Company lists · Data refreshed September 2026

Top 22 Energy auditing and consulting firms based in Austria

RevenueBase identified 53 energy auditing and consulting firms headquartered in Austria as of September 2026 and tracks 255 professional contacts across them, including 123 with verified work emails. Wien is the largest hub.

This list covers energy auditing and consulting firms headquartered in Austria, 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 28, 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 28, 2026 86% judged on-target in blind review
53Companies
255Contacts tracked
123Verified emails
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The 22 largest energy auditing and consulting firms based in Austria

Ranked by team size
Top 22 of 53 energy auditing and consulting firms based in Austria, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy auditing and consulting 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceVienna, AustriaHQ checked Sep 28, 202611-5047 contacts →

Partial evidence

“CES clean energy solutions is an enginneering consultant company and serves you as competence centre for energy efficiency, renewable energy and sustainable development.”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceVienna, AustriaHQ checked Sep 28, 202651-20038 contacts →

Indirect evidence

“ALLPLAN GmbH was founded in Vienna in 1967.”

Source: RevenueBase Database · checked Sep 28, 2026
3Strong evidenceVienna, AustriaHQ checked Sep 28, 202611-5020 contacts →

Strong evidence

“e7 is a private research and consulting company specialized in the energy efficiency and the renewable energy sector.”

Source: RevenueBase Database · checked Sep 28, 2026
4Partial evidenceWien, AustriaHQ checked Sep 28, 202611-5015 contacts →

Partial evidence

“Mit unserer langjährigen Erfahrung im Energieeinkauf und unserem hohen technischen Know-How begleiten wir unsere Kunden partnerschaftlich und auf Augenhöhe in die Energiezukunft.”

Source: RevenueBase Database · checked Sep 28, 2026
5Partial evidenceLinz, AustriaHQ checked Sep 28, 202611-5014 contacts →

Partial evidence

“IfEA - Institut für Energieausweis GmbH is a real estate company based out of Böhmerwaldstraße 3, Linz, Austria.”

Source: RevenueBase Database · checked Sep 28, 2026
6Partial evidenceGraz, AustriaHQ checked Sep 28, 20261,001-5,00012 contacts →

Partial evidence

“Die TBH Ingenieur GmbH ist IHR kompetenter Partner für ganzheitliche Lösungen, die Ihr Gebäude und energietechnischen Anlagen energieeffizienter und nachhaltiger machen.”

Source: RevenueBase Database · checked Sep 28, 2026
7Strong evidenceVienna, AustriaHQ checked Sep 28, 202611-506 contacts →

Strong evidence

“BLUESAVE Consulting is your partner in the re-design of buildings, energy performance certificates, green building certification, technical due diligence audits, everything you…”

Source: RevenueBase Database · checked Sep 28, 2026
8Partial evidenceVienna, AustriaHQ checked Sep 28, 20261-106 contacts →

Partial evidence

“We address the most urgent challenges of data centre operators, industrial companies, municipalities and the energy sector when it comes to transforming their infrastructure at…”

Source: RevenueBase Database · checked Sep 28, 2026
9Partial evidenceKirchbichl, AustriaHQ checked Sep 28, 20261-106 contacts →

Partial evidence

“Unsere Firmenphilosophie als Energieberatungsunternehmen basiert auf dem Ziel, unseren Kunden dabei zu helfen, ihre Energieeffizienz zu verbessern und ihre Energiekosten zu…”

Source: RevenueBase Database · checked Sep 28, 2026
10Partial evidenceKundl, AustriaHQ checked Sep 28, 202611-506 contacts →

Partial evidence

“Wir beraten Sie gerne bei Ihrer Planung für die komplette Energie- Gebäude- und Elektrotechnik.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceFeistritz An Der Drau, AustriaHQ checked Sep 28, 202611-505 contacts →

Indirect evidence

“Als junges, aufstrebendes Unternehmen mit sehr erfahrenen Mitarbeitern begleiten und planen wir, als Ingenieurbüro für Elektrotechnik Ihr Vorhaben mit höchster elektrotechnischer…”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceSchäffern, AustriaHQ checked Sep 28, 202611-505 contacts →

Partial evidence

“BERATEN - PLANEN - BAUEN - ÜBERWACHEN: Mit diesen kurzen Schlagworten können wir unser Unternehmen Bau- & Energietechnik umschreiben.”

