Best Energy Efficiency Tech Companies in France
The 215 best Energy Efficiency Tech companies in France in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Aledia.
France's Energy Efficiency Tech sector is bigger than most funding headlines suggest, and this directory ranks 215 companies operating across it by disclosed equity funding and recent momentum. Total disclosed capital sits at $1.2B across the cohort. That's real money, concentrated fast.
Two names define the upper range. Aledia has pulled in $206M, Greenyellow $172M, and together they account for roughly a third of the entire pool. Metron trails at $46M, still a meaningful position for industrial energy intelligence. So what does that leave for everyone else? Mostly sub-$10M rounds, which tells you the field is still fragmented and early-stage outside the top tier. One unicorn has cleared the threshold. Bpifrance and Demeter anchor the investor side, with Europa and the EIC Fund adding institutional weight that signals regulatory tailwinds from Brussels filtering down into French deal flow. App-layer signals back the structural case: median install growth across energy-adjacent apps is running at roughly 28% year-over-year across 138 tracked titles, with ev battery technology and solar generation leading the theme clusters. I'd watch that convergence between hardware funding and software adoption closely. The scale is real, the consolidation isn't.
Our analysis of 50 Energy Efficiency Tech companies
$7.8b in tracked funding; 86% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy Efficiency Tech companies in France
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Aledia Provider of micro LED-based display systems 45Patents top 18%Innovation top 21%Moat top 26%Talent top 28% All 11 signals ▾Patentstop 18% Innovationtop 21% Moattop 26% Talenttop 28% Fundingtop 31% Marketbottom 49% Globalbottom 45% Techbottom 37% Growthbottom 35% Fin. healthbottom 23% Newsbottom 22% Patents: 1,360 patents matched (strict assignee match) · 608 filings since 2022 vs 595 in 2017-21 Innovation: 1,360 patents (top 1% of patent-holders) · 608 filings since 2022 vs 595 in 2017-21 rank vs industry peers · Fliar Intelligence Index 45/100 | $206M | 32 mo ago | 210 | Philippe Gilet CTO & CO-FOUNDER | WordPressApple iCloud MailMySQL+11 | Top 5M | 1,360 patents 3D micro‑LED optoelectronic devices and advanced light‑extraction manufacturing processes | 2 partnerships |
| 2 | Deepki SaaS-driven solutions for energy monitoring for buildings | $177M | 50 mo ago | 5 | Vincent Bryant Co-Founder & CEO | WordPressApple iCloud MailGoogle Workspace+18 | Top 5M | — | 1 award |
| 3 | GreenYellow 🦄 Provider of energy efficiency, solar energy production, storage, and electric mobility solutions | $172M | 1 mo ago | — | Otmane Hajji Founder | WordPress Site EditorElementorWordPress+25 | Top 5M | — | — |
| 4 | Accenta AI AI-based energy consumption management solutions | $121M | 33 mo ago | 152 | — | WordPressMySQLPHP+20 | Top 10M | 24 patents Low‑carbon building heating and cooling systems using thermal fluid regulation and geothermal sources | — |
| 5 | NewHeat Provides solar heat and waste heat recovery solutions | $56M | 30 mo ago | 39 | Pierre Delmas Co-Founder & Technical Director | WordPressMySQLPHP+15 | Top 10M | 5 patents Control and modulation of output power in solar‑thermal power plants | — |
| 6 | METRON Developer of energy management and optimization system for various sectors 50Funding top 27%Moat top 31%Growth top 35%Market bottom 49% All 7 signals ▾Fundingtop 27% Moattop 31% Growthtop 35% Marketbottom 49% Talentbottom 49% Globalbottom 39% Techbottom 37% Funding: Raised $46.4M across 5 rounds · 5 rounds over 8 yrs (0.6/yr) Moat: Editorial + unicorn rating 8/10 · Soonicorn rank vs industry peers · Fliar Intelligence Index 50/100 | $46M | 18 mo ago | 172 | Vincent Sciandra CEO | WordPressMySQLPHP+17 | Top 10M | — | 1 award |
| 7 | WeMaintain Provider of elevator maintenance services | $46M | 30 mo ago | 180 | Tristan Foureur Co-Founder & CTO | PrismicApple iCloud MailGoogle Workspace+24 | Top 5M | 4 patents Optical smoke detection systems using scattered radiation for fire safety monitoring | 2 job openings · 1 expansion |
