Company lists · Data refreshed September 2026

Top 20 Energy compliance consulting firms based in Austria

RevenueBase identified 51 energy compliance consulting firms headquartered in Austria as of September 2026 and tracks 321 professional contacts across them, including 117 with verified work emails. Wien is the largest hub.

This list covers energy compliance 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
51Companies
321Contacts tracked
117Verified emails
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The 20 largest energy compliance consulting firms based in Austria

Ranked by team size
Top 20 of 51 energy compliance 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 compliance 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
2Strong 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
3Indirect evidenceFrohnleiten, AustriaHQ checked Sep 28, 202611-5016 contacts →

Indirect evidence

“Abfallverwertung, Schadstoffreduktion, Emissionsvorgaben … – Betriebe werden heute mit einer Vielzahl an umweltgesetzlichen Verpflichtungen konfrontiert.”

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 evidenceGmunden, AustriaHQ checked Sep 28, 202611-5015 contacts →

Partial evidence

“Als produktunabhängige Komplett-Anbieterin bieten wir unseren Kundinnen seit 1995 innovative und nachhaltige Gesamtlösungen in den Bereichen Energie, Umwelt und Ressourcenschonung.”

Source: RevenueBase Database · checked Sep 28, 2026
6Partial 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
7Partial 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
8Indirect evidenceVienna, AustriaHQ checked Sep 28, 20261-108 contacts →

Indirect evidence

“Mit susform wird Nachhaltigkeit auf den Punkt gebracht.”

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceVienna, AustriaHQ checked Sep 28, 20261-108 contacts →

Indirect evidence

“Nachhaltigkeit liegt in der DNA von ECOFIDES.”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceWartberg Ob Der Aist, AustriaHQ checked Sep 28, 20261-106 contacts →

Indirect evidence

“Strategische Nachhaltigkeitsberatung für Unternehmen mit Weitblick.”

Source: RevenueBase Database · checked Sep 28, 2026
11Partial 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
12Partial evidenceWien, AustriaHQ checked Sep 28, 20261-105 contacts →

Partial evidence

“Daxner & Merl stands for profound sustainability consulting services focused on environmental management.”

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

Indirect evidence

“Klimaschutz im Hochbau braucht Aktionen.”

Source: RevenueBase Database · checked Sep 28, 2026
14Partial 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
15Partial evidenceNeckenmarkt, AustriaHQ checked Sep 28, 20261-104 contacts →

Partial evidence

“Ingenieurbüro für: thermische Energietechnik & industrielle Energieeffizienz”

Source: RevenueBase Database · checked Sep 28, 2026
16Partial 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
17Strong 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
18Strong evidenceVienna, AustriaHQ checked Sep 28, 20261-101 contacts →

Strong evidence

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

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

Indirect evidence

“Als Unternehmensberatung für Nachhaltigkeit unterstützen wir Sie zu den Themen CSRD Berichterstattung / Gebäudezertifizierung / EU-Taxonomie.”

Source: RevenueBase Database · checked Sep 28, 2026
20Strong 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 20 of 51 energy compliance consulting firms based in Austria

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Energy compliance consulting firms based in Austria at a glance

As of Sep 28, 2026
36.4%Verified-email coverage
6.3Average contacts per company
1-10Median size (employees)
19.6%Largest-city concentration · Wien
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
41
11-50
8
51-200
1
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 51 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 compliance 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 compliance 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 compliance 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 compliance 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, 117 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 compliance 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 compliance consulting firms are there based in Austria?

RevenueBase identified 51 energy compliance 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 compliance consulting firms?

Wien leads with 10 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 117 verified decision-maker contacts tracked across these 51 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.