Source: RevenueBase Database · checked Sep 28, 2026
13Partial evidenceVienna, AustriaHQ checked Sep 28, 20261-105 contacts →

Partial evidence

“A Short History Originally established in 2011 as a joint venture between denkstatt GmbH and ENERTEC - Naftz & Partner GmbH & Co KG, the company known as denkstatt & enertec (d&e…”

Source: RevenueBase Database · checked Sep 28, 2026
14Partial evidenceNeckenmarkt, AustriaHQ checked Sep 28, 20261-104 contacts →

Partial evidence

“Ingenieurbüro für: thermische Energietechnik & industrielle Energieeffizienz”

Source: RevenueBase Database · checked Sep 28, 2026
15Partial evidenceArnreit, AustriaHQ checked Sep 28, 202651-2003 contacts →

Partial evidence

“M-TEC setzt sich seit 5 Jahrzehnten für die effiziente Nutzung erneuerbarer Energie ein.”

Source: RevenueBase Database · checked Sep 28, 2026
16Partial evidenceKirchschlag Bei Linz, AustriaHQ checked Sep 28, 202611-502 contacts →

Partial evidence

“Unsere Fachkompetenz umfasst die Haus- und Gebäudetechnik inklusive der Elektrotechnik und Energie- und Brandschutzkonzepte.”

Source: RevenueBase Database · checked Sep 28, 2026
17Partial evidenceDornbirn, AustriaHQ checked Sep 28, 20261-102 contacts →

Partial evidence

“Wir beschäftigen uns bereits seit über zwei Jahrzehnten mit der energieoptimierten Gebäude- und Haustechnikplanung.”

Source: RevenueBase Database · checked Sep 28, 2026
18Partial evidenceLudmannsdorf, AustriaHQ checked Sep 28, 20261-102 contacts →

Partial evidence

“Our company is specialized in the field of industrial energy systems.”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceTillmitsch, AustriaHQ checked Sep 28, 20261-101 contacts →

Indirect evidence

“Die GEM Solutions GmbH wurde im Jahr 2021 gegründet und bietet sowohl Industrie- & Gewerbekunden als auch kommunalen und landwirtschaftlichen Betrieben und Gemeinden umfangreiche…”

Source: RevenueBase Database · checked Sep 28, 2026
20Strong evidenceWildermieming, AustriaHQ checked Sep 28, 20261-101 contacts →

Strong evidence

“ENERGY CONSULTING CONCEPT CONTROLLING CONSUMPTION CONNECT Wir von ENCON stehen zu unserem Wort.”

Source: RevenueBase Database · checked Sep 28, 2026
21Strong evidenceVienna, AustriaHQ checked Sep 28, 20261-101 contacts →

Strong evidence

“Consulting for: Energy, Material and Resource Efficiency.”

Source: RevenueBase Database · checked Sep 28, 2026
22Strong evidenceWien, AustriaHQ checked Sep 28, 20261-101 contacts →

Strong evidence

“Consulting, planning of sustainable building technology in the field of heating, ventilation, air conditioning, sanitation, solar and renewable Energy, energy certificate…”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 22 of 53 energy auditing and consulting firms based in Austria

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Energy auditing and consulting firms based in Austria at a glance

As of Sep 28, 2026
48.2%Verified-email coverage
4.8Average contacts per company
1-10Median size (employees)
15.1%Largest-city concentration · Wien
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
37
11-50
13
51-200
2
1,001-5,000
1

Email recency for this list is measured worldwide rather than for Austria, so it is reported there. Company counts and contact totals on this page are exact for Austria, over 53 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 auditing and consulting 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 Austria whose own description of what they do matches “energy auditing and consulting 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 energy auditing and consulting 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 energy auditing and consulting firms, and records with no verified work email. Companies headquartered outside Austria 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, 123 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 28, 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 auditing and consulting 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 energy auditing and consulting firms are there based in Austria?

RevenueBase identified 53 energy auditing and consulting firms headquartered in Austria 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?

CES Clean Energy Solutions, headquartered in Vienna, tops this list with the largest team on record.

Which city has the most energy auditing and consulting firms?

Wien leads with 8 headquartered companies, followed by Vienna (4) and Graz (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 123 verified decision-maker contacts tracked across these 53 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 28, 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.