Best Energy Efficiency Companies in Germany
The 153 best Energy Efficiency companies in Germany in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Efficient Energy.
Germany's Energy Efficiency sector has 153 companies on our radar, collectively disclosing $66M in funding, and not a single unicorn in sight. Efficient Energy leads the pack at $14M raised, with Vamo at $11M and Ledvance pulling $8M. That's a tightly bunched field, and the question worth asking is: where does the next breakout come from? Stadtwerke Cottbus ($7M) and Eco2grow ($4M) round out the upper tier, backed by a mix of public and private capital including Europa, BAFA, and Beyond Capital Partners. No one's running away with this market yet.
What I find telling is the digital momentum underneath the funding numbers. Across 138 energy apps tracked, median install growth is running at roughly +28% YoY, a signal that you can't ignore even in a hardware-heavy sector. Hot themes driving that engagement include solar PV, EV battery technology, and EV energy management systems. Germany's regulatory environment, shaped partly by EU efficiency mandates, keeps pressure on businesses to deploy real solutions fast. So the funding pool is modest, but the directional pull is clear.
Our analysis of 50 Energy Efficiency companies
$1.3b in tracked funding; 52% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2011.
Ranked: Best Energy Efficiency companies in Germany
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Efficient Energy Water-based refrigeration technology developer for industrial cooling systems | $14M | 74 mo ago | Series B | Wolfgang Jacobi Co-Founder | 2006 | — | 302 patents Patents concentrated in mechanical & energy engineering | — |
| 2 | Vamo Provider of heat pump solutions for heating 27Talent top 28%Tech top 48%Funding bottom 43%Global bottom 37% All 6 signals ▾Talenttop 28% Techtop 48% Fundingbottom 43% Globalbottom 37% Marketbottom 28% Newsbottom 18% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Tech: 21 technologies across 5/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 27/100 | $11M | 19 mo ago | Seed | Falk Hantl Co-Founder & Managing Director | 2022 | WebflowApple iCloud MailGoogle Workspace+18 | — | 1 job opening |
| 3 | O-Flexx Technologies Developers of thermoelectric generators | $9M | 193 mo ago | Acquired | — | 2006 | — | 109 patents Advanced thermoelectric material deposition and module manufacturing for waste‑heat energy conversion. | — |
| 4 | LEDVANCE Provider of LED lighting, smart home solutions, and renewable energy systems | $8M | 39 mo ago | Acquired | — | 2016 | Shogun Page BuilderPimcoreShopify+45 | 648 patents Patents concentrated in mechanical & energy engineering | — |
| 5 | Stadtwerke Cottbus Provider of electricity, gas, and heating services. It offers a customer portal for managing accounts and… | $7M | 39 mo ago | Funding Raised | Vlatko Knezevic CEO | 1990 | Apple iCloud MailPHPVideoJS+7 | — | — |
| 6 | InvenSor Provider of electrical installation and repair services | $6M | 180 mo ago | Deadpooled | Niels Braunschweig Co-CEO | 2006 | — | 81 patents Vacuum‑based adsorption refrigeration systems for gas removal and working‑fluid recovery | — |
| 7 | ECO2GROW Provider of electricity contracts for the construction of new wind and solar farms 14Talent top 28%Funding top 49%Global bottom 37%Market bottom 10% All 4 signals ▾Talenttop 28% Fundingtop 49% Globalbottom 37% Marketbottom 10% Talent: 4 named leaders on record · 4 C-suite/founder profiles curated Funding: Raised $4.4M across 1 rounds · 1 rounds over 2 yrs (0.5/yr) rank vs industry peers · Fliar Intelligence Index 14/100 | $4M | 23 mo ago | Seed | Konrad Ciezarek Co-Founder | 2021 | — | — | — |
| 8 | Ontopx Manufacturer of high-quality LED lighting solutions for industrial clients | $3M | 178 mo ago | Series A | — | 2003 | — | — | — |
