Best Sustainability Tech Companies in Ireland
The 159 best Sustainability Tech companies in Ireland in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Normax Biomed.
Ireland's Sustainability Tech sector is moving fast, and this directory ranks the best companies in it, ordered by disclosed equity funding and recent momentum across 159 tracked firms.
Normax Biomed leads the field at $303M, which is an outsider number given the rest of the pack, with UrbanVolt a distant but credible second at $81M. Total disclosed funding across the cohort sits at $1.4B, zero unicorns notwithstanding. That gap between the top earner and the field is worth asking about: what does it say about where capital is actually concentrating? Enterprise Ireland and the EIC Fund are the names appearing most consistently on cap tables, alongside Europa and AIB Seed Capital Fund. The sector's global tailwinds are real. According to ResearchAndMarkets.com, the global sustainability tech market grows from roughly $16.2B in 2022 to a projected $122.7B by 2032, a 23.8% CAGR driven by smart grid adoption and the low-carbon transition.
I'd flag that EV-adjacent themes, battery technology, next-gen platforms, drive system innovation, are where deal flow is thickest this quarter globally, and Ireland's cohort is positioned right in that current. Seed rounds closing fast in adjacent markets signal the appetite you'd expect before a regulatory framework catches up. Lack of formal green tech regulation remains a structural wildcard here, but if you're tracking where the smart money is moving in Ireland, this list is your starting point.
- 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 Ireland
| # | Company | Disclosed funding | Last round | Stage | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Normax Biomed Developer of mRNA vaccines for the treatment of infectious diseases | $303M | 47 mo ago | Series D | — | Peter Jensen CEO | — | — | — |
| 2 | GC Aesthetics Developer of silicone breast implants for breast reconstruction | $233M | 91 mo ago | Series E | 259 | Carlos Pinto Chief Executive Officer | Node.jsVuetifyGoogle Cloud+15 | — | — |
| 3 | AMCS Cloud based ERP software solutions for waste management and recycling industries | $224M | 97 mo ago | Series D | 86 | Doug Frank Mcnary Executive Director | UmbracoApple iCloud MailMicrosoft 365+12 | — | 2 job openings |
| 4 | Iterum Therapeutics Developer of antibiotics for MDR infections | $126M | 71 mo ago | Public | 7 | — | HighstockBootstrapApache HTTP Server+12 | 37 patents Enhanced beta‑lactam antibiotic formulations with probenecid (and valproic acid) for improved pharmacokinetics. | — |
| 5 | UrbanVolt Offers lighting as a service solutions | $81M | 13 mo ago | Series E | 33 | Declan Barrett Founder & CCO | WordPressMySQLPHP+27 | — | — |
| 6 | Stream BioEnergy Developer of bioenergy projects | $73M | 60 mo ago | Series B | 22 | Kevin Fitzduff Managing Director | WordPressMySQLPHP+15 | — | 1 partnership |
| 7 | OpenHydro Tidal energy generation systems and grid control systems | $71M | 105 mo ago | Acqui-Hired | 114 | — | — | 450 patents Hydroelectric turbine control, blade/coils design, and modular generator array integration. | — |
| 8 | Atlantic Therapeutics Developer of a non-invasive wearable device for pelvic floor strengthening and nerve stimulation products | $71M | 52 mo ago | Acquired | — | Susan Trent CEO | — | 20 patents Conductive circuits for peptide-based drug delivery systems. | — |
| 9 | Exergyn Waste Heat to energy converter | $35M | 52 mo ago | Series A | 36 | Kevin Toole Co-Founder & CTO | WordPressMySQLPHP+9 | 167 patents Advanced heat‑pump and thermodynamic cycles using SMA/NTE materials for efficient heat transfer | 2 expansions |
| 10 | CoolPlanet Provider of software to reduce carbon emissions | $31M | 76 mo ago | Series C | 300 | Alan Keogh CEO | HubSpot CMS HubApple iCloud MailGoogle Workspace+24 | — | — |
| 11 | Firecomms Manufacturer of optical networking equipment for smart grids | $17M | 209 mo ago | Acquired | 51 | — | YouTubeBootstrapAmazon Web Services+25 | 81 patents High‑performance optical receiver front‑end components and low‑noise transimpedance amplifiers | — |
| 12 | HiberGene Developer of molecular diagnostic tests for detecting human infectious diseases | $14M | 74 mo ago | Deadpooled | 12 | — | — | — | — |
| 13 | Oceanic Energy WEC based on oscillating water column principle | $11M | 13 mo ago | Funding Raised | — | Neil Lamerton CEO & MD | WordPressMySQLPHP+16 | — | — |
