Best Sustainability Tech Companies in Spain
The 371 best Sustainability Tech companies in Spain in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Soty Solar.
Spain's Sustainability Tech sector is moving fast, and this directory ranks the best companies building it, ordered by disclosed equity funding and recent momentum across 371 tracked firms.
$693M in total disclosed funding tells you the capital is real. Soty Solar leads at $120M, with Submer close behind at $90M, and the rest of the field spread across earlier stages. One unicorn has already cleared the threshold. Investors backing this cohort include EIC Fund, EIT InnoEnergy, and Caixa Capital Risc, which means you're looking at a mix of European institutional muscle and deep-tech patient capital. Globally, the market sits at roughly $16.2B and is forecast to reach $122.7B by 2032, a 23.8% CAGR that makes Spain's current funding base look like early innings. The demand story is structural: smart grid adoption, low-carbon infrastructure, and green technology rollout aren't cyclical bets. So what's the friction? Regulatory fragmentation around green technology remains a real constraint, and layoffs hitting sustainability tech firms this year signal that capital efficiency pressure is rising even as long-term tailwinds hold. I'd watch the EV-adjacent plays closely. Battery technology and next-generation EV platforms are the hottest themes in the sector right now, and seed-stage climate tech funding keeps flowing globally, validating that early-stage conviction isn't cooling.
- MarketsandMarkets
Our analysis of 293 Sustainability Tech companies
$38.4b in tracked funding; 83% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Sustainability Tech companies in Spain
| # | Company | Disclosed funding | Last round | Stage | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Soty Solar A platform connecting multiple stakeholders in the solar industry | $120M | 4 mo ago | Acquired | 105 | — | PHPTailwind CSSLaravel+26 | — | 1 award |
| 2 | Recoverfiber 🦄 Manufacturer of recycled cotton fiber and fiber blends for textiles 50Moat top 15%Funding top 36%Tech top 40%Global top 44% All 7 signals ▾Moattop 15% Fundingtop 36% Techtop 40% Globaltop 44% Growthtop 45% Talenttop 45% Marketbottom 41% Moat: Editorial + unicorn rating 9/10 · Unicorn Funding: Raised $100M · 1 rounds over 4 yrs (0.2/yr) rank vs industry peers · Fliar Intelligence Index 50/100 | $100M | 48 mo ago | Series D | 4 | Anders Sjoblom Global Chief Executive Officer | Craft CMSApple iCloud MailMicrosoft 365+29 | — | 1 launch · 1 partnership · 1 award |
| 3 | Submer Manufacturer of liquid cooling systems for high density server hardware | $90M | 17 mo ago | Series C | 108 | Daniel Pope Co-Founder & CTO | WordPressMySQLPHP+23 | 3 patents Liquid cooling solutions for high‑performance computing hardware | 1 launch |
| 4 | DeepUll Developer of diagnostic technology for rapid identification of sepsis-causing pathogens | $35M | 13 mo ago | Series C | 26 | Rafel Gibert Co-Founder | PHPNginxCloudflare+11 | — | — |
| 5 | STAT-Dx Point of care system for syndromic testing of respiratory & gastrointestinal pathogens | $34M | 120 mo ago | Acquired | 30 | Jordi Carrera Founder & CEO | — | — | — |
| 6 | SOM Biotech Developer of platform for screening compounds to treat rare diseases | $29M | 30 mo ago | Series B | 15 | Raul Insa Founder & CEO | — | 117 patents Pharmaceutical compounds and formulations for treating dystrophinopathies, movement disorders, and PKU | — |
