Company lists · Data refreshed September 2026
Top 25 Building energy optimization companies based in Germany
RevenueBase identified 770 building energy optimization companies headquartered in Germany as of September 2026 and tracks 8,619 professional contacts across them, including 2,913 with verified work emails. Berlin is the largest hub.
This list covers building energy optimization 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 16, 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 building energy optimization companies based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,406 contacts → | ||||
Indirect evidence “Wir geben Häusern eine Zukunft.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,021 contacts → | ||||
Partial evidence “Techem is a leading global energy service provider for the real estate sector and private homeowners.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 580 contacts → | ||||
Partial evidence “Our DNA are sustainable buildings As a Smart Building Solutioneer, we combine intelligent building technologies, data-based services, sustainable excellence and multiple synergy…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 162 contacts → | ||||
Partial evidence “At tado° we believe that unnecessarily wasting energy should be a thing of the past.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 155 contacts → | ||||
Indirect evidence “Die PAUL Tech AG mit Sitz in Mannheim macht Bestandsimmobilien grün und werthaltig.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 132 contacts → | ||||
Partial evidence “Since 2017, ENVIRIA develops comprehensive, integrated energy solutions for commercial and industrial clients.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 128 contacts → | ||||
Indirect evidence “1967 gegründet, sind wir heute nicht nur eines der führenden deutschen Unternehmen im gebäudetechnischen Anlagenbau, sondern vor allem auch überzeugte Klimaschützer.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 120 contacts → | ||||
Partial evidence “Since we at APROVIS have been developing solutions that make energy more efficient, sustainable and reliable.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 100 contacts → | ||||
Partial evidence “Based in Cologne (Germany) with over 100 employees, we operate Germany’s leading software solution for optimizing building operations.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 92 contacts → | ||||
Partial evidence “MVV Enamic bietet als B2B-Lösungseinheit der MVV Energie AG Geschäftskunden ganzheitliche Energielösungen aus einer Hand.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 87 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 84 contacts → | ||||
Partial evidence “The energy-saving pilot for all boiler rooms.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 81 contacts → | ||||
Partial evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 81 contacts → | ||||
Partial evidence “Wir wollen, dass so viele Immobilien wie möglich energieeffizient saniert werden.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 81 contacts → | ||||
Partial evidence “Wir als End-to-End Partner denken Energie ganzheitlich, wie kein anderer: Wir realisieren die Energieversorgung unserer Kunden als integriertes Gesamtsystem und übernehmen dabei…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 81 contacts → | ||||
Strong evidence “Pure Energy is a private clean-tech organization focusing on commercial optimization of renewable & BESS assets, energy trading, origination, and "hands-on" advisory services.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 80 contacts → | ||||
Partial evidence “ENLOC – Energiedienstleister der Wohnungswirtschaft Die Enloc bietet innovative Lösungen unter Einbeziehung erneuerbarer Energien im Rahmen der Wärmelieferung/Contracting.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 80 contacts → | ||||
Partial evidence “ecoplanet ist die weltweite erste Software für integriertes Energiemanagement: Verbrauchssteuerung, intelligente Beschaffung und Regulatorik an einem Ort & KI-basiert optimiert.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 78 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 72 contacts → | ||||
Partial evidence “Seit über vier Jahrzehnten setzen Kunden auf innovative Energiespartechnik aus dem Hause ONI.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 56 contacts → | ||||
Indirect evidence “CO2 emissions in the real estate sector must be reduced quickly.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 54 contacts → | ||||
Partial evidence “Limón ist Ihr Dienstleister und Lösungsanbieter für Energieeffizienz in der Industrie.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 53 contacts → | ||||
Partial evidence “End-to-end solution for energy retrofits and long-term ESG management.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 52 contacts → | ||||
Indirect evidence “Wir sorgen für den optimalen Betrieb Ihrer Ladeinfrastruktur.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 51 contacts → | ||||
Partial evidence “Revolutionizing the energy market and promoting renewable energies as a tech company?” Source: RevenueBase Database · checked Sep 16, 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: building energy optimization 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 building energy optimization companies.
- Partial evidence
- Its own public description names part of building energy optimization companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name building energy optimization 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 770 building energy optimization companies based in Germany
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Building energy optimization companies based in Germany at a glance
As of Sep 16, 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 770 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 building energy optimization 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 “building energy optimization 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 building energy optimization 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 building energy optimization 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, 2,913 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 16, 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.
Building energy optimization companies by metro
- Building energy optimization companies in Berlin70
- Building energy optimization companies in Hamburg29
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 building energy optimization 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 building energy optimization companies are there based in Germany?
RevenueBase identified 770 building energy optimization 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?
ISTA, headquartered in Essen, tops this list with the largest team on record.
Which city has the most building energy optimization companies?
Berlin leads with 70 headquartered companies, followed by Hamburg (29) and Munchen (21).
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 2,913 verified decision-maker contacts tracked across these 770 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 16, 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 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.
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