| 9 | DUSCHKRAFT Manufacturer of bathroom dehumidifiers preventing mold. | $2M | 61 mo ago | Series A | Arvid Reinwaldt Co-Founder | 2017 | Cart FunctionalityShopifySentry+33 | 6 patents Patents concentrated in health & consumer products | — |
| 10 | va-Q-Tec Manufacturer of thermal packaging systems and vacuum insulation panels | $1M | 101 mo ago | Acquired | — | 2001 | WordPressMySQLPHP+18 | 273 patents Patents concentrated in mechanical & energy engineering | — |
| 11 | Jenoptik Provider of products and services for photonics market 62Innovation top 23%Product top 29%Global top 33%Market top 40% All 9 signals ▾Innovationtop 23% Producttop 29% Globaltop 33% Markettop 40% Talenttop 41% Newstop 45% Growthbottom 47% Fundingbottom 45% Techbottom 44% Innovation: 5 product lines · Deep-tech classification: Tech Hardware Product: 0 product launch events in 12 mo · 5 distinct product lines rank vs industry peers · Fliar Intelligence Index 62/100 | $689K | 132 mo ago | Public | Franziska Kindervater Executive Assistant to the President & CEO | 1991 | SitecoreApple iCloud MailBootstrap+12 | — | — |
| 12 | VOLZ Luftfilter Manufacturer of air filtration media and filter products for air conditioning, ventilation, painting, drying… | $647K | 79 mo ago | Funding Raised | — | 2005 | ZURB FoundationNginxCloudflare+13 | — | — |
| 13 | Enerpipe Provider of district heating network planning and implementation services | $410K | 113 mo ago | Public | Andreas Fiegl Managing Director | 2007 | TYPO3 CMSApple iCloud MailMicrosoft 365+13 | 20 patents Patents concentrated in mechanical & energy engineering | 1 job opening |
| 14 | Mitsubishielectric Manufacturer of diverse electrical and electronic products, systems, and solutions | — | 40 mo ago | Public | Kei Uruma CEO | 1921 | Adobe Experience ManagerJavaVideoJS+16 | — | 4 partnerships · 1 award |
Top 12 Energy Efficiency companies in Germany
#1
Seed · Hildesheim, Lower Saxony · founded 2022$10.7Mraised▾
Provider of heat pump solutions for heating. It provides environmentally friendly heating solutions using heat from the environment.
- Oct 2024Seed$7.6M
- Sep 2023Seed$3.2M
#2
Seed · Bonn, North Rhine Westphalia · founded 2021 · 3 employees$4.4Mraised▾
Provider of electricity contracts for the construction of new wind and solar farms
- Jul 2024Seed$4.4M
#3
Acquired · Garching, Bavaria · founded 2016 · 2069 employees$7.7Mraised▾
Provider of LED lighting, smart home solutions, and renewable energy systems. The company manufactures and sells a wide variety of LED lighting products for professional and residential use, including luminaires, lamps, and LED strips. They also offer smart home technology integrating lighting control and energy management. Furthermore, they provide renewable energy solutions such as photovoltaic panels, inverters, and battery storage systems. The company's offerings encompass components, systems, and related services.
- Mar 2023Grant (prize money)$4.2M
- Jan 2023Grant (prize money)$3.5M
#4
Funding Raised · Cottbus, Brandenburg · founded 1990 · 50 employees$7Mraised▾
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- Mar 2023Grant (prize money)$7M
#5
Series B · Feldkirchen, Bavaria · founded 2006 · 100 employees$13.7Mraised▾
Efficient Energy is a developer of water-based refrigeration technology for industrial cooling systems. Based on a technology that builds on the direct evaporation, compression, condensation and relaxation of water or water vapor in a closed-loop cycle. Depending on the application, the process takes place in a vacuum at low pressures between 10 and 100 mbar and in the temperature range of 5 to 50 °C. Works in the 35 kW performance range that uses water (R718) as a refrigerant. Can be used in buildings, data centers and other heat removal demanding applications.
