Company lists · Data refreshed November 2026

Top 25 Geothermal heating system companies based in Germany

RevenueBase identified 446 company matches for geothermal heating system companies associated with Germany as of November 2026 and tracks 2,115 professional contacts across them, including 651 with verified work emails. Berlin is the largest hub.

This list covers company matches for geothermal heating system 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 November 6, 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 Nov 6, 2026 How this list was built
446Companies
2,115Contacts tracked
651Verified emails
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The 25 largest geothermal heating system companies based in Germany

Ranked by team size
Top 25 of 446 company matches for geothermal heating system companies based in Germany, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchWetzlar, GermanyHQ recorded Nov 6, 20261,001-5,000147 contacts →

Exact match

“Die Marke Buderus ist Teil der Bosch Thermotechnik GmbH und steht seit 1731 für Spitzenprodukte im Bereich Heizsysteme Ob regenerativ oder klassisch betrieben – unsere Heizsysteme…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchRastede, GermanyHQ recorded Nov 6, 2026201-500117 contacts →

Exact match

“BRÖTJE efficient heating system technology.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchElsterheide, GermanyHQ recorded Nov 6, 2026201-500106 contacts →

Exact match

“Mit innovativer Technik zur Übergabe und Verteilung von Wärme auf der entscheidenden „letzten Meile“ vereinfacht und beschleunigt PEWO die Integration regenerativer Energiequellen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchCologne, GermanyHQ recorded Nov 6, 202651-200104 contacts →

Exact match

“Wir bei Vamo haben es uns zur Mission gemacht grünes, günstiges Heizen mit Wärmepumpen unkompliziert und für jedermann möglich sowie bezahlbar zu machen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchRemagen, GermanyHQ recorded Nov 6, 2026201-50066 contacts →

Exact match

“For almost 20 years, ZEWOTHERM (abbreviated in German: future-oriented energy and heating systems) stands for holistic energy and heating systems for modern house and building…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchBad Wurzach, GermanyHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“BauGrund Süd Gesellschaft für Geothermie mbH is an utilities company based out of MAYBACHSTRASSE 5, Bad Wurzach, Germany.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchSaerbeck, GermanyHQ recorded Nov 6, 202651-20038 contacts →

Exact match

“Mit smarten Qualitätsprodukten, persönlichem Service und exakt passenden Lösungen bringen wir genau das richtige Maß an Wärme zu unseren Kunden.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchHerne, GermanyHQ recorded Nov 6, 202651-20034 contacts →

Exact match

“Die WATERKOTTE GmbH ist mit über 50 Jahren Erfahrung als Hersteller nachhaltiger Energiesysteme auf Basis der Wärmepumpe ein Pionier der Branche.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchKaufbeuren, GermanyHQ recorded Nov 6, 202651-20034 contacts →

Exact match

“varmeco ist seit 1983 Pionier für rationelle und regenerative Heizungssystemtechnik mit hygienischer Trinkwarmwasserbereitung.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchCologne, GermanyHQ recorded Nov 6, 202651-20034 contacts →

Exact match

“heimWatt hat Ende Januar 2025 u.a.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchHilpoltstein, GermanyHQ recorded Nov 6, 202651-20031 contacts →

Exact match

“ENERPIPE GmbH steht für innovative, energiesparende Wärmesysteme, die für die Energiewende viele Vorteile bieten.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchAscheberg, GermanyHQ recorded Nov 6, 202651-20031 contacts →

Exact match

“Die Daldrup & Söhne AG ist Spezialist für Bohrtechnik und die Erschließung geologischer Ressourcen in Deutschland mit Sitz in Ascheberg, Nordrhein-Westfalen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchPullach Im Isartal, GermanyHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“IEP Innovative Energie für Pullach GmbH is a geothermal and district heating operator based in Pullach im Isartal, Germany.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSchloß Holte-stukenbrock, GermanyHQ recorded Nov 6, 202651-20024 contacts →

Exact match

“Nachhaltige Wärmeversorgung Für die nachhaltige Wärmeversorgung entwickeln wir aus jahrzehntelanger Erfahrung, hochwertige und zuverlässige Produkte: Nah- und…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchKarlsruhe, GermanyHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Deutsche ErdWärme entwickelt, baut, finanziert und betreibt Erdwärmeanlagen zur Dekarbonisierung von Wärmenetzen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchFreiberg, GermanyHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“eine Gesellschaft der ENGIE-Gruppe, ist ein führendes Unternehmen für Wärme- und Kältelösungen im Bereich der Oberflächennahen Geothermie.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchRhauderfehn, GermanyHQ recorded Nov 6, 202651-20016 contacts →

Exact match

“Natelberg Gebäudetechnik steht seit über 40 Jahren für moderne, zuverlässige und ganzheitliche Lösungen rund um die Gebäudetechnik.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchKulmbach, GermanyHQ recorded Nov 6, 2026501-1,00015 contacts →

Exact match

“Sie suchen nachhaltige Lösungen zum Heizen, Kühlen, Lüften, zur Warmwasserbereitung oder Wärmerückgewinnung für Ihr Wohngebäude oder Ihre Gewerbeimmobilie?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSchwerin, GermanyHQ recorded Nov 6, 20261-1013 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchMonheim, GermanyHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“Die Wärme mit Konzept GmbH bietet innovative und nachhaltige Heizlösungen, die nicht nur für Neubauten, sondern auch für Bestandsobjekte ideal sind – und das ohne große…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchEhingen-donau, GermanyHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“Energieeffiziente Warmwasser-Systeme”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchGrünwald, GermanyHQ recorded Nov 6, 202611-5012 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchAhrensburg, GermanyHQ recorded Nov 6, 202651-20011 contacts →

Exact match

“Energielösungen und Heizsysteme von Matari: Für Ihre Zukunft Unsere Mission ist es, die Häuser und Hallen in unserer Region mit grüner, günstiger Energie und Wärme zu versorgen…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchUnterhaching, GermanyHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“Unterhachings sichere und umweltfreundliche Wärmeversorgung für Generationen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchSchramberg, GermanyHQ recorded Nov 6, 202651-2009 contacts →

Exact match

“Heizung - Klima - Sanitär”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 446 geothermal heating system companies based in Germany

See the full list, filter by size, metro and specialty, and access 651 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal heating system companies based in Germany at a glance

As of Nov 6, 2026
30.8%Verified-email coverage
4.7Average contacts per company
1-10Median size (employees)
2.7%Largest-city concentration · Berlin
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
216
11-50
107
51-200
41
201-500
6
501-1,000
1
1,001-5,000
1

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 446 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 “geothermal heating system 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 651 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 November 6, 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 “geothermal heating system companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal heating system companies are there based in Germany?

RevenueBase identified 446 company matches for geothermal heating system companies associated with Germany as of November 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?

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

Which city has the most geothermal heating system companies?

Berlin leads with 12 company records, followed by Hamburg (7) and Munich (6).

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 651 professional contacts with verified work emails tracked across these 446 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 November 6, 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.