Best Energy Efficiency Tech Companies in Ile de France, France
The 76 best Energy Efficiency Tech companies in Ile de France, France in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Deepki.
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 Ile de France
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Deepki SaaS-driven solutions for energy monitoring for buildings | $177M | 50 mo ago | 5 | Vincent Bryant Co-Founder & CEO | WordPressApple iCloud MailGoogle Workspace+18 | — | 1 award |
| 2 | GreenYellow 🦄 Provider of energy efficiency, solar energy production, storage, and electric mobility solutions | $172M | 1 mo ago | — | Otmane Hajji Founder | WordPress Site EditorElementorWordPress+25 | — | — |
| 3 | 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 | 19 mo ago | 172 | Vincent Sciandra CEO | WordPressMySQLPHP+17 | — | 1 award |
| 4 | WeMaintain Provider of elevator maintenance services | $46M | 30 mo ago | 180 | Tristan Foureur Co-Founder & CTO | PrismicApple iCloud MailGoogle Workspace+24 | 5 patents Optical smoke detection systems employing scattered radiation techniques | 2 job openings · 1 expansion |
| 5 | Lucibel Manufacturer of lighting solutions for tertiary, industrial, and museum applications | $37M | 143 mo ago | 56 | Frederic Granotier Founder & CEO | WordPressMySQLPHP+17 | 178 patents Medical phototherapy devices and network‑connected decorative lighting systems | — |
| 6 | 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 | — | — |
| 7 | Hello Watt Online platform for utility cost comparison | $13M | 31 mo ago | 98 | Sylvain Falher Founder & CEO | SentryApple iCloud MailGoogle Workspace+16 | — | — |
| 8 | Beeldi Asset management platform for building energy and regulatory diagnosis | $10M | 43 mo ago | 44 | Kevin Port Co-Founder & CEO | — | — | — |
| 9 | Enertime Manufacturer of organic rankine cycle modules | $7M | 91 mo ago | 32 | Gilles David Co-Founder & CEO | QuillYouTubeAlpine.js+22 | 13 patents Advanced turbomachinery sealing, vacuum circuits, and thermal energy storage for dense-fluid turbines. | — |
| 10 | Advizeo Provider of energy management solutions for commercial applications | $6M | 56 mo ago | 102 | — | WordPressMySQLPHP+25 | — | 1 launch |
| 11 | 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 | 2 patents Demand‑side load control and consumer‑level electricity distribution management | 2 partnerships |
| 12 | Kelvin Platform for energy management | $5M | 24 mo ago | — | Clementine Lalande Founder & CEO | WebflowReactLodash+16 | — | — |
| 13 | Luniwave Provider of an energy monitoring platform | $4M | 2 mo ago | — | Eloi Bonte Co-Founder | WebflowYouTubePreact+12 | — | — |
| 14 | 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 | — |
| 15 | 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 | — | 1 launch |
| 16 | Airthium Provider of heat pumps | $3M | 26 mo ago | 13 | — | Node.jsVarnishAnt Design+5 | 2 patents Rapid quasi‑isothermal gas compression/expansion devices for energy storage | — |
| 17 | AVOB Provider of building energy management software for commercial spaces | $3M | 165 mo ago | 21 | Jean-Charles Matamoros Co-Founder | WordPressMySQLZoho+17 | — | — |
| 18 | Eficia Designer of PLC-based devices and cloud applications for energy monitoring of buildings | $2M | 125 mo ago | 100 | Alric Marc Founder & CEO | WordPressMySQLPHP+35 | — | 1 launch · 1 partnership |
| 19 | Agronergy Firm engaged in design and installation of biomass boilers | $2M | 89 mo ago | 30 | Stephane Vidaillet Chief Executive Officer | Cart FunctionalityWordPressMySQL+18 | — | 2 job openings · 1 internship |
| 20 | 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 | — | — |
| 21 | Ween Provider of smart thermostat controllers | $2M | 125 mo ago | 9 | — | — | 8 patents Smart HVAC thermostat control and alarm system management technologies. | — |
| 22 | Hxperience Online energy management service for commercial and industrial buildings | $2M | 100 mo ago | 16 | Claude F Co-Founder | WordPressMySQLPHP+29 | — | — |
| 23 | Uptime SaaS-driven predictive maintenance for building systems | $980K | 110 mo ago | 67 | — | — | 2 patents Real-time data correlation and monitoring systems for industrial process control | — |
