Company lists · Data refreshed October 2026

Top 25 Commercial energy efficiency startups based in Germany

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

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 354 companies tracked

RevenueBase identified 354 company matches for commercial energy efficiency startups associated with Germany as of October 2026 and tracks 5,662 professional contacts across them, including 2,172 with verified work emails. Berlin is the largest hub.

This list covers company matches for commercial energy efficiency startups 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 October 10, 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 Oct 10, 2026 How this list was built

354Companies

5,662Contacts tracked

2,172Verified emails

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The 25 largest commercial energy efficiency startups based in Germany

Ranked by team size

Top 25 of 354 company matches for commercial energy efficiency startups based in Germany, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 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	ISTA	Exact match	Essen, GermanyHQ recorded Oct 10, 2026	5,001-10,000	1,503 contacts →
	Exact match “Wir geben Häusern eine Zukunft.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	Kieback&peter	Exact match	Berlin, GermanyHQ recorded Oct 10, 2026	1,001-5,000	560 contacts →
	Exact match “Our DNA are sustainable buildings As a Smart Building Solutioneer, we combine intelligent building technologies, data-based services, sustainable excellence and multiple synergy…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3	Kalorimeta Gmbh	Exact match	Hamburg, GermanyHQ recorded Oct 10, 2026	501-1,000	196 contacts →
	Exact match “Wir sind Ihr Partner für die smarte Energiewende in der Wohnimmobilie.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	Paul Tech AG	Exact match	Mannheim, GermanyHQ recorded Oct 10, 2026	51-200	148 contacts →
	Exact match “Die PAUL Tech AG mit Sitz in Mannheim macht Bestandsimmobilien grün und werthaltig.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	Apleona Wolfferts Gmbh	Exact match	Cologne, GermanyHQ recorded Oct 10, 2026	1,001-5,000	115 contacts →
	Exact match “Wir verbinden Anlagentechnik und maßgeschneiderte Services, um die Energie unserer Kunden optimal einzusetzen - und das seit über 120 Jahren.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6	Green Fusion	Exact match	Berlin, GermanyHQ recorded Oct 10, 2026	51-200	101 contacts →
	Exact match “The energy-saving pilot for all boiler rooms.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7	Greenflash	Exact match	Essen, GermanyHQ recorded Oct 10, 2026	51-200	88 contacts →
	Exact match “Wir als End-to-End Partner denken Energie ganzheitlich, wie kein anderer: Wir realisieren die Energieversorgung unserer Kunden als integriertes Gesamtsystem und übernehmen dabei…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	Enloc AG	Exact match	Dresden, GermanyHQ recorded Oct 10, 2026	51-200	79 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 · Oct 10, 2026 · View company records in RevenueBase
9	Meteoviva	Exact match	52064 Aachen, GermanyHQ recorded Oct 10, 2026	51-200	77 contacts →
	Exact match “With about 14 million hours of operation, meteoviva is the leading provider for AI-based solutions for optimised building operations worldwide - and ISO 27001 certified.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	Deos AG	Exact match	Rheine, GermanyHQ recorded Oct 10, 2026	51-200	76 contacts →
	Exact match “As a technology leader in building automation, DEOS AG has been developing and producing innovative building automation and energy management systems “Made in Germany” with secure…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11	Oni-Wärmetrafo Gmbh	Exact match	Lindlar, GermanyHQ recorded Oct 10, 2026	201-500	72 contacts →
	Exact match “Seit über vier Jahrzehnten setzen Kunden auf innovative Energiespartechnik aus dem Hause ONI.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12	Limón Gmbh	Exact match	Kassel, GermanyHQ recorded Oct 10, 2026	51-200	58 contacts →
	Exact match “Limón ist Ihr Dienstleister und Lösungsanbieter für Energieeffizienz in der Industrie.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13	Hörburger Gmbh	Exact match	Waltenhofen, GermanyHQ recorded Oct 10, 2026	201-500	54 contacts →
	Exact match “Hörburger GmbH is an information technology and services company based out of Gewerbestrasse 5, Waltenhofen, Bavaria, Germany.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	E-Con	Exact match	Memmingen, GermanyHQ recorded Oct 10, 2026	51-200	54 contacts →
	Exact match “e-con AG Die e-con AG ist seit 20 Jahren im Einsatz für erneuerbare Energien und versteht sich als Partner für die Energiewende.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15	Betterspace Gmbh	Exact match	Ilmenau, GermanyHQ recorded Oct 10, 2026	51-200	44 contacts →
