Best Energy Efficiency Tech Companies in Spain
The 102 best Energy Efficiency Tech companies in Spain in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Submer.
Spain's Energy Efficiency Tech scene is more active than the headline numbers suggest, and this directory ranks the 102 companies we track here by disclosed equity funding and recent funding momentum. Total disclosed funding sits at $134M. One company accounts for most of it.
Submer has pulled in $90M, which dwarfs everyone else in the cohort. The remaining field, Optimitive, Clevergy, Evoltio, and others, clusters below $2M each, so you're looking at a market shaped by one outlier and a long tail of early-stage bets. No unicorns yet. What's interesting is that investor appetite hasn't dried up: backers like EIT InnoEnergy, EIC Fund, and Caixa Capital Risc keep showing up across the cap table, and median install growth across energy apps is running at roughly +28% YoY, which tells you end-user demand is real. Hot themes driving deal flow right now include EV battery technology, solar electricity generation, and next-generation EV platforms. I'd watch that EV powertrain cluster closely, because Spain's grid transition gives those bets a structural tailwind that most other markets can't match.
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 Spain
| # | Company | Disclosed funding | Last round | Stage | Employees | Founded | Founder | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Submer Manufacturer of liquid cooling systems for high density server hardware | $90M | 18 mo ago | Series C | 108 | 2015 | Daniel Pope Co-Founder & CTO | 3 patents Liquid cooling solutions for high‑performance computing hardware | 1 launch |
| 2 | Enertika Provider of website hosting and domain name services. This company offers website hosting plans designed for… | $6M | 108 mo ago | Series A | 86 | 2008 | — | — | — |
| 3 | XESOL Innovation Solutions for autonomous and intelligent cars | $5M | 83 mo ago | Funding Raised | 18 | 2012 | Sergio Hernandez Co-Founder & COO | — | — |
| 4 | Wellness TechGroup Provides data intelligence software solutions | $4M | 67 mo ago | Series A | 61 | 2008 | David Ternero Founder & CEO | — | — |
| 5 | AEInnova Offering solution to generate electricity from waste heat recovery systems | $4M | 30 mo ago | Series B | 19 | 2014 | Raúl Aragonés Ortiz Founder | — | 1 partnership · 1 award |
| 6 | Momit Smart devices for home temperature control | $3M | 125 mo ago | Deadpooled | 12 | 2012 | Miguel Angel Sánchez Mozo Co-Founder & CEO | — | — |
| 7 | S&C SaaS-driven energy management solutions for commercial spaces | $3M | 61 mo ago | Funding Raised | — | 2006 | Narcis Avellana Co-Founder & CEO | — | — |
| 8 | Wattio Home automation solutions provider | $2M | 138 mo ago | Deadpooled | 9 | 2012 | Patxi Echeveste Founder & CEO | — | — |
| 9 | Evoltio Provider of energy management solutions combining expert analysis with proprietary technology | $2M | 12 mo ago | Seed | — | 2024 | Jaime Rocabert Co-Founder | — | — |
| 10 | Clevergy Provider of building energy management solutions for commercial spaces | $2M | 8 mo ago | Series A | 7 | 2021 | Beltran Aznar Co-Founder & CEO | — | 1 partnership |
| 11 | Ledmotive Connected intelligent LED lightning solution | $2M | 86 mo ago | Series A | 6 | 2012 | Meritxell Molins Co-Founder & CEO | — | — |
| 12 | Optimitive Energy efficient solutions for industries 24AI top 15%Talent bottom 49%Tech bottom 46%Moat bottom 44% All 10 signals ▾AItop 15% Talentbottom 49% Techbottom 46% Moatbottom 44% Fundingbottom 43% Globalbottom 39% Marketbottom 32% Newsbottom 32% Patentsbottom 30% Innovationbottom 26% AI: Holds AI/ML patents (G06N-family CPC) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 24/100 | $2M | 4 mo ago | Series A | 22 | 2008 | Fernando De La Prida CEO | 5 patents AI-driven modular real-time data processing frameworks for autonomous learning components | — |
| 13 | Ionly Manufacturer of lithium iron phosphate batteries for residential and industrial use | $1M | 2 mo ago | Seed | — | 2024 | Alejandro Desco Co-Founder & CEO | — | — |
| 14 | Dexma Provider of cloud-based energy management and analytics solutions | $1M | 69 mo ago | Acquired | 70 | 2007 | Guillem Corominas Co-Founder | — | — |
| 15 | Enefgy Online building energy management solution for buildings | $1M | 186 mo ago | Seed | 13 | 2008 | Javier Torres-Quevedo Co-Founder | — | — |