- Apr 2020Series B$13.7M
#6
Series A · Rostock, Mecklenburg Vorpommern · founded 2017 · 3 employees$2.3Mraised▾
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- May 2021Series A$1.2M
- Jul 2019Seed$1.1M
#7
Acquired · Duisburg, North Rhine Westphalia · founded 2006 · 11 employees$8.5Mraised▾
O-Flexx Technologies is a technology company that specializes in the field of thermoelectric generators. The O-Flexx technology allows users to harvest electrical energy from a great number of heat sources by exploiting differences in temperature. The company owns a broad portfolio of related patents in this field.
- May 2010Series A$8.5M
#8
Deadpooled · Seevetal, Lower Saxony · founded 2006 · 13 employees$5.7Mraised▾
Provider of electrical installation and repair services. They offer a full suite of services, including new construction, renovations, repairs, and the installation of lighting, home batteries, charging stations, and air conditioning systems. Expertise extends to domotics, security systems (alarms and video surveillance), and industrial electrical work. All installations adhere to safety regulations.
- 2011Series A$5.7M
#9
Series A · Hofheim, State of Hessen · founded 2003 · 6 employees$3.4Mraised▾
Manufacturer of high-quality LED lighting solutions for industrial clients. The company offers a range of products including LED tubes, spotlights, and industrial hall lighting. They provide comprehensive services, from initial consultation and planning to installation and ongoing support. A focus on efficient and effective lighting solutions is central to their business model, utilizing advanced LED technology to deliver superior light quality. The company also offers a product catalog showcasing their latest innovations.
- Aug 2011Series A$3.4M
#10
Acquired · Wurzburg, Bavaria · founded 2001 · 655 employees$1Mraised▾
Manufacturer of thermal packaging systems and vacuum insulation panels. It develops and distributes vacuum insulation panels for thermal insulation and temperature storage elements for temperature control. The company produces thermal packaging systems that maintain temperatures for food and pharmaceuticals during transport. It also optimizes energy balances for applications like buildings, water heaters, and appliances.
- Jan 2018Grant (prize money)$316.8K
- Jun 2017Grant (prize money)$178.8K
- Oct 2016Grant (prize money)$530.9K
- Nov 2011Series A—
#11
Funding Raised · Horb am Neckar, Baden Wurttemberg · founded 2005$647Kraised▾
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- Nov 2019Conventional Debt$647K
#12
Public · Jena, Thuringia · founded 1991 · 234 employees$689.4Kraised▾
Jenoptik is a provider of products and services for the photonics market. They are into Electric Power Supply and Drive Systems, Industrial Metrology, Cameras and Camera Modules, Laser and Laser Technology, LED lighting, Aviation Systems, Optics, and Optical Systems, Optoelectronics and Optoelectronic Systems, Defense and Security Technology, Traffic Safety Systems. They develop and construct industrial measuring technology that can be used to monitor and optimize production processes.
- Jun 2015Grant (prize money)$689.4K
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy Efficiency coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Energy Efficiency & Buildings is moving in Germany
A read on the academic research around Energy Efficiency & Buildings — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 951 Germany-affiliated papers.
- RWTH Aachen University98
- Karlsruhe Institute of Technology45
- Deutsches Zentrum für Luft- und Raumfahrt e. V.44
- Fraunhofer Institute for Solar Energy Systems44
- Technical University of Munich36
- Heat pump6→37
- Energy management11→22
- Mechanical engineering1→9
- Renewable energy6→13
- Radiative cooling1→7
- Heat pump51→150
- Renewable energy21→60
- Electricity12→38
- Renewable heat5→31
- Photovoltaic system6→30
- Heat pump8→25
- Renewable heat2→6
- Mechanical engineering1→4
- Environmental economics2→4
- Thermal energy storage3→4
Where energy efficiency is researched across Germany
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing energy efficiency patents in Germany
Germany energy efficiency patent filing is accelerating — 1,253 filings from 609 assignees (2016–2025), led by Robert Bosch, Stiebel Eltron & KG, Siemens; annual filings 107→196.
- Robert Bosch244
- Stiebel Eltron & KG174
- Siemens160
- BSH Hausgeraete158
- Vaillant148
- Efficient Energy140
- Viessmann Climate Solutions SE68
- Miele & CIE53
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.