	Exact match “Betterspace develops smart software solutions that make your day-to-day work easier.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16	Recogizer	Exact match	Bonn, GermanyHQ recorded Oct 10, 2026	51-200	41 contacts →
	Exact match “Recogizer unterstützt Bestandshalter, Eigentümer und Dienstleister dabei, die Nachhaltigkeit von Gewerbeimmobilien messbar zu steigern.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	KSV Koblenzer Steuerungs- UND Verteilungsbau Gmbh	Exact match	Koblenz, GermanyHQ recorded Oct 10, 2026	51-200	41 contacts →
	Exact match “Die KSV Koblenzer Steuerungs- und Verteilungsbau GmbH ist ihr kompetenter und zuverlässiger Ansprechpartner in allen Fragestellungen der Energie- und Anlagentechnik, Steuerungs-…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	Purpose Green	Exact match	Berlin, GermanyHQ recorded Oct 10, 2026	51-200	37 contacts →
	Exact match “End-to-end solution for energy retrofits and long-term ESG management.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19	Metr Building Management Systems Gmbh	Exact match	Berlin, GermanyHQ recorded Oct 10, 2026	11-50	35 contacts →
	Exact match “metr aims to accelerate the reduction of global CO2 emissions and make buildings more energy-efficient and sustainable.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20	Eneg Gmbh	Exact match	Hamburg, GermanyHQ recorded Oct 10, 2026	51-200	33 contacts →
	Exact match “eNeG – unser Name ist unser Auftrag, denn eNeG ist die Bezeichnung des Energieeinsparungsgesetzes, das Ende der siebziger Jahre für einen tiefgreifenden Wandel im Umgang mit den…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	Hosch Gebäudeautomation	Exact match	Teltow, GermanyHQ recorded Oct 10, 2026	51-200	33 contacts →
	Exact match “HOSCH Gebäudeautomation wurde 2002 in Teltow gegründet und hat sich als fabrikatsunabhängiger Systemintegrator mit Niederlassungen in Nürnberg, Hamburg und Düsseldorf in…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22	Effizienzpioniere	Exact match	Stuttgart, GermanyHQ recorded Oct 10, 2026	51-200	32 contacts →
	Exact match “Energy-efficient building renovations are complex.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23	KBR Gmbh	Exact match	Schwabach, GermanyHQ recorded Oct 10, 2026	51-200	30 contacts →
	Exact match “Wir sind KBR – Ihr Partner für smartes Energiemanagement!” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	Kühn Elektrotechnik Gmbh	Exact match	Karlsruhe, GermanyHQ recorded Oct 10, 2026	51-200	29 contacts →
	Exact match “Energieeffizienzmaßnahmen sind nicht immer mit hohen Investitionen verbunden.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25	ENIT	Exact match	Freiburg, GermanyHQ recorded Oct 10, 2026	11-50	29 contacts →
	Exact match “We are Enit.” Recorded in the RevenueBase company graph · Oct 10, 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 “commercial energy efficiency startups”. 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 354 commercial energy efficiency startups based in Germany

See the full list, filter by size, metro and specialty, and access 2,172 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial energy efficiency startups based in Germany at a glance

As of Oct 10, 2026

38.4%Verified-email coverage

16.0Average contacts per company

1-10Median size (employees)

9.0%Largest-city concentration · Berlin

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

178

11-50

110

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 354 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 “commercial energy efficiency startups” 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 2,172 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 October 10, 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.

Commercial energy efficiency startups by metro

Commercial energy efficiency startups in Berlin32

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 “commercial energy efficiency startups”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial energy efficiency startups are there based in Germany?

RevenueBase identified 354 company matches for commercial energy efficiency startups associated with Germany as of October 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?

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

Which city has the most commercial energy efficiency startups?

Berlin leads with 32 company records, followed by Hamburg (15) and Munich (15).

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 2,172 professional contacts with verified work emails tracked across these 354 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 October 10, 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.