Company lists · Data refreshed September 2026

Top 25 Energy consulting services based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 400 companies tracked

RevenueBase identified 400 energy consulting services headquartered in Switzerland as of September 2026 and tracks 2,009 professional contacts across them, including 842 with verified work emails. Zurich is the largest hub.

This list covers energy consulting services 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 21, 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 21, 2026 86% judged on-target in blind review

400Companies

2,009Contacts tracked

842Verified emails

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The 25 largest energy consulting services based in Switzerland

Ranked by team size

Top 25 of 400 energy consulting services based in Switzerland, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to energy consulting services: 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	Esolva AG	Partial evidence	Weinfelden, SwitzerlandHQ checked Sep 21, 2026	51-200	91 contacts →
	Partial evidence “Wir sind deine professionelle Partnerin mit langjähriger Praxiserfahrung in der Energie- und Industrie-Branche.” Source: RevenueBase Database · checked Sep 21, 2026
2	Romande Energie Services SA	Partial evidence	Préverenges, SwitzerlandHQ checked Sep 21, 2026	501-1,000	84 contacts →
	Partial 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 21, 2026
3	Horizonte-Group AG	Strong evidence	Luzern, SwitzerlandHQ checked Sep 21, 2026	51-200	58 contacts →
	Strong evidence “Management Consulting für die Energiewirtschaft Wir gestalten die Energiezukunft – mit innovativen Strategien, digitalen Lösungen und partnerschaftlicher Zusammenarbeit.” Source: RevenueBase Database · checked Sep 21, 2026
4	Renera AG	Partial evidence	Basel, SwitzerlandHQ checked Sep 21, 2026	51-200	54 contacts →
	Partial evidence “Renera AG (formerly Energie Zukunft Schweiz AG) is a leading force on the road to a fully renewable energy world.” Source: RevenueBase Database · checked Sep 21, 2026
5	Weinmann-Energies SA	Partial evidence	Echallens, SwitzerlandHQ checked Sep 21, 2026	51-200	47 contacts →
	Partial evidence “Weinmann-Energies est un bureau d’ingénieurs-conseils EPFL-SIA-SuisseIng.” Source: RevenueBase Database · checked Sep 21, 2026
6	Lemon Consult AG	Strong evidence	Zürich, SwitzerlandHQ checked Sep 21, 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 21, 2026
7	Ista Swiss AG	Partial evidence	Oftringen, SwitzerlandHQ checked Sep 21, 2026	51-200	35 contacts →
	Partial 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 21, 2026
8	Energie-Agentur DER Wirtschaft Agence DE L Énergie Pour L Économie	Partial evidence	Zürich, SwitzerlandHQ checked Sep 21, 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 21, 2026
9	SSE Engineering AG	Partial evidence	Ostermundigen, SwitzerlandHQ checked Sep 21, 2026	11-50	31 contacts →
	Partial evidence “Wir bieten Bauherren und Architekten Beratung und Planung für professionelle Lösungen in Energie und Automation.” Source: RevenueBase Database · checked Sep 21, 2026
10	Ompex AG	Partial evidence	Zurich, SwitzerlandHQ checked Sep 21, 2026	11-50	30 contacts →
	Partial evidence “Ompex ist Ihr Energiedienstleister, Ihr Energieexperte und Ihr Energiewegbereiter.” Source: RevenueBase Database · checked Sep 21, 2026
11	Ampere Dynamic	Partial evidence	Zurich, SwitzerlandHQ checked Sep 21, 2026	11-50	29 contacts →
	Partial evidence “Als Experte für nachhaltige und schlüsselfertige Energielösungen im Industrie & Gewerbesektor denken wir Energie ganzheitlich.” Source: RevenueBase Database · checked Sep 21, 2026
12	Durena AG	Indirect evidence	Lenzburg, SwitzerlandHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “Unserem Ingenieurunternehmen ist es ein grosses Anliegen, individuell und persönlich auf Ihre Wünsche einzugehen.” Source: RevenueBase Database · checked Sep 21, 2026
13	Tecnoservice Engineering SA	Indirect evidence	Fribourg, SwitzerlandHQ checked Sep 21, 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 21, 2026
14	Enastra AG	Partial evidence	Zurich, SwitzerlandHQ checked Sep 21, 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 21, 2026
15	Weisskopf Partner Gmbh	Partial evidence	Zürich, SwitzerlandHQ checked Sep 21, 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 21, 2026
16	The Advisory House	Partial evidence	Zug, SwitzerlandHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “The Advisory House specializes in the European energy industry with offices in Germany, Austria and Switzerland.” Source: RevenueBase Database · checked Sep 21, 2026
