beratung und Planung für professionelle Lösungen in Energie und Automation.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	Energa SA	Exact match	Lausanne, SwitzerlandHQ recorded Oct 12, 2026	11-50	29 contacts →
	Exact match “Situé à Yverdon-les-Bains et à Lausanne, ENERGA SA est un bureau d’ingénieurs-conseils EPFL-SIA actif sur l’ensemble de la Suisse romande.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	Energie-Agentur DER Wirtschaft Agence DE L Énergie Pour L Économie	Exact match	Zürich, SwitzerlandHQ recorded Oct 12, 2026	51-200	27 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Waldhauser Hermann AG	Exact match	Münchenstein, SwitzerlandHQ recorded Oct 12, 2026	51-200	27 contacts →
	Exact match “Haustechnik ist eine komplexe Angelegenheit und steht in direktem Zusammenhang mit Benutzerzufriedenheit, Betriebssicherheit, Erstellungs- und Betriebskosten sowie Umweltbelastung.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Tecnoservice Engineering SA	Exact match	Fribourg, SwitzerlandHQ recorded Oct 12, 2026	51-200	27 contacts →
	Exact match “TECNOSERVICE ENGINEERING SA est un bureau d’études et d’ingénieurs conseils pour les installations techniques et études énergétiques liées au bâtiment et à l’industrie.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	Kalt Halbeisen Ingenieurbüro AG	Exact match	Zürich, SwitzerlandHQ recorded Oct 12, 2026	51-200	26 contacts →
	Exact match “Wir sind ein erfolgreiches Ingenieur, Planungs- und Beratungsunternehmen im Bereich der Energie- und Gebäudetechnik.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Weisskopf Partner Gmbh	Exact match	Zürich, SwitzerlandHQ recorded Oct 12, 2026	11-50	26 contacts →
	Exact match “Die Steigerung von Energieeffizienz und den Einsatz von erneuerbaren Energien verfolgen wir mit Herzblut.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Durena AG	Exact match	Lenzburg, SwitzerlandHQ recorded Oct 12, 2026	11-50	25 contacts →
	Exact match “Unserem Ingenieurunternehmen ist es ein grosses Anliegen, individuell und persönlich auf Ihre Wünsche einzugehen.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	AZ Ingénieurs SA	Exact match	Lausanne 10, SwitzerlandHQ recorded Oct 12, 2026	11-50	24 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Grünig&partner AG	Exact match	Liebefeld, SwitzerlandHQ recorded Oct 12, 2026	11-50	23 contacts →
	Exact match “Wir von Grünig & Partner haben eine Passion: die Gebäudetechnik.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	Ecco2 Solutions AG	Exact match	Givisiez, SwitzerlandHQ recorded Oct 12, 2026	11-50	22 contacts →
	Exact match “ECCO2 Solutions AG offers innovative services for energy efficiency in buildings.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	Enastra AG	Exact match	Zurich, SwitzerlandHQ recorded Oct 12, 2026	11-50	22 contacts →
	Exact match “Das Vernetzen der Fachgebiete Strategie & Konzept, Bauherrentreuhand, Energiecontrolling und Nebenkosten ist das Fundament unserer Kernkompetenz.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Alfacel AG	Exact match	Cham, SwitzerlandHQ recorded Oct 12, 2026	11-50	20 contacts →
	Exact match “Intelligente Gebäudeoptimierung Willkommen bei Alfacel - einem der schweizweit führenden Ingenieurbüros auf dem Gebiet der Gebäudeautomation und Energieoptimierung.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	ID GO Management SA	Exact match	Morges, SwitzerlandHQ recorded Oct 12, 2026	11-50	20 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Energiebüro AG	Exact match	Zurich, SwitzerlandHQ recorded Oct 12, 2026	11-50	19 contacts →
	Exact match “energiebüro ist das Kompetenzzentrum für Solar- und Wasserkraft, Energieeffizienz und Gebäudesysteme.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Ifec Ingegneria SA	Exact match	Rivera-monteceneri, SwitzerlandHQ recorded Oct 12, 2026	51-200	19 contacts →
	Exact match “IFEC ingegneria SA is a consulting company in the field of energy, building physics, acoustics and applied environmental sciences.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	Ingenieurbüro IEM AG	Exact match	Thun, SwitzerlandHQ recorded Oct 12, 2026	11-50	18 contacts →
	Exact match “Wir sind ein national tätiges, anerkanntes Ingenieurbüro für Energie- und Gebäudetechnikplanungen, führend in unseren Kompetenzen und Dienstleistungen.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	Adolf Krebs AG	Exact match	Thun, SwitzerlandHQ recorded Oct 12, 2026	51-200	18 contacts →
	Exact match “Aber ebenso viel mit harten Kalkulationen, Energiemanagement, mit Wissen, was zu tun ist.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	PIC Energies SA	Exact match	Geneva, SwitzerlandHQ recorded Oct 12, 2026	11-50	17 contacts →
	Exact match “Le bureau est actif dans les domaines de l’énergétique des bâtiments, du chauffage, de la ventilation, de la climatisation et du sanitaire.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	Guggisberg Kurz AG	Exact match	Ostermundigen, SwitzerlandHQ recorded Oct 12, 2026	51-200	17 contacts →
	Exact match “Mit über 90 erfahrene Mitarbeitenden ist die Guggisberg Kurz AG in der Lage sowohl grosse Objekte auszuführen, als auch sehr flexibel zu agieren.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	SB Technique SA	Exact match	Geneva, SwitzerlandHQ recorded Oct 12, 2026	11-50	16 contacts →
	Exact match “SB technique est un bureau d'Ingénieur Conseil en chauffage, ventilation, climatisation et sécurité du bâtiment développant des concepts énergétiques ambitieux pour des…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “energy efficiency optimization companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 313 energy efficiency optimization companies based in Switzerland

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Energy efficiency optimization companies based in Switzerland at a glance

As of Oct 12, 2026

43.4%Verified-email coverage

5.7Average contacts per company

1-10Median size (employees)

7.0%Largest-city concentration · Zurich

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

209

11-50

51-200

201-500

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 313 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Switzerland whose business descriptions match “energy efficiency optimization companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 772 professional contacts with verified work emails across the full matched dataset. 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 October 12, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy efficiency optimization companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficiency optimization companies are there based in Switzerland?

RevenueBase identified 313 company matches for energy efficiency optimization companies associated with Switzerland as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

R B Engineering AG tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most energy efficiency optimization companies?

Zurich leads with 22 company records, followed by Lausanne (14) and Geneva (11).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 772 professional contacts with verified work emails tracked across these 313 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 12, 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 SmartSearch, 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.