| 7 | ABAC Therapeutics Early stage biopharma developing precision drugs for MDR bacterial infections | $20M | 41 mo ago | Acquired | 8 | Domingo Gargallo-Viola Co-Founder & CSO | — | 31 patents Novel small‑molecule antibiotics for Gram‑positive bacterial infections | — |
| 8 | Geodesic Innovations Provider of advanced solutions for water tratment | $15M | 20 mo ago | Series B | — | Miral Mehta CEO | PHPThree.jsCloudflare+17 | 8 patents Electroporation-based water disinfection and preservation systems for circuit water management. | — |
| 9 | Vaxdyn Prophylactic vaccines against multidrug resistant bacterial infections | $14M | 21 mo ago | Series A | 8 | — | — | 20 patents LPS-deficient multivalent vaccines targeting Acinetobacter baumannii infections | — |
| 10 | Aelix Therapeutics Developer of therapies for treating HIV | $13M | 77 mo ago | Series A | 10 | Christian Brander Co-Founder | — | 25 patents TLR7 agonist adjuvant formulations enhancing HIV vaccine immunogenicity | — |
| 11 | Laminar Pharma Developer of melipathy based drugs | $12M | 22 mo ago | Series A | 30 | — | WordPressPleskMySQL+29 | — | — |
| 12 | WtE-As Provider of solutions to convert waste into fuel | $12M | 4 mo ago | Series B | 5 | Andres Ponce Founder & CEO | WordPressMySQLPHP+16 | — | — |
| 13 | Onyx Solar Manufacturer of photovoltaic glass for building integrated applications and solutions | $11M | 59 mo ago | Seed | 72 | Teodosio Cano Co-Founder & Chief Technical Officer | JoomlaPleskPHP+18 | 13 patents Building-integrated photovoltaic glass and walkable solar flooring solutions. | 1 partnership |
| 14 | Green Eagle Solutions Provider of software solutions for solar and wind energy projects 45Product top 36%Talent top 38%Innovation top 39%Tech top 42% All 8 signals ▾Producttop 36% Talenttop 38% Innovationtop 39% Techtop 42% Fundingtop 49% Globalbottom 38% Marketbottom 35% Newsbottom 22% Product: 5 distinct product lines · Company stage: Series A Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 45/100 | $10M | 29 mo ago | Series A | 38 | Alejandro Cabrera Co-Founder & CEO | Apple iCloud MailMicrosoft 365TypeScript+13 | — | 1 launch |
| 15 | ClimateTrade Provider of carbon offsetting marketplace and SaaS solutions. | $9M | 60 mo ago | Seed | 40 | Francisco Benedito Co-Founder & CEO | Cart FunctionalityWordPressMySQL+38 | — | — |
| 16 | Delfos Software technology for monitoring renewable energy products | $8M | 3 mo ago | Seed | — | Samuel Lima Co-Founder & CTO | WebflowAmazon Web ServicesGSAP+22 | — | 1 launch |
| 17 | Oxolife Developer of a first-in-class oral drug improving embryo implantation | $7M | 3 mo ago | Series A | 10 | Ignasi Almazan Co-Founder | WordPress Block EditorWordPressMySQL+18 | 80 patents Tungsten(VI) salt hydrates for fertility therapeutics and their manufacturing processes | — |
| 18 | EQTEC | $6M | 28 mo ago | Public | 30 | David Palumbo CEO | WordPressMySQLPHP+19 | — | — |
| 19 | RatedPower Provider of software for solar, storage, and hybrid plant design | $6M | 56 mo ago | Acquired | 80 | Juan Romero González CTO & Co-founder | Three.jsTailwind CSSReact+19 | — | — |
| 20 | Captoplastic Provider of capturing microplastics from aqueous environments | $5M | 12 mo ago | Seed | 10 | Ismael Olmedo Cano CEO Captoplastic | WordPressMySQLPHP+16 | 39 patents Magnetic separation and regeneration systems for extracting microplastics from water | 1 job opening |
| 21 | INNITIUS Developer of a device for monitoring labor in pregnant women | $5M | 40 mo ago | Seed | 22 | — | WordPressMySQLPHP+22 | — | 1 launch · 1 partnership |