17	Resiq AG	Indirect evidence	Burgdorf, SwitzerlandHQ checked Sep 21, 2026	11-50	24 contacts →
	Indirect evidence “RESiQ setzt sich für den erfolgreichen Einsatz von erneuerbaren Ressourcen (RES) ein und ermöglicht durch intelligente technische Lösungen (iQ) deren effiziente und nachhaltige…” Source: RevenueBase Database · checked Sep 21, 2026
18	The Meeco Group	Partial evidence	Zug, SwitzerlandHQ checked Sep 21, 2026	51-200	24 contacts →
	Partial evidence “As a leader in clean renewable energy, meeco™ has provided clients with services and solutions for over 423 MW across three continents.” Source: RevenueBase Database · checked Sep 21, 2026
19	ID GO Management SA	Indirect evidence	Morges, SwitzerlandHQ checked Sep 21, 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 21, 2026
20	Ingenieurbüro IEM AG	Partial evidence	Thun, SwitzerlandHQ checked Sep 21, 2026	11-50	21 contacts →
	Partial evidence “Wir sind ein national tätiges, anerkanntes Ingenieurbüro für Energie- und Gebäudetechnikplanungen, führend in unseren Kompetenzen und Dienstleistungen.” Source: RevenueBase Database · checked Sep 21, 2026
21	Green Energy Venture AG	Partial evidence	Lyssach, SwitzerlandHQ checked Sep 21, 2026	51-200	20 contacts →
	Partial evidence “Green Energy Venture is a leading advisory and services firm which operates along the value chain of renewable energies.” Source: RevenueBase Database · checked Sep 21, 2026
22	SB Technique SA	Indirect evidence	Genève, SwitzerlandHQ checked Sep 21, 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 21, 2026
23	Guggisberg Kurz AG	Indirect evidence	Ostermundigen, SwitzerlandHQ checked Sep 21, 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 21, 2026
24	Osterwalder Zürich AG	Partial evidence	Zürich, SwitzerlandHQ checked Sep 21, 2026	11-50	17 contacts →
	Partial evidence “Als Ihr Energieexperte in der Deutschschweiz beraten wir Sie persönlich und beliefern Unternehmen und Privathaushalte mit maximaler Flexibilität zu einem fairen Preis.” Source: RevenueBase Database · checked Sep 21, 2026
25	Swisselectricity.com SA	Partial evidence	Genève, SwitzerlandHQ checked Sep 21, 2026	11-50	16 contacts →
	Partial evidence “SwissElectricity has been negotiating energy purchasing conditions and grid connection costs on the Swiss and European markets since 1998.” Source: RevenueBase Database · checked Sep 21, 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 consulting services. 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 consulting services.
Partial evidence: Its own public description names part of energy consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy consulting services. 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 400 energy consulting services based in Switzerland

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Energy consulting services based in Switzerland at a glance

As of Sep 21, 2026

41.9%Verified-email coverage

5.0Average contacts per company

1-10Median size (employees)

10.0%Largest-city concentration · Zurich

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

295

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 400 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 consulting services, 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 consulting services”. 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 consulting services), 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 consulting services, 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, 842 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 21, 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.

Energy consulting services by metro

Energy consulting services in Zurich40

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 consulting services, 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 consulting services are there based in Switzerland?

RevenueBase identified 400 energy consulting services 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?

Esolva AG, headquartered in Weinfelden, tops this list with the largest team on record.

Which city has the most energy consulting services?

Zurich leads with 40 headquartered companies, followed by Geneve (12) and Lausanne (12).

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 842 verified decision-maker contacts tracked across these 400 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 21, 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.