Company lists · Data refreshed September 2026

Top 25 Energy efficiency consultants based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 187 companies tracked

RevenueBase identified 187 energy efficiency consultants headquartered in Switzerland as of September 2026 and tracks 959 professional contacts across them, including 366 with verified work emails. Zurich is the largest hub.

This list covers energy efficiency consultants 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

187Companies

959Contacts tracked

366Verified emails

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The 25 largest energy efficiency consultants based in Switzerland

Ranked by team size

Top 25 of 187 energy efficiency consultants 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 consultants: 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	Sontex SA	Partial evidence	Sonceboz-sombeval, SwitzerlandHQ checked Sep 16, 2026	51-200	77 contacts →
	Partial evidence “For over 30 years, Sontex has offered innovative systems for the precise collection of energy consumption data.” Source: RevenueBase Database · checked Sep 16, 2026
2	Weinmann-Energies SA	Partial evidence	Echallens, SwitzerlandHQ checked Sep 16, 2026	51-200	47 contacts →
	Partial evidence “Weinmann-Energies est un bureau d’ingénieurs-conseils EPFL-SIA-SuisseIng.” Source: RevenueBase Database · checked Sep 16, 2026
3	Lemon Consult AG	Strong evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	11-50	37 contacts →
	Strong 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
4	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
5	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
6	Tecnoservice Engineering SA	Indirect evidence	Fribourg, SwitzerlandHQ checked Sep 16, 2026	51-200	26 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
7	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
8	Weisskopf Partner Gmbh	Partial evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	11-50	25 contacts →
	Partial evidence “Die Steigerung von Energieeffizienz und den Einsatz von erneuerbaren Energien verfolgen wir mit Herzblut.” Source: RevenueBase Database · checked Sep 16, 2026
9	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
10	Adolf Krebs AG	Partial evidence	Thun, SwitzerlandHQ checked Sep 16, 2026	51-200	15 contacts →
	Partial evidence “Aber ebenso viel mit harten Kalkulationen, Energiemanagement, mit Wissen, was zu tun ist.” Source: RevenueBase Database · checked Sep 16, 2026
11	Enerplan AG	Partial evidence	Ostermundigen, SwitzerlandHQ checked Sep 16, 2026	11-50	15 contacts →
	Partial 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
12	Bms-Energietechnik AG	Partial evidence	Wilderswil, SwitzerlandHQ checked Sep 16, 2026	11-50	12 contacts →
	Partial evidence “Ihr Kompetenz-Zentrum für Energieeffizenz!” Source: RevenueBase Database · checked Sep 16, 2026
13	Energestion SA	Partial evidence	Les Acacias, SwitzerlandHQ checked Sep 16, 2026	11-50	12 contacts →
	Partial evidence “Energestion SA est un bureau d'ingénieurs conseils du bâtiment et en industrie.” Source: RevenueBase Database · checked Sep 16, 2026
14	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
15	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
16	Emch Berger Revelio AG	Indirect evidence	Bern, SwitzerlandHQ checked Sep 16, 2026	11-50	10 contacts →
	Indirect evidence “Die Emch+Berger Revelio AG ist ein Unternehmen der 1953 gegründeten Emch+Berger Gruppe.” Source: RevenueBase Database · checked Sep 16, 2026
17	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
18	Ennovatis Schweiz AG	Partial evidence	Olten, SwitzerlandHQ checked Sep 16, 2026	11-50	9 contacts →
	Partial evidence “ennovatis bietet Ihnen clevere Energielösungen und langjährige Expertise aus einer Hand zu den Themen Energiemanagement, Abrechnungen und Engineering von Energiesystemen.” Source: RevenueBase Database · checked Sep 16, 2026
19	Komfonie Engineering AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	11-50	9 contacts →
	Indirect evidence “Als kompetentes und erfahrenes Planungsunternehmen bieten wir Ihnen eine breite Palette von Planungs, Beratungs- und Managementleistungen für sämtliche Projektphasen in den…” Source: RevenueBase Database · checked Sep 16, 2026
20	Navitas Consilium SA	Indirect evidence	Martigny, SwitzerlandHQ checked Sep 16, 2026	1-10	8 contacts →
	Indirect evidence “Navitas Consilium soutient les collectivités publiques et le secteur privé vers une utilisation rationnelle de l'énergie et son approvisionnement durable.” Source: RevenueBase Database · checked Sep 16, 2026
21	Bhend Architektur	Indirect evidence	Oftringen, SwitzerlandHQ checked Sep 16, 2026	1-10	8 contacts →
	Indirect evidence “Beratung, Planung, Realisierung Ein- und Mehrfamilienhäuser, Schulhäuser, Pflegeheime, Industrie, Gewerbe” Source: RevenueBase Database · checked Sep 16, 2026
22	Réalisations Techniques Multiples S.A	Indirect evidence	Martigny, SwitzerlandHQ checked Sep 16, 2026	11-50	7 contacts →
	Indirect evidence “Notre but, proposer des solutions qui conjuguent performance électrique et écologique en minimisant la consommation électrique.” Source: RevenueBase Database · checked Sep 16, 2026
23	Eco-Building Concept	Indirect evidence	Les Acacias, SwitzerlandHQ checked Sep 16, 2026	1-10	7 contacts →
	Indirect evidence “Eco-Building Concept est un bureau d'ingénieurs spécialisé en énergétique du bâtiment et dans l'étude d'installations de chauffage, de ventilation et de climatisation- Études…” Source: RevenueBase Database · checked Sep 16, 2026
24	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
25	Energyoptimizer AG	Partial evidence	Pieterlen, SwitzerlandHQ checked Sep 16, 2026	11-50	6 contacts →
	Partial evidence “EnergyOptimizer steht für ganzheitliches Energiemanagement das Ressourcen schont und Ihre Energiebilanz verbessert.” 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 consultants. 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 consultants.
Partial evidence: Its own public description names part of energy efficiency consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency consultants. 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 187 energy efficiency consultants based in Switzerland

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Energy efficiency consultants based in Switzerland at a glance

As of Sep 16, 2026

38.2%Verified-email coverage

5.1Average contacts per company

1-10Median size (employees)

7.0%Largest-city concentration · Zurich

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

139

11-50

51-200

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 187 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 consultants, 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 consultants”. 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 consultants), 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 consultants, 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, 366 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 consultants, 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 consultants are there based in Switzerland?

RevenueBase identified 187 energy efficiency consultants 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?

Sontex SA, headquartered in Sonceboz-Sombeval, tops this list with the largest team on record.

Which city has the most energy efficiency consultants?

Zurich leads with 13 headquartered companies, followed by Geneve (8) and Lausanne (5).

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 366 verified decision-maker contacts tracked across these 187 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.