| 8 | Lucibel Manufacturer of lighting solutions for tertiary, industrial, and museum applications | $37M | 143 mo ago | 56 | Frederic Granotier Founder & CEO | WordPressMySQLPHP+17 | Top 10M | 178 patents Medical phototherapy devices and network‑connected decorative lighting systems | — |
| 9 | Lucibel Develops luminaires for simulating daylight, and builds other LiFi-compatible luminaires and accessories | $37M | 143 mo ago | 53 | Frederic Granotier Founder & CEO | — | — | 178 patents Smart medical phototherapy lighting and networked decorative illumination systems. | — |
| 10 | Effy Online platform offering home renovation energy efficiency solutions and financial aid options for homeowners | $23M | 38 mo ago | 299 | Frederic Utzmann Co-Founder & CEO | Apple iCloud MailMicrosoft 365TypeScript+21 | Top 500k | — | — |
| 11 | RED Manufacturer and distributor of smart lighting solution for optimizing plant growth 24Funding top 39%Talent bottom 49%Product bottom 48%Tech bottom 46% All 8 signals ▾Fundingtop 39% Talentbottom 49% Productbottom 48% Techbottom 46% Marketbottom 36% Globalbottom 36% Growthbottom 35% Newsbottom 24% Funding: Raised $21.6M across 2 rounds · 2 rounds over 5 yrs (0.4/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 24/100 | $22M | 30 mo ago | 30 | Louis Golaz Co-Founder & CEO | WordPressMySQLPHP+19 | Top 10M | — | — |
| 12 | KEEY Aerogel Provider of aerogel based solutions 21Patents top 31%Product top 36%Innovation top 37%Moat top 45% All 9 signals ▾Patentstop 31% Producttop 36% Innovationtop 37% Moattop 45% Fundingtop 47% Talentbottom 49% Globalbottom 37% Marketbottom 23% Techbottom 17% Patents: 39 patents matched (strict assignee match) · 21 filings since 2022 vs 18 in 2017-21 Product: 4 distinct product lines · Company stage: Series A rank vs industry peers · Fliar Intelligence Index 21/100 | $20M | 16 mo ago | 10 | Francisco Ruiz CEO & President & Managing Director | — | — | 39 patents Hydrophobic silica aerogel synthesis and lignin‑coated cellulose aerogel insulation/battery separators | — |
| 13 | Sunna Design Manufacturer of solar lighting solutions for public and private sector | $16M | 69 mo ago | 60 | — | WordPressMySQLPHP+31 | Top 5M | 32 patents Dynamic control and energy management for autonomous electrical equipment and lighting systems | — |
| 14 | Hello Watt Online platform for utility cost comparison | $13M | 31 mo ago | 98 | Sylvain Falher Founder & CEO | SentryApple iCloud MailGoogle Workspace+16 | Top 100k | — | — |
| 15 | Cooltech Applications Magnetic cooling system for commercial refrigeration | $12M | 143 mo ago | 19 | Christian MULLER Founder | — | — | 482 patents Magnetocaloric refrigeration and heat‑generation systems for efficient thermal management | — |
| 16 | Beeldi Asset management platform for building energy and regulatory diagnosis | $10M | 43 mo ago | 44 | Kevin Port Co-Founder & CEO | — | — | — | — |
| 17 | Lancey Provider of home heating solutions | $9M | 56 mo ago | 44 | — | WordPressMySQLPHP+23 | Top 50M | — | — |
| 18 | Energiency Cloud-based platform for optimizing industrial energy efficiency | $9M | 75 mo ago | 27 | Arnaud Legrand CEO | WordPressMySQLPHP+19 | Top 50M | — | — |
| 19 | Cozynergy Provider of app-based energy renovation services to increase energy savings | $7M | 71 mo ago | 140 | — | YouTubecore-jsSwiper+8 | Top 1M | — | 1 job opening · 2 partnerships |
| 20 | Enertime Manufacturer of organic rankine cycle modules | $7M | 91 mo ago | 32 | Gilles David Co-Founder & CEO | QuillYouTubeAlpine.js+22 | Top 50M | 13 patents Advanced turbomachinery sealing, vacuum circuits, and thermal energy storage for dense-fluid turbines. | — |
| 21 | EQUIUM Provider of acoustic heat pumps | $7M | 27 mo ago | 15 | Cedric Francois Founder & CEO | WebflowYouTubecore-js+12 | Top 50M | — | 1 partnership · 1 award |
| 22 | Advizeo Provider of energy management solutions for commercial applications | $6M | 56 mo ago | 102 | — | WordPressMySQLPHP+25 | Top 5M | — | 1 launch |