| 14 | VIOTAS Provider of smart grid and demand response technology | $11M | 12 mo ago | Funding Raised | 117 | — | WordPress Block EditorWordPressMySQL+22 | — | 1 job opening |
| 15 | Cylon Provider of multi-site building energy management systems | $10M | 143 mo ago | Acqui-Hired | 100 | — | — | — | — |
| 16 | Gaelectric Renewable Energy generation Company and storage system development | $9M | 96 mo ago | Deadpooled | 90 | Eamonn Mc Grath CEO | — | — | — |
| 17 | XFuel Developer of low-carbon drop-in transport fuels from diverse waste streams | $8M | 4 mo ago | Series A | 16 | Nicholas Ball Co-Founder & CEO | WordPressMySQLPHP+27 | — | — |
| 18 | NUA Surgical Developer of specialised surgical retractor to make C-Sections a safer | $7M | 18 mo ago | Series A | 5 | Barry McCann Co-Founder & CEO | GoDaddy Website BuilderGoogle MapsReact+10 | — | 1 internship · 2 awards |
| 19 | PrePayPower Pay-as-you-go electricity and gas retailer | $7M | 156 mo ago | Series A | 437 | Cathal Fay CEO | RubyTrixYouTube+17 | — | 5 job openings · 1 internship |
| 20 | AmbiSense Provider of AI-based autonomous gas monitoring technology | $6M | 57 mo ago | Deadpooled | 20 | — | — | 13 patents Real-time ambient gas concentration and flow-rate sensing for air quality monitoring | — |
| 21 | AVeta Medical Developer of a non-hormonal treatment for genitourinary syndrome of menopause. | $6M | 50 mo ago | Funding Raised | 5 | Paula Newell Founder & Director | — | — | — |
| 22 | Harp Renewables Manufacturer of biodigesters converting organic waste into biofertilizer | $5M | 65 mo ago | Acquired | 12 | — | WordPressMySQLPHP+28 | — | 1 launch |
| 23 | Metabolomic Diagnostics Diagnostics and prognostics for maternal health using metabolomics, | $4M | 64 mo ago | Seed | 13 | — | — | 39 patents Predictive diagnostics using metabolic and protein biomarkers for pregnancy complications | — |
| 24 | Esave Corporation Connected battery management solution for grid connecticvity | $4M | 132 mo ago | Deadpooled | 3 | Peter Haydon Founder & CEO | — | — | — |
| 25 | Positive Carbon Provider of automated food waste monitoring for food businesses | $3M | 31 mo ago | Seed | 12 | Mark Kirwan Co-Founder | WebflowYouTubeAmazon Web Services+12 | 2 patents Food waste monitoring systems using sensors and data analytics | — |
| 26 | Smart Efficient Light Control Provider of street lighting monitoring solutions | $3M | 192 mo ago | Acqui-Hired | 200 | — | — | — | — |
| 27 | Oxymem Membrane aerated biofilm reactor which supplies oxygen to micro organisms to consume carbon and nitrogen | $3M | 42 mo ago | Acquired | 60 | — | HubSpot CMS HubGSAPSnap.svg+15 | 55 patents Membrane aerated biofilm reactor mixing, air flow control, and compression sealing technologies | 1 expansion · 1 award |
| 28 | Westway Health Developer of non-antibiotic medicines for animal and human health applications | $3M | 84 mo ago | Funding Raised | — | Killian Briain Co-Founder | — | — | — |
| 29 | HaPPE Earth Provider of compostable PPE and waste management solutions for healthcare | $2M | 18 mo ago | Funding Raised | — | Lisa ORiordan Co-Founder | Cart FunctionalityWooCommerceWordPress+13 | — | — |
| 30 | Aquila Bioscience Provider of cell based assay services for preclinical research | $2M | 46 mo ago | Seed | 5 | Afshin Samali Co-Founder & Director | — | 8 patents Disinfection devices for agricultural produce and plant protection. | 1 internship |
| 31 | Wavebob WEC point absorber device | $2M | 188 mo ago | Deadpooled | — | William Dick Founder | — | 44 patents Marine wave energy converters and resonance control technologies for offshore power generation | — |
| 32 | SeaPower Provider of a wave attenuator | $2M | 128 mo ago | Funding Raised | — | — | — | — | — |
| 33 | Incereb Paediatric, neonatal and fetal sensors for the neonatal intensive care and fetal brain monitoring | $2M | 99 mo ago | Acqui-Hired | 6 | Jim Roche CEO | — | 5 patents EEG fetal monitoring electrodes and sensor systems | — |
| 34 | GKinetic Energy Provider of vertical axis turbine device for ocean currents, rivers, and canals | $2M | 64 mo ago | Seed | 6 | — | WordPress Block EditorWordPressMySQL+15 | 16 patents Wind turbine blade pitch mechanisms and water turbine assembly designs | — |
| 35 | Spark Works Edge computing based IoT platform | $2M | 65 mo ago | Funding Raised | — | Orestis Akrivopoulos CEO | WordPressMySQLPHP+24 | — | — |
