Company lists · Data refreshed September 2026

Top 16 Residential energy efficiency companies based in Austria

Name: Residential energy efficiency companies based in Austria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 39 companies tracked

RevenueBase identified 39 company matches for residential energy efficiency companies associated with Austria as of September 2026 and tracks 301 professional contacts across them, including 134 with verified work emails. Vienna is the largest hub.

This list covers company matches for residential energy efficiency companies associated with Austria, 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 September 17, 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 Sep 17, 2026 How this list was built

39Companies

301Contacts tracked

134Verified emails

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The 16 largest residential energy efficiency companies based in Austria

Ranked by team size

Top 16 of 39 company matches for residential energy efficiency companies based in Austria, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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	Vaillant Österreich	Exact match	Vienna, AustriaHQ recorded Sep 17, 2026	201-500	87 contacts →
	Exact match “Vaillant Österreich bietet #energiesparende und #umweltschonende Systeme für #Heizen,#Kühlen und #Warmwasser.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Heizma	Exact match	Vienna, AustriaHQ recorded Sep 17, 2026	51-200	39 contacts →
	Exact match “We’re building Austria’s fastest-growing clean energy company, combining technology, process excellence, and hands-on execution to make renewable heating and solar power radically…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	EET	Exact match	Graz, AustriaHQ recorded Sep 17, 2026	11-50	38 contacts →
	Exact match “At EET, we are dedicated to advancing the clean energy transition through technology that makes modern residential energy systems simpler, smarter, and more accessible.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	E7 Energy Innovation & Engineering	Exact match	Vienna, AustriaHQ recorded Sep 17, 2026	11-50	20 contacts →
	Exact match “e7 is a private research and consulting company specialized in the energy efficiency and the renewable energy sector.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Ifea Institut FÜR Energieausweis Gmbh	Exact match	Linz, AustriaHQ recorded Sep 17, 2026	11-50	14 contacts →
	Exact match “IfEA - Institut für Energieausweis GmbH is a real estate company based out of Böhmerwaldstraße 3, Linz, Austria.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	PWE System Gmbh	Exact match	Wels, AustriaHQ recorded Sep 17, 2026	1-10	11 contacts →
	Exact match “PWE System GmbH is a company based out of Franz-zola-straße 5, Wels, Oberösterreich, Austria.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Synecotec	Exact match	Absam, AustriaHQ recorded Sep 17, 2026	11-50	11 contacts →
	Exact match “We are an Energy Service Company (ESCO) from Tyrol that has set itself the task of realising clean and sustainable solutions for the energy use of companies and private households.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Conversio Energie Gmbh	Exact match	Spittal An Der Drau, AustriaHQ recorded Sep 17, 2026	201-500	11 contacts →
	Exact match “Conversio Energie GmbH is a chemicals company based out of Koschatstraße 24, Spittal an der Drau, Austria.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Energiefreund	Exact match	Landeck, AustriaHQ recorded Sep 17, 2026	51-200	7 contacts →
	Exact match “Innovativ und nachhaltig: Wir vereinen intelligente Energiesysteme unter Ihrem Dach.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Pvplus Gmbh	Exact match	Klosterneuburg, AustriaHQ recorded Sep 17, 2026	11-50	6 contacts →
	Exact match “Transforming the world to net zero requires clean energy from local production.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Green Electrics Licht & Energietechnik Gmbh	Exact match	Gleisdorf, AustriaHQ recorded Sep 17, 2026	51-200	5 contacts →
	Exact match “Green Electrics unterstützt Sie als Komplettanbieter zuverlässig mit innovativen Lösungen in allen energiewirtschaftlichen Belangen zum Thema Licht, Photovoltaik, Smart Home und…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Thermolink	Exact match	Neckenmarkt, AustriaHQ recorded Sep 17, 2026	1-10	4 contacts →
	Exact match “Ingenieurbüro für: thermische Energietechnik & industrielle Energieeffizienz” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	M-Tec Energie.Innovativ Gmbh	Exact match	Arnreit, AustriaHQ recorded Sep 17, 2026	51-200	3 contacts →
	Exact match “M-TEC setzt sich seit 5 Jahrzehnten für die effiziente Nutzung erneuerbarer Energie ein.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Lüftung Schmid Gmbh	Exact match	Rohrendorf Bei Krems, AustriaHQ recorded Sep 17, 2026	11-50	2 contacts →
	Exact match “Ihr verlässlicher Partner in allen Fragen der energieeffizienten Haustechnik!” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Ecoroom Elektrotechnik E. U	Exact match	Wattens, AustriaHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match “Willkommen bei ecoroom Elektrotechnik!” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Solmind Flexco	Exact match	Vienna, AustriaHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match “Als Cleantech-Unternehmen stellen wir uns der Herausforderung, einen der größten CO₂ Emittenten unserer Zeit anzugehen: Gebäude.” Recorded in the RevenueBase company graph · Sep 17, 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 “residential energy efficiency 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 16 of 39 residential energy efficiency companies based in Austria

See the full list, filter by size, metro and specialty, and access 134 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Residential energy efficiency companies based in Austria at a glance

As of Sep 17, 2026

44.5%Verified-email coverage

7.7Average contacts per company

1-10Median size (employees)

15.4%Largest-city concentration · Vienna

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 39 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 Austria whose business descriptions match “residential energy efficiency 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 134 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 September 17, 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 “residential energy efficiency companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many residential energy efficiency companies are there based in Austria?

RevenueBase identified 39 company matches for residential energy efficiency companies associated with Austria as of September 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?

Vaillant Österreich tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most residential energy efficiency companies?

Vienna leads with 6 company records, followed by Arnreit (2) and Graz (2).

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 134 professional contacts with verified work emails tracked across these 39 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 September 17, 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.