| 22 | AlgaEnergy Provider of microalgae based agricultural biostimulant producing services | $5M | 59 mo ago | Seed | — | Augusto Villa Founder & CEO | WordPressMySQLPHP+31 | 13 patents Microalgae cultivation systems and enriched biomass for sustainable agriculture and nutrition | 1 job opening |
| 23 | Telum Therapeutics Provider of the drug for treating multi-drug resistance bacterial infection | $5M | 54 mo ago | Series A | 17 | Rubén Díez CFO & Co-Founder - BoD member | — | 6 patents Recombinant lysin enzymes for treating gram‑negative bacterial infections | — |
| 24 | APRIA Systems Water treatment solution | $4M | 56 mo ago | Funding Raised | 9 | Pedro Manuel Gómez Rodríguez Ceo | WordPressMySQLPHP+27 | 10 patents Recirculating freshwater aquaculture systems for sustainable fish farming and water reuse | — |
| 25 | Onena Medicines. Developer of immunotherapies for the treatment of breast cancer | $4M | 31 mo ago | Series A | 10 | Maider Zabala Co-Founder | — | 5 patents Therapeutic antibodies targeting LEFTY signaling proteins | — |
| 26 | Wellness TechGroup Provides data intelligence software solutions | $4M | 67 mo ago | Series A | 61 | David Ternero Founder & CEO | — | — | — |
| 27 | AEInnova Offering solution to generate electricity from waste heat recovery systems | $4M | 30 mo ago | Series B | 19 | Raúl Aragonés Ortiz Founder | WordPressPleskMySQL+21 | — | 1 partnership · 1 award |
| 28 | Createch360º Provider of solutions for water treatment plant automation | $4M | 47 mo ago | Series A | 18 | Albert Mojal Co-Founder & President | WordPress Block EditorElementorWordPress+25 | — | — |
| 29 | Hysun Technology solution for hydrogen production | $4M | 8 mo ago | Series A | — | Tatiana Lopez Co-Founder | — | — | — |
| 30 | Wattwin Provider of project management software for renewable energy businesses | $3M | 15 mo ago | Series A | 85 | Joan Ferrer Co-Founder & CEO | WordPressApple iCloud MailMicrosoft 365+30 | — | — |
| 31 | Spherag Provider of IoT-based water management solutions | $3M | 46 mo ago | Series A | 20 | Jesus Ibanez Founder & CEO | WordPressMySQLPHP+25 | — | 1 partnership · 1 expansion |
| 32 | S&C SaaS-driven energy management solutions for commercial spaces | $3M | 61 mo ago | Funding Raised | — | Narcis Avellana Co-Founder & CEO | — | — | — |
| 33 | Adaion Developer of AI-driven software for electric grid operations and planning | $3M | 31 mo ago | Seed | — | Alfredo Rivela Co-Founder & CEO | — | — | — |
| 34 | Affirma Biotech Developer of drugs against multi-drug resistant bacteria | $2M | 28 mo ago | Seed | 3 | Maribel Berges Chief Executive Officer | — | 6 patents PD‑L1 immune checkpoint inhibitor small‑molecule therapeutics | — |
| 35 | Alerion Developer of fully automated drone solutions with a focus on high-performance embedded software for… | $2M | 32 mo ago | Seed | 25 | Oier Penagaricano Founder & CEO | WordPressMySQLPHP+23 | — | 1 launch |
| 36 | Evoltio Provider of energy management solutions combining expert analysis with proprietary technology | $2M | 12 mo ago | Seed | — | Jaime Rocabert Co-Founder | WebflowCloudflare TurnstileHSTS+9 | — | — |
| 37 | Clevergy Provider of building energy management solutions for commercial spaces | $2M | 8 mo ago | Series A | 7 | Beltran Aznar Co-Founder & CEO | WordPressMySQLPHP+26 | — | 1 partnership |
| 38 | 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 | 3 mo ago | Series A | 22 | Fernando De La Prida CEO | WordPressMySQLPHP+25 | 5 patents AI-driven modular real-time data processing frameworks for autonomous learning components | — |
