Company lists · Data refreshed September 2026
Top 25 Ground source heat pump companies based in Germany
RevenueBase identified 373 ground source heat pump companies headquartered in Germany as of September 2026 and tracks 1,936 professional contacts across them, including 438 with verified work emails. Berlin is the largest hub.
This list covers ground source heat pump companies headquartered in Germany, 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 19, 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.
The 25 largest ground source heat pump companies based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 136 contacts → | ||||
Indirect evidence “Enter ist ein bundesweit tätiger Anbieter von Wärmepumpen, Solaranlagen (Photovoltaik) mit Stromspeicher, Wallboxen und Energiemanagement-Systemen für Eigenheimbesitzer in…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 86 contacts → | ||||
Strong evidence “Heat pumps are part of our DNA 🧬 Our vision is an ideal tomorrow - independent of fossil energy sources You too can become part of ait Since 1998, we have been helping to protect…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 84 contacts → | ||||
Indirect evidence “Wir bei Vamo haben es uns zur Mission gemacht grünes, günstiges Heizen mit Wärmepumpen unkompliziert und für jedermann möglich sowie bezahlbar zu machen.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 37 contacts → | ||||
Indirect evidence “The Envola System is an innovative, holistic and most sustainable approach to enable smart and efficient HVAC solutions for buildings.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 37 contacts → | ||||
Indirect evidence “heimWatt hat Ende Januar 2025 u.a.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 32 contacts → | ||||
Indirect evidence “Die WATERKOTTE GmbH ist mit über 50 Jahren Erfahrung als Hersteller nachhaltiger Energiesysteme auf Basis der Wärmepumpe ein Pionier der Branche.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 22 contacts → | ||||
Indirect evidence “CALOR ENERGY is a Germany-wide partner for integrated and economically viable energy solutions across residential real estate, commercial properties, and private investment…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 20 contacts → | ||||
Indirect evidence “Mittelständisches, solides Unternehmen für sichere und klimaschonende Energieversorgung - immer auf der Suche nach engagierten Kolleginnen und Kollegen!” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 20 contacts → | ||||
Indirect evidence “Die goodmen energy GmbH hat sich auf die Planung und Realisation von Wärme- und Kälte-Versorgung aus regenerativen Quellen spezialisiert.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 19 contacts → | ||||
Indirect evidence “eine Gesellschaft der ENGIE-Gruppe, ist ein führendes Unternehmen für Wärme- und Kältelösungen im Bereich der Oberflächennahen Geothermie.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 18 contacts → | ||||
Indirect evidence “nuuEnergy unterstützt Sie dabei, Ihre Heiztechnik klimafreundlich und zukunftssicher zu machen – mit moderner Wärmepumpentechnologie.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 17 contacts → | ||||
Indirect evidence “Muss klimafreundliches Heizen kompliziert sein?” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 15 contacts → | ||||
Indirect evidence “Natelberg Gebäudetechnik GmbH is a computer networking company based out of 9 Schwarzmoorstraße, Rhauderfehn, Germany.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 14 contacts → | ||||
Indirect evidence “Sie suchen nachhaltige Lösungen zum Heizen, Kühlen, Lüften, zur Warmwasserbereitung oder Wärmerückgewinnung für Ihr Wohngebäude oder Ihre Gewerbeimmobilie?” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 14 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 11 contacts → | ||||
Indirect evidence “Mit dekarbo° unterstützen wir Wohnungsunternehmen bei der Dekarbonisierung ihres Gebäudebestands mit einfachen, schnellen und effizienten Wärmepumpenlösungen.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 11 contacts → | ||||
Indirect evidence “Dein lokaler Partner für moderne Energielösungen - Wärmepumpen, PV und alles was dazugehört neotherm ist ein schnell wachsendes Unternehmen im Bereich der erneuerbaren Energien…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 10 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 10 contacts → | ||||
Indirect evidence “Die caldoa GmbH bietet effiziente Energie-/Eisspeicher- und Wärmepumpengesamtlösungen an, um maximalen Komfort bei minimalen Betriebskosten und nahezu ohne Treibhausgas-Emissionen…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 9 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 9 contacts → | ||||
Indirect evidence “Heizung - Klima - Sanitär” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 8 contacts → | ||||
Indirect evidence “GIEDORF ist regionaler Meisterbetrieb und Fullservice-Anbieter für Wärmepumpen, Photovoltaiklösungen, Stromspeicher, Klimaanlagen und Energie-Management-Systeme – für Eigenheime…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 7 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 7 contacts → | ||||
Indirect evidence “Wir sind der Partner für Photovoltaik, Wärmepumpen, Klimaanlagen und mehr – mit persönlicher Beratung, durchdachter Planung und zuverlässiger Umsetzung.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 7 contacts → | ||||
Indirect evidence “Klimatechnik Wagner GmbH is a company based out of 8 Daimlerstraße, Neusäß, Germany.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: ground source heat pump companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names ground source heat pump companies.
- Partial evidence
- Its own public description names part of ground source heat pump companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name ground source heat pump companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 373 ground source heat pump companies based in Germany
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 438 reachable decision-makers.
Free signup · no credit card
Ground source heat pump companies based in Germany at a glance
As of Sep 19, 2026Companies by employee count
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 373 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 ground source heat pump companies, 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 Germany whose own description of what they do matches “ground source heat pump companies”. 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 ground source heat pump companies), 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 ground source heat pump companies, and records with no verified work email. Companies headquartered outside Germany 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, 438 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 19, 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 ground source heat pump companies, 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 ground source heat pump companies are there based in Germany?
RevenueBase identified 373 ground source heat pump companies headquartered in Germany 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?
ENTER, headquartered in Berlin, tops this list with the largest team on record.
Which city has the most ground source heat pump companies?
Berlin leads with 23 headquartered companies, followed by Hamburg (9) and Dusseldorf (4).
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 438 verified decision-maker contacts tracked across these 373 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 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 373 ground source heat pump companies based in Germany. Start with a free account, no credit card.
Download this list →Related lists
Ground source heat pump companies by geography
- Ground source heat pump companies based in Australia
- Ground source heat pump companies based in Austria
- Ground source heat pump companies based in Belgium
- Ground source heat pump companies based in Canada
- Ground source heat pump companies based in Denmark
- Ground source heat pump companies based in Finland
- Ground source heat pump companies based in France
- Ground source heat pump companies based in Ireland
- Ground source heat pump companies based in Italy
- Ground source heat pump companies based in the Netherlands
- Ground source heat pump companies based in New Zealand
- Ground source heat pump companies based in Poland
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Ground source heat pump companies based in Australia
- Ground source heat pump companies based in Austria
- Ground source heat pump companies based in Belgium
- Ground source heat pump companies based in Canada
- Ground source heat pump companies based in Denmark
- Ground source heat pump companies based in Finland