| 16 | Bettergy Data analytics and energy monitoring platform | $1M | 82 mo ago | Funding Raised | 36 | 2011 | Antonio Ruiz CEO | — | — |
| 17 | Roomonitor Guest management app for accommodation providers | $766K | 102 mo ago | Seed | 33 | 2016 | Eduardo Suarez Co-Founder | — | — |
| 18 | INDRESMAT Developer of bio-based polyurethane solutions for energy-efficient building thermal insulation | $731K | 65 mo ago | Funding Raised | 10 | 2017 | — | 8 patents Continuous casting of constant‑section polyurethane profiles for molded products | — |
| 19 | Mirubee Energy consumption monitoring for homes | $467K | 153 mo ago | Seed | 2 | 2011 | — | — | — |
| 20 | Zonox Energy tariff comparison and switching platform | $464K | 19 mo ago | Seed | — | 2022 | Manuel Pinazo Co-Founder & CEO | — | — |
| 21 | Smarkia Provider of SaaS-based energy management platform | $372K | 43 mo ago | Seed | 39 | 2011 | Javier Fernandez Founder & CEO | — | — |
| 22 | EcoMT Provider of energy monitoring solutions for commercial applications | $311K | 85 mo ago | Funding Raised | — | 2010 | Pedro Gabriel CEO | — | 1 partnership |
| 23 | Hobeen SaaS-based platform offering energy monitoring solutions for residential applications | $299K | 52 mo ago | Seed | — | 2019 | Mario Iglesias Founder & CEO | — | — |
| 24 | Leycolan Provider smart lighting systems for cities and factories | $294K | 124 mo ago | Funding Raised | — | 2015 | Ezcurra Felix President & CEO | — | — |
| 25 | OpenDomo Services Energy management system for homes and industries | $240K | 128 mo ago | Deadpooled | 3 | 2006 | Elisabet Cuenca Co-Founder & CEO | — | — |
| 26 | Gesinne Provider of voltage optimization systems for industries | $221K | 111 mo ago | Funding Raised | 9 | 2014 | Jesus Alonso Vallaure CEO | — | — |
| 27 | Articae Smart Technologies Provider of IoT and AI-based energy management solutions | $216K | 28 mo ago | Seed | — | 2020 | Juan Carrizo Co-Founder & CEO | — | — |
| 28 | Smartive Provider of cloud-based monitoring solution for wind farm assets | $215K | 68 mo ago | Deadpooled | 3 | 2013 | — | — | — |
| 29 | Wattabit Energy Management Solution for Industries | $160K | 106 mo ago | Funding Raised | 1 | 2013 | — | — | — |
| 30 | Ohmvo Provider of thin silicone heating mats | $111K | 72 mo ago | Funding Raised | — | 2015 | Jose Llaurado CEO | — | — |
| 31 | Heatconv Electricity generation based on the capture of infrared radiation | $111K | 76 mo ago | Deadpooled | 3 | 2016 | Pablo Flores CEO | — | — |
| 32 | Quodus Provider of solutions for infrastructure monitoring and teaching analytics | $100K | 14 mo ago | Seed | — | 2019 | Carlos Zaccaro Co-Founder | — | 1 partnership |
Top 12 Energy Efficiency Tech companies in Spain
#1
Series C · Barcelona, Catalonia · founded 2015 · 108 employees$89.5Mraised▾
Manufacturer of liquid cooling systems for high density server hardware. These products facilitate thermal management for computing infrastructure through immersion and direct chip cooling technologies. The hardware supports heat removal from processors to maintain operational stability in data processing environments. The systems are designed to integrate with existing server racks and cooling infrastructure to manage heat output from high performance computing components.
- Dec 2024Conventional Debt$20.9M
- Oct 2024Series C$55.5M
- Jan 2022Series C$34M
- Sep 2020Series A$12M
#2
Series A · Vitoria-gasteiz, Alava · founded 2008 · 22 employees$1.9Mraised▾
Optimitive is a provider of IT solutions and services for real-time industrial energy efficiency and process optimisation. It offers OPTIBAT energy for the online optimization of industrial energy expenditure, OPTIBAT water for the online optimization of chemical wastewater treatments and biological sewage treatment and OPTIBAT Trainer, a software tool for process data analysis and off-line optimization
- Feb 2026Series A$5.9M
- Apr 2025Series A—
- Nov 2013Series A$1.9M
- Feb 2013Seed$30K
#3
Seed · Spain · founded 2024$1.4Mraised▾
Manufacturer of lithium iron phosphate batteries for residential and industrial use. The company provides battery solutions designed for safety, efficiency, and alignment with European standards. These batteries offer thermal stability and extended lifecycles. The company focuses on design, modular assembly, and repairable architecture.