| 23 | Energisme AI-driven building energy management solution for buildings 32Product top 22%Talent top 38%Funding top 43%Market top 45% All 13 signals ▾Producttop 22% Talenttop 38% Fundingtop 43% Markettop 45% AItop 45% Moattop 45% Fin. healthbottom 47% Growthbottom 40% Globalbottom 39% Techbottom 24% Patentsbottom 24% Innovationbottom 23% Newsbottom 17% Product: 2 published apps (3.7k installs) · Company stage: Public Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 32/100 | $6M | 2 mo ago | 81 | Thierry Chambon CEO | WordPressMySQLSalesforce+19 | Top 5M | 2 patents Demand‑side load control and consumer electricity management | 2 partnerships |
| 24 | Kelvin Platform for energy management | $5M | 24 mo ago | — | Clementine Lalande Founder & CEO | WebflowReactLodash+16 | Top 5M | — | — |
| 25 | Izigloo Online platform offering home improvement and energy management services | $5M | 112 mo ago | — | Fabien Ratier Founder | — | — | — | — |
| 26 | AwoX Provider of wifi-enabled smart home appliances | $5M | 210 mo ago | 86 | — | — | — | 81 patents Smart home IoT device synchronization, predictive control, lighting, and secure communication. | — |
| 27 | Luniwave Provider of an energy monitoring platform | $4M | 2 mo ago | — | Eloi Bonte Co-Founder | WebflowYouTubePreact+12 | Top 50M | — | — |
| 28 | Wattsense SaaS-driven IoT-based hardware and software solution building management | $4M | 80 mo ago | 20 | Louis Vermorel Founder & CEO | PrismicNode.jsReact+21 | Top 5M | — | — |
| 29 | H2i Guirled Developer of LED technology and end products | $4M | — | 11 | Remi Monge Co-Founder | — | — | — | 2 launchs |
| 30 | Nexdot Provider of quantum dot materials for displays lighting and optoelectronics | $4M | 48 mo ago | 45 | Benoit Dubertret Co-Founder | — | — | 191 patents UV‑resistant nanocoatings and optical filter nanocomposites for glass and displays | — |
| 31 | Enersens Developer of silica aerogel material | $3M | 52 mo ago | — | Denery Fenouil CEO | Cart FunctionalityWooCommerceWordPress+24 | Top 50M | 28 patents Manufacturing advanced aerogel/xerogel thermal insulation via dielectric heating processes | — |
| 32 | Kocliko Provider of individual heating costs monitoring method | $3M | 60 mo ago | 16 | Fabio Munaretto Co-Founder & CPO | WordPressZohoMySQL+27 | Top 10M | 11 patents Building heating energy measurement and metering for room-level thermal consumption | 1 partnership |
| 33 | Mobility Work Provider of computerized maintenance management solution 45Tech top 20%Talent top 38%Growth top 45%Product bottom 48% All 7 signals ▾Techtop 20% Talenttop 38% Growthtop 45% Productbottom 48% Fundingbottom 41% Marketbottom 34% Globalbottom 32% Tech: 53 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon Web Services Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 45/100 | $3M | 44 mo ago | 30 | Marc-Antoine Talva Co-Founder | WordPressMySQLPHP+30 | Top 5M | — | 1 launch |
| 34 | Airthium Provider of heat pumps | $3M | 26 mo ago | 13 | — | Node.jsVarnishAnt Design+5 | Top 50M | — | — |
| 35 | Qualisteo Energy consumption assessment using proprietary meters | $3M | 148 mo ago | — | Pierre Lambert Co-Founder & Co-CEO | — | — | — | 1 partnership |
| 36 | qualisteo Qualisteo, a start-up company based in Nice specialised in smart grids company. | $3M | 148 mo ago | 25 | — | PHPApache HTTP ServerIsotope+10 | Top 50M | — | — |
| 37 | BeeBryte Offering AI based predictive HVAC-R control software for smarter buildings & factories | $3M | 92 mo ago | 37 | Patrick Leguillette Founder | WordPressApple iCloud MailMicrosoft 365+23 | Top 50M | — | 3 partnerships |
| 38 | Water Horizon Provider of waste heat recovery systems for renewable energy generation projects | $3M | 53 mo ago | 24 | Jean-Emmanuel Faure Founder & CEO | WordPress Block EditorElementorWordPress+22 | Top 50M | — | 3 job openings |
| 39 | Agronergy Firm engaged in design and installation of biomass boilers | $2M | 89 mo ago | 30 | Stephane Vidaillet Chief Executive Officer | Cart FunctionalityWordPressMySQL+18 | Top 50M | — | 2 job openings · 1 internship |
| 40 | MyLight Systems Provider of app-based connected solar panels | $2M | 68 mo ago | 43 | Ondine Suavet Co-Founder & CEO | Node.jsLeafletGoogle Maps+17 | Top 1M | — | 2 partnerships |
| 41 | Monga Provider of SaaS-driven property maintenance management software for owners and landlords | $2M | 45 mo ago | 33 | Kevin Valensi COO & Co-Founder | WordPressApple iCloud MailGoogle Workspace+32 | Top 10M | — | — |
| 42 | GridPocket Provider of a SaaS-driven energy management solution | $2M | 44 mo ago | 18 | — | — | — | 2 patents Selective power‑source connection management for portable electronic devices | — |
| 43 | Enerdigit Platform for monitoring energy consumption of industrial buildings | $1M | 21 mo ago | 15 | Benedicte Pleau Founder | WordPressMySQLPHP+23 | Top 10M | — | — |
| 44 | Enogrid Provider of energy monitoring solutions | $1M | 40 mo ago | 23 | Remi Bastien Co-Founder | WordPressMySQLPHP+36 | Top 5M | — | 1 partnership |
| 45 | Glowee Provider of bioluminescent lighting solutions | $678K | 36 mo ago | 25 | Sandra Rey Founder & CEO | WordPressMySQLPHP+17 | Top 50M | 10 patents Engineered bioluminescent proteins and bacterial systems for sustainable lighting of façades and decorative panels. | — |
| 46 | eyeGauge Provider of IoT-based solution for building energy management | $575K | 30 mo ago | 6 | Viktoriia Kobenko Co-founder & CTO | — | — | 9 patents Rotating shaft torque/thrust measurement and AI-driven non‑intrusive equipment condition monitoring. | — |
| 47 | Energy Pool Demand Response aggregator | $557K | 27 mo ago | 171 | Olivier Baud Founder & CEO | TypeScriptAmazon Web ServicesZone.js+4 | Top 50M | 27 patents Local electrical energy management, rectifier control, and power‑balancing for distribution networks | — |
| 48 | Condor Energy Provider of an energy operating system for industrial and commercial clients | $500K | 5 mo ago | — | Florian Perocheau Co-Founder & CPO | — | — | — | — |
| 49 | Sensewaves Offering time-series analytics solutions for the Internet of Things (IoT) and Smart Grid | $161K | 8 mo ago | 6 | — | — | — | — | — |
| 50 | Plume Provider of energy management platform | $125K | 2 mo ago | — | Jean-Baptiste Fage Co-Founder | — | — | 6 patents Foldable electric scooter steering mechanisms and integrated battery charging systems | 2 launchs |
Top 12 Energy Efficiency Tech companies in France
#1
Acquired · Puteaux, Ile de France · founded 2007$171.8Mraised▾
Provider of energy efficiency, solar energy production, storage, and electric mobility solutions. The company offers financed, modular solutions, combining green energy production, energy performance, energy storage, and electric vehicle charging infrastructure. It provides energy consumption optimization, renewable energy production, and energy storage to maximize energy independence. The company also facilitates electric mobility adoption through charging infrastructure deployment.
- Apr 2026Conventional Debt$938M
- Jan 2025Conventional Debt$73M
- Feb 2022Conventional Debt$221.9M
- 2018Series A$171.8M
#2
Public · Boulogne billancourt, Ile de France · founded 2004 · 81 employees$5.8Mraised▾
AI-driven building energy management solution for buildings. Allows users to control and reduce the energy consumption of buildings and industrial processes. Provide a set of software and hardware solutions that allow them to collect, analyze and use the data from multiple sites. The platform uses sensors to collect data about water, gas, electricity, and temperature and also interface with the already existing systems on customer sites. Once installed these sensors, customer consumption data is sent in real-time and accessed online via PC, SmartPhone, or Tablet.
- Mar 2026Post IPO$5.8M
#3
Seed · Paris, Ile de France · founded 2021$4.2Mraised▾
Provider of an energy monitoring platform. It provides solutions to measure and enhance customers' savings. It tracks consumption and savings in real time, and visualize the return on investment.
- Apr 2026Seed$4.2M
#4
Series B · Paris, Ile de France · founded 2013 · 172 employees$46.4Mraised▾
Developer of energy management and optimization system for various sectors. The system helps organizations monitor energy performance and carbon impact reduction. It allows teams to detect optimization opportunities and monitor progress. The system provides visualization of energy costs to manage net-zero strategies.