| 36 | Climote Provider of heating control systems | $2M | 91 mo ago | Seed | 18 | Derek Roddy Co-Founder & CEO | OpenSSLBootstrapApache HTTP Server+10 | 31 patents Smart control of hot water storage tanks for heating systems using IoT and algorithms | — |
| 37 | GlowDx Developer of point-of-care diagnostics for infectious diseases | $2M | 70 mo ago | Seed | 16 | — | — | — | — |
| 38 | Openvolt API for smart meter data | $2M | 32 mo ago | Seed | — | Don O'Leary Co-Founder | — | — | — |
| 39 | Energy Reform Provider of power and energy system modelling and analysis services | $2M | 41 mo ago | Funding Raised | — | — | — | — | — |
| 40 | VT Electron Company provides grid monitoring solutions for grid operators | $1M | 122 mo ago | Seed | 12 | Mark Bannon Founder & CEO | — | — | — |
| 41 | Nektr Developer of an antimicrobial compound for infectious diseases | $1M | 61 mo ago | Deadpooled | 6 | Frank Boyle CEO | — | — | — |
| 42 | EpiSensor Sensor systems and gateway for demand response and energy management | $1M | 174 mo ago | Seed | 6 | Brendan Carroll Co-Founder & CEO | WordPressMySQLPHP+22 | — | — |
| 43 | BioProbe Diagnostics Nucleic Acid diagnostics for microbial detection and identification | $1M | 74 mo ago | Funding Raised | 6 | Ciaran Geoghegan Founder & CEO | — | — | — |
| 44 | NanobOx Provider of nanobubble water treatment equipment for increased bio-process sustainability | $1M | 32 mo ago | Seed | — | Mohammad Ghaani Co-Founder | WebflowjQueryHSTS+6 | 2 patents Nanobubble generation apparatus for enhanced fluid treatment and gas dissolution | — |
| 45 | Wattics Cloud based analytics solutions for monitoring appliances and equipments | $984K | 108 mo ago | Acqui-Hired | 13 | — | — | — | — |
| 46 | SureWash Hand hygiene training and compliance measurement | $827K | 150 mo ago | Seed | 11 | — | WordPressMySQLPHP+29 | — | — |
| 47 | ResourceKraft Data analytics for energy management | $808K | 193 mo ago | Seed | 20 | Liam Relihan Co-Founder & CEO | — | — | — |
| 48 | Lightly Technologies Provider of LED light source modules | $620K | 98 mo ago | Acqui-Hired | — | Brian Charman Co-Founder | — | — | — |
| 49 | CRDC Provider of plastic waste recycling solutions | $404K | 45 mo ago | Funding Raised | — | Donald Thomson Founder | WebflowGSAPLenis+16 | 23 patents Polymer-modified construction aggregates for enhanced concrete and building material performance | — |
| 50 | Carbon Harvesters Provider of carbon footprint management solutions | $155K | 36 mo ago | Funding Raised | 2 | Luis Vergara Co-Founder | — | — | 1 partnership |
Top 12 Sustainability Tech companies in Ireland
#1
Series A · Dublin, Leinster · founded 2010 · 16 employees$8.5Mraised▾
Developer of low-carbon drop-in transport fuels from diverse waste streams. It transforms waste into affordable low-carbon drop-in fuels. The company also pioneers sustainable carbon-negative fuels.
- Jan 2026Series A$20.1M
- Apr 2025Grant (prize money)$8.4M
- Jul 2022Series A$8.5M
#2
Series E · Dublin, Leinster · founded 2015 · 33 employees$80.5Mraised▾
UrbanVolt provides solutions for lighting as a service. It provides LED upgrade solutions that include capital investment, complete project management, and maintenance.
- May 2025Conventional Debt$45.2M
- Aug 2023Series E$28.3M
- Oct 2022Conventional Debt$29.6M
- May 2022Series D$6.3M
#3
Funding Raised · Limerick, County Limerick · founded 2013 · 117 employees$11.4Mraised▾
Provider of smart grid and demand response technology. It offers demand response solutions that allows commercial and industrial operations to earn revenue by participating in the electricity market.
- May 2025Conventional Debt$11.4M
#4
Funding Raised · Cobh, County Cork · founded 2005$11.4Mraised▾
WEC based on oscillating water column principle. It has only one moving part and the mooring system holds the OE Buoy in position and is key to its survivability in the gale-force winds and extreme sea states. The turbine captures the energy of the wave and the generator converts this energy to electrical power.
- Apr 2025Grant (prize money)$11.4M
#5
Series A · Galway, Connaught · founded 2018 · 5 employees$7Mraised▾
Developer of the specialized surgical retractor to make C-Sections safer. The company's inaugural surgical device is focusing on caesarean section (C-Section) and to improve the ergonomics of the surgery and reduce the risk of surgical complications.
- Dec 2