Company lists · Data refreshed September 2026

Top 25 Residential energy efficiency companies based in Germany

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 511 companies tracked

RevenueBase identified 511 company matches for residential energy efficiency companies associated with Germany as of September 2026 and tracks 4,452 professional contacts across them, including 1,150 with verified work emails. Berlin is the largest hub.

This list covers company matches for residential energy efficiency companies associated with Germany, 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

511Companies

4,452Contacts tracked

1,150Verified emails

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The 25 largest residential energy efficiency companies based in Germany

Ranked by team size

Top 25 of 511 company matches for residential energy efficiency companies based in Germany, 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	Techem Energy Services Gmbh	Exact match	Eschborn, GermanyHQ recorded Sep 17, 2026	1,001-5,000	1,021 contacts →
	Exact match “Techem is a leading global energy service provider for the real estate sector and private homeowners.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Thermondo	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	1,001-5,000	412 contacts →
	Exact match “Gemeinsam machen wir Wohnen klimaneutral!” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	TADO	Exact match	Munich, GermanyHQ recorded Sep 17, 2026	51-200	162 contacts →
	Exact match “At tado° we believe that unnecessarily wasting energy should be a thing of the past.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Paul Tech AG	Exact match	Mannheim, GermanyHQ recorded Sep 17, 2026	51-200	155 contacts →
	Exact match “Die PAUL Tech AG mit Sitz in Mannheim macht Bestandsimmobilien grün und werthaltig.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	ENTER	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	51-200	136 contacts →
	Exact match “Enter ist ein bundesweit tätiger Anbieter von Wärmepumpen, Solaranlagen (Photovoltaik) mit Stromspeicher, Wallboxen und Energiemanagement-Systemen für Eigenheimbesitzer in…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Reonic	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	51-200	113 contacts →
	Exact match “Reonic enables renewable energy installers to sell, design and install systems better and faster than ever before.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Einhundert	Exact match	Cologne, GermanyHQ recorded Sep 17, 2026	51-200	87 contacts →
	Exact match “Your partner for the energy transition in the real estate industry Since 2017, einhundert Energie GmbH has been supporting real estate companies in electrifying and decarbonizing…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Enloc AG	Exact match	Dresden, GermanyHQ recorded Sep 17, 2026	51-200	80 contacts →
	Exact match “ENLOC – Energiedienstleister der Wohnungswirtschaft Die Enloc bietet innovative Lösungen unter Einbeziehung erneuerbarer Energien im Rahmen der Wärmelieferung/Contracting.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Metiundo Gmbh	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	51-200	56 contacts →
	Exact match “CO2 emissions in the real estate sector must be reduced quickly.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Purpose Green	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	51-200	53 contacts →
	Exact match “End-to-end solution for energy retrofits and long-term ESG management.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Co2online Ggmbh NON Profit	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	51-200	49 contacts →
	Exact match “Klimaschutz ist die größte Herausforderung unserer Zeit.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Eigensonne	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	201-500	49 contacts →
	Exact match “EIGENSONNE is the most convenient way to start producing your own solar energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Adler Solar Gmbh	Exact match	Bremen, GermanyHQ recorded Sep 17, 2026	51-200	39 contacts →
	Exact match “Die ADLER Solar GmbH aus Bremen plant, baut und installiert Energielösungen.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Wegatech	Exact match	Cologne, GermanyHQ recorded Sep 17, 2026	51-200	37 contacts →
	Exact match “heimWatt hat Ende Januar 2025 u.a.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Berliner Energieagentur Gmbh BEA	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	11-50	35 contacts →
	Exact match “Die Berliner Energieagentur GmbH (BEA) ist ein modernes Energiedienstleistungsunternehmen.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Pionierkraft	Exact match	Munich, GermanyHQ recorded Sep 17, 2026	11-50	31 contacts →
	Exact match “MIETERSTROM, neu gedacht Entdecken Sie mit PIONIERKRAFT die einfache & profitable Mieterstrom-Alternative für kleine Mehrfamilienhäuser.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Renewa Gmbh	Exact match	Hamburg, GermanyHQ recorded Sep 17, 2026	51-200	29 contacts →
	Exact match “RENEWA ist dein unabhängiger Partner für energetische Sanierung.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Kühn Elektrotechnik Gmbh	Exact match	Karlsruhe, GermanyHQ recorded Sep 17, 2026	51-200	29 contacts →
	Exact match “Energieeffizienzmaßnahmen sind nicht immer mit hohen Investitionen verbunden.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Deutsche Unternehmensinitiative Energieeffizienz E. V. Deneff	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	11-50	28 contacts →
	Exact match “Die Deutsche Unternehmensinitiative Energieeffizienz e.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Effizienzpioniere	Exact match	Stuttgart, GermanyHQ recorded Sep 17, 2026	51-200	27 contacts →
	Exact match “Energy-efficient building renovations are complex.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Calor Energy	Exact match	Hamburg, GermanyHQ recorded Sep 17, 2026	11-50	22 contacts →
	Exact match “CALOR ENERGY is a Germany-wide partner for integrated and economically viable energy solutions across residential real estate, commercial properties, and private investment…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	PERTO	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	11-50	19 contacts →
	Exact match “perto is an energy efficiency service provider for large properties.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Envidatec	Exact match	Hamburg, GermanyHQ recorded Sep 17, 2026	11-50	18 contacts →
	Exact match “Consulting businesses on Energy Efficiency and Renewable Energy UN Sustainable Development Goals and International Cooperation Envidatec offers consulting services on all things…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Ecowindow Gmbh	Exact match	Berlin, GermanyHQ recorded Sep 17, 2026	11-50	18 contacts →
	Exact match “We revolutionize energy-efficient window renovation through digitization and transparency” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	DER Solarteur	Exact match	Dortmund, GermanyHQ recorded Sep 17, 2026	51-200	17 contacts →
	Exact match “Der Solarteur bringt Solar auf Ihr Dach!” 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 25 of 511 residential energy efficiency companies based in Germany

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Residential energy efficiency companies based in Germany at a glance

As of Sep 17, 2026

25.8%Verified-email coverage

8.7Average contacts per company

1-10Median size (employees)

9.0%Largest-city concentration · Berlin

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

345

11-50

102

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 511 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 Germany 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 1,150 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 Germany?

RevenueBase identified 511 company matches for residential energy efficiency companies associated with Germany 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?

Techem Energy Services Gmbh 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?

Berlin leads with 46 company records, followed by Hamburg (24) and Munich (21).

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 1,150 professional contacts with verified work emails tracked across these 511 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.