| 39 | Sens Solutions IoT platform providing real-time air and water monitoring solutions 22Talent top 38%Funding bottom 47%Market bottom 37%Global bottom 36% All 5 signals ▾Talenttop 38% Fundingbottom 47% Marketbottom 37% Globalbottom 36% Techbottom 32% Talent: 2 named leaders on record · 2 C-suite/founder profiles curated Funding: Raised $1.8M across 2 rounds · 2 rounds over 8 yrs (0.2/yr) rank vs industry peers · Fliar Intelligence Index 22/100 | $2M | 13 mo ago | Seed | — | Marck Collado Co-Founder | — | — | — |
| 40 | Ocean Ecostructures Designs and implements Biodiversity Boosting Systems | $2M | 11 mo ago | Series A | 9 | — | WordPressMySQLPHP+21 | 4 patents Marine aquaculture devices and eco-friendly underwater construction materials | — |
| 41 | Humara Online platform offering waste management and recycling plant design software solutions | $1M | 1 mo ago | Seed | — | Laura Alvarez Co-Founder & CEO | — | — | 1 award |
| 42 | Ionly Manufacturer of lithium iron phosphate batteries for residential and industrial use | $1M | 2 mo ago | Seed | — | Alejandro Desco Co-Founder & CEO | WordPressMySQLPHP+24 | — | — |
| 43 | Candam Provider of recycling solutions using packaging recognition and fill-level sensor data 48AI top 20%Growth top 35%Talent top 38%Funding top 46% All 8 signals ▾AItop 20% Growthtop 35% Talenttop 38% Fundingtop 46% Techtop 50% Productbottom 45% Globalbottom 38% Marketbottom 23% AI: Classified as an AI company Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 48/100 | $1M | 4 mo ago | Seed | 22 | Miquel Solsona Co-Founder | WordPressMySQLPHP+27 | — | — |
| 44 | Dcycle Cloud based platform offering environmental business sustainability solutions | $1M | 18 mo ago | Series A | 25 | Jacobo Martín Co-Founder | Webflow EcommerceWebflowAmazon Web Services+25 | — | — |
| 45 | Agrow Analytics Provider of web and AI-based irrigation analytics solutions to farmers | $704K | 28 mo ago | Seed | 15 | Fernando Perruca Co-Founder | WordPressMySQLPHP+22 | — | 1 partnership |
| 46 | Manglai AI-powered carbon footprint management platform | $539K | 7 mo ago | Seed | — | Andres Cester Co-Founder & CEO | Cart FunctionalityTurbopackEmotion+22 | — | 1 partnership |
| 47 | inBiot Provider of IoT based indoor air quality monitoring solution for buildings | $535K | 24 mo ago | Seed | 17 | Maria Figols Co-Founder | WebflowYouTubelit-html+17 | — | 1 launch · 1 partnership |
| 48 | Zonox Energy tariff comparison and switching platform | $464K | 18 mo ago | Seed | — | Manuel Pinazo Co-Founder & CEO | PHPUbuntuBootstrap+16 | — | — |
| 49 | NanoChronia Provider of semiconductor gas sensor systems | $141K | 8 mo ago | Seed | — | Paul Brown Shute Co-Founder | — | — | 1 award |
| 50 | Quodus Provider of solutions for infrastructure monitoring and teaching analytics | $100K | 14 mo ago | Seed | — | Carlos Zaccaro Co-Founder | PythonTailwind CSSVue.js+7 | — | 1 partnership |
Top 12 Sustainability Tech companies in Spain
#1
Acquired · Gijon, Asturias · founded 2016 · 105 employees$119.6Mraised▾
A platform connecting multiple stakeholders in the solar industry. The platform brings together all these entities that go into the installation of a rooftop residential solar power project. The company utilizes big data, machine learning, and IoT to know user consumption patterns and photovoltaic potential which translates into the right-sizing of the project.