- Mar 2026Seed$1.4M
#4
Series A · Madrid, Community of Madrid · founded 2021 · 7 employees$2.1Mraised▾
Provider of building energy management solutions for commercial spaces. It offers features such as comparing energy consumption, tracking consumption, and more.
- Oct 2025Series A$3.8M
- Jan 2024Seed$1.6M
- Jul 2022Seed$506.7K
#5
Seed · Sant Cugat del Valles, Catalonia · founded 2024$2.2Mraised▾
Provider of energy management solutions combining expert analysis with proprietary technology. The company offers energy procurement, consumption monitoring, and invoice management. It helps businesses optimize energy contracts, track usage, and identify cost savings. The company delivers insights and tools for informed energy decisions. It also manages administrative tasks related to energy supply.
- Jun 2025Seed$2.2M
#6
Seed · Malaga, Andalusia · founded 2022$464.3Kraised▾
Energy tariff comparison and switching platform. It is a technology-based energy management platform that provides personalized tariff comparisons and energy-saving solutions for consumers, leveraging data analytics and automation to optimize their energy consumption.
- Nov 2024Seed$464.3K
#7
Series B · Terrassa, Catalonia · founded 2014 · 19 employees$3.7Mraised▾
Offering solution to generate electricity from waste heat recovery systems. It is a system that can generate renewable energy from industrial waste heat using thermoelectric generators. Its patented microelectronic control system-based HEAT-R Waste Heat Recovering Units are lightweight modules with different geometries which is adaptable to any heat source and can be easily installed to recover waste heat into electricity.
- Dec 2023Series B$3.3M
- Aug 2020Series A$476K
- May 2020Grant (prize money)$563.1K
- Dec 2018Grant (prize money)$481.7K
#8
Seed · Seville · founded 2019$100Kraised▾
Quodos is a technology company that provides solutions for infrastructure monitoring, optimization of energy consumption, and teaching analytics. It enables users to improve the use of space and quality perceived by students. It utilizes multiparameter sensors and AI to detect the presence of people. It can be used in the classroom, libraries, office, parking lot, and more.
- Apr 2025Seed$100K
#9
Series A · Seville, Andalusia · founded 2008 · 61 employees$3.8Mraised▾
Wellness TechGroup provides data intelligence software solutions. It allows users to monitor, process and analyze data related to citizens, waste management data and other utility data. It enables users to analyze and capture actionable insights from the data. It uses IoT, big data and other technologies to provide solutions for smart lighting, smart waste management, smart mobility and smart cities.
- Nov 2020Grant (prize money)$546.4K
- Sep 2020Grant (prize money)$771.2K
- Jan 2020Grant (prize money)$380.9K
- May 2018Grant (prize money)—
#10
Funding Raised · Barcelona, Catalonia · founded 2006$2.8Mraised▾
SaaS-driven energy management solutions for commercial spaces. The company offers enControl - a web-based platform for energy management that leverages IoT technology for system automation alongside providing customization solutions for receiving messages and energy comparison stats. Features of the system include remote switching, an overview of multiple locations, and control of heating and cooling appliances with options for security system add-ons.
- May 2021Grant (prize money)$706.1K
- Nov 2020Grant (prize money)$111.3K
- Jan 2020Grant (prize money)$331.2K
- Jan 2016Grant (prize money)$394.8K
#11
Funding Raised · Vigo, Galicia · founded 2012 · 18 employees$4.6Mraised▾
Xesol Innovation is a Spanish R&D company focused on the automotive industry, providing solutions towards autonomous and intelligent cars. Xesol's current projects include SmartJump, SmartCars, and SmartCities. SmartJumps is an electromagnet AI-based shock absorbing solution for cars that provides cushioning for each vehicle wheel independently. SmartCars is a telematics solution for vehicles aimed at driving safety, reducing vehicle maintenance costs, lower fuel consumption and improved navigation. SmartCities has three sub-projects, including SmartParking (management detection of free parking spaces in real time), SmartBikes (bicycles with support services such as maps, voice instructions, statistics sightseeing) Smart SteetLights (aimed at reducing the costs of implementation of Smart City technologies to include in a single device + lighting + sensors connectivity charging points).
- Jun 2019Grant (prize money)$2.3M
- Jul 2017Grant (prize money)$2.3M
- Dec 2016Grant (prize money)$52.7K
- Jul 2016Grant (prize money)$55.7K
#12
Series A · Barcelona, Catalonia · founded 2008 · 86 employees$5.6Mraised▾
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- Jun 2017Series A$5.6M
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
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.