- Nov 2024Series B$13.1M
- Jul 2021Series B$21.3M
- Jun 2019Series A$11.4M
- Oct 2018Series A$9.2M
#5
Series A · Habsheim, Haut-rhin · founded 2015 · 10 employees$19.6Mraised▾
Provider of aerogel based solutions. Products include extraction of silica from waste to create aerogels, low temperature supercritical drying.
- Jan 2025Series A$18.9M
- Sep 2020Grant (prize money)—
- Jan 2020Grant (prize money)—
- Jan 2020Grant (prize money)$322.3K
#6
Series E · Echirolles, Auvergne Rhone Alpes · founded 2011 · 210 employees$206.4Mraised▾
Provider of micro LED-based display systems. The solution uses standard silicon wafers with diameters of eight inches and existing CMOS wafer-fabrication processes & tools. It also offers displays for VR, AR, MR, and smartwatch applications, using its megapixel integrated silicon chips.
- Sep 2023Series E$127.4M
- Sep 2022Grant (prize money)$1.1M
- May 2022Conventional Debt$30M
- Feb 2022Series D$16.9M
#7
Seed · Paris, Ile de France · founded 2026$500Kraised▾
Provider of an energy operating system for industrial and commercial clients. The system helps clients monitor, forecast, and hedge energy exposure. It also optimizes procurement and consumption using data-driven strategies. The operating system aggregates consumption data, power purchase agreements, and market data into real-time dashboards. It also analyzes load data to detect flexibility and quantify return on investment.
- Jan 2026Seed$500K
#8
Series A · Amiens, Hauts de France · founded 2024$125Kraised▾
Provider of energy management platform. It allows you to reduce your bills, and increase your energy rating. The software based on the 3CL calculation method offers an energy assessment solution, administrative support, support during and after the work, and more.
- Apr 2026Series A$3.9M
- Sep 2024Seed$500K
#9
Series B · Boulogne-Billancourt, Ile-de-France · founded 2017 · 152 employees$121.2Mraised▾
AI-based energy consumption management solutions. It provides low-carbon heating solutions for buildings by using geothermal storage and artificial intelligence. Solutions include accent. design and Intelligent control of the low-carbon boiler.
- Sep 2023Series B$116M
- Oct 2019Series A$5.2M
#10
Series B · Bordeaux, Nouvelle Aquitaine · founded 2015 · 39 employees$56.1Mraised▾
Provides solar heat and waste heat recovery solutions. It designs and operates renewable heat production and recovery plants and provides solutions for industrial sites, urban heating networks, and market garden greenhouses.
- Nov 2023Series B$32.7M
- Dec 2021Series A$7.9M
- Dec 2021Grant (prize money)$5.1M
- 2020Series A$13.4M
#11
Acquired · Paris, Ile de France · founded 2017 · 180 employees$46.1Mraised▾
Provider of elevator maintenance services. It offers elevator & lifts maintenance, repair services, and supply spare parts for equipment. The company offers solutions for commercial buildings, corporates, residential communities & more. It provides services through its online B2B platform to connect, and access customer queries.
- Dec 2023Series B—
- Jun 2021Series B$35.8M
- Apr 2019Series A$7.9M
- Feb 2018Seed$2.5M
#12
Series C · Paris, Ile de France · founded 2014 · 5 employees$177Mraised▾
SaaS-driven solutions for energy monitoring for buildings. The company collects data from customers and do the analysis for energy improvement measures and provides a dashboard with appropriate action plans.
- Mar 2022Series C$165.7M
- Jun 2019Series B$9M
- Jun 2016Series A$2.3M
- 2015Seed—
Funding & investor landscape
Notable founders
How research on Energy Efficiency & Buildings is moving in France
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 525 France-affiliated papers.
- Centre National de la Recherche Scientifique116
- École Polytechnique Fédérale de Lausanne34
- Nantes Université21
- Université de Lorraine21
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives18
- Energy management11→22
- Photovoltaic system2→11
- Renewable energy3→12
- Microgrid3→8
- Passive cooling1→5
- Energy management35→69
- Microgrid9→33
- Energy management system15→39
- Renewable energy15→35
- Photovoltaic system11→29
- Heat pump1→6
Where energy efficiency is researched across France
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 France
France energy efficiency patent filing is accelerating — 190 filings from 239 assignees (2016–2025), led by Valeo Systemes Thermiques, Commissariat Energie Atomique, Zodiac POOL CARE Europe; annual filings 25→38.
- Valeo Systemes Thermiques25
- Commissariat Energie Atomique15
- Zodiac POOL CARE Europe13
- Electricite DE France12
- XEDA International11
- Peugeot Citroen Automobiles11
- SUEZ INT11
- Renault9
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.