- Jan 2026Conventional Debt$119.6M
#2
Seed · Barcelona, Catalonia · founded 2016$8.2Mraised▾
Software technology for monitoring renewable energy products. It is a software technology company that specializes in providing AI based monitoring solutions for solar, wind, and hydro power plants. The software enables smart and predictable renewable energy production by predicting failures and optimizing performance.
- Mar 2026Seed$3.5M
- Jan 2024Seed$6.9M
- Apr 2021Seed$905.2K
- Feb 2019Seed$409.6K
#3
Series B · Barcelona, Catalonia · founded 2017 · 5 employees$11.8Mraised▾
Provider of solutions to convert waste into fuel. Its thermochemical conversion technology generates clean energy from waste feedstocks. The process takes place in a bubbling fluidized bed gasifier, where fuel and fluidizing agents react under auto thermal reduction conditions to generate synthesis gas. This gas is then treated by the WtEnergy-AS reforming process to remove all contaminants present in the residue.
- Feb 2026Series B$11.8M
- Dec 2022Series A—
#4
Series A · Barcelona, Catalonia · founded 2013 · 10 employees$7Mraised▾
Developer of a first-in-class oral drug improving embryo implantation. It offers a drug, OXO-001, to increase embryo implantation success and pregnancy rates. It addresses implantation failure or early pregnancy loss, major causes of failure in female fertility treatments. The company is also studying the use of OXO-001 to treat infertility associated with Polycystic ovary syndrome (PCOS).
- Feb 2026Grant (prize money)$3M
- Dec 2022Grant (prize money)$2.5M
- 2020Seed$1.4M
- Jun 2020Series A$5.7M
#5
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
#6
Seed · Ourense, Ourense · founded 2021$1.4Mraised▾
Online platform offering waste management and recycling plant design software solutions. The company claims that the software multiple simulations to adapt to each type of waste and calculates the parameters to automate the layout and control of your waste treatment.
- May 2026Seed$1.4M
#7
Series C · Barcelona, Catalonia · founded 2020 · 26 employees$35.5Mraised▾
Developer of diagnostic technology for rapid identification of sepsis-causing pathogens. The company focuses on empowering hospitals with technology to identify pathogens and antibiotic resistance markers directly from blood. The goal is to provide reportable results in about one hour, addressing the critical need for faster diagnosis. The company's technology aims to improve patient outcomes through early and effective treatment.
#8
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
#9
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
#10
Seed · Barcelona, Catalonia · founded 2017 · 22 employees$1.2Mraised▾
Provider of recycling solutions using packaging recognition and fill-level sensor data. The company offers recycling bins and rings that identify materials like PET bottles, metal cans, and glass. It combines scanning with acoustic AI detection for accuracy. The company aims to improve packaging recovery and waste collection.
- Feb 2026Seed—
- Oct 2024Seed$1.2M
- Aug 2022Grant (prize money)$613.2K
#11
Series A · Madrid, Community of Madrid · founded 2023$3.5Mraised▾
Technology solution for hydrogen production. It uses photo-thermo-catalyst and concentrated solar energy technology to create sustainable hydrogen.
- Oct 2025Series A$3.5M
- Jul 2024Seed—
#12
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
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Sustainability Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Climate Adaptation is moving in Spain
A read on the academic research around Climate Adaptation — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 234 Spain-affiliated papers.
- Universitat Politècnica de Catalunya17
- Barcelona Supercomputing Center15
- Universitat de Barcelona10
- Universitat Autònoma de Barcelona9
- Universidad Politécnica de Madrid9
- Climate change8
- Resilience (materials science)6
- Flood myth3
- Environmental planning2
- Psychological resilience2
- Flood myth1→15
- Psychological resilience1→11
- Climate resilience1→10
- Environmental resource management1→8
- Context (archaeology)3→7
- Climate change5→55
- Flood myth1→17
- Psychological resilience1→15
- Climate risk1→13
- Agriculture3→9
Where climate adaptation is researched across Spain
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.
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.