| 24 | Glowee Provider of bioluminescent lighting solutions | $678K | 36 mo ago | 25 | Sandra Rey Founder & CEO | WordPressMySQLPHP+17 | 10 patents Engineered bioluminescent proteins and bacterial systems for sustainable lighting of façades and decorative panels. | — |
| 25 | 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. | — |
| 26 | Energy Pool Demand Response aggregator | $557K | 27 mo ago | 171 | Olivier Baud Founder & CEO | TypeScriptAmazon Web ServicesZone.js+4 | 27 patents Local electrical energy management, rectifier control, and power‑balancing for distribution networks | — |
| 27 | EGreen Home energy management platform | $551K | 137 mo ago | — | Jeremie Jean Founder | Wix eCommerceWixSentry+19 | — | — |
| 28 | Condor Energy Provider of an energy operating system for industrial and commercial clients | $500K | 5 mo ago | — | Florian Perocheau Co-Founder & CPO | — | — | — |
| 29 | Voltalis Provider of solutions for electrical heating and energy consumption management | $395K | 72 mo ago | 150 | Pierre Bivas Founder | WordPressApple iCloud MailMicrosoft 365+28 | 135 patents Smart grid distributed measurement and load‑curve smoothing for energy consumption control | 3 partnerships |
| 30 | Sensewaves Offering time-series analytics solutions for the Internet of Things (IoT) and Smart Grid | $161K | 8 mo ago | 6 | — | — | — | — |
Top 12 Energy Efficiency Tech companies in Ile de 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
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
#6
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
#7
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—
#8
Seed · Paris, Ile de France · founded 2015 · 6 employees$160.6Kraised▾
Sensewaves makes connected assets smarter by transforming raw sensor data into impactful insights. Sensewave platform provides a complete time-series, streaming analytics solution through a set of predictive, prescriptive and trend analysis tools for energy and lifecycle management applications with a focus on real-time, context-aware anomaly detection for industrial and mission-critical applications. Using their analytics solution it offers dynamic grid optimization, asset management, real-time load balancing, building and residential analytics.
- Sep 2025Seed—
- Apr 2015Grant (prize money)$160.6K
#9
Series A · Paris, Ile de France · founded 2023$5.4Mraised▾
Platform for energy management. It estimates the energy performance of home and suggests initial recommendations for work.
- Jun 2024Series A$5.4M
#10
Series B · Paris, Ile de France · founded 2017 · 98 employees$12.9Mraised▾
Online platform for utility cost comparison. Services offered include providing a list of energy providers to choose from along with assistance with the energy contract. Consumers can upload energy usage data to the website, following which the list of suppliers is provided with options for contracts.
- Nov 2023Series B$12.9M
#11
Series A · Paris, Ile de France · founded 2008 · 299 employees$22.5Mraised▾
Online platform offering home renovation energy efficiency solutions and financial aid options for homeowners. It offers a range of services including insulation (walls, attics, roofs, windows), heating system upgrades (heat pumps, boilers, stoves), and solar panel installations. The company provides project analysis, work execution, and assistance with managing energy consumption. They also offer support with accessing government grants and incentives for home renovations. Their services aim to improve home comfort and reduce energy bills.
- Mar 2023Series A$21.7M
- Jan 2009Seed$842.4K
#12
Series A · Paris, Ile de France · founded 2015 · 13 employees$3.4Mraised▾
Provider of heat pumps. It uses iso-thermal gas compression solution to achieve a near-ideal Ericsson cycle for heating purposes.
- Mar 2024Series A$3.2M
- 2017Seed$120K
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy Efficiency Tech 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 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
- SUEZ INT11
- Peugeot Citroen Automobiles11
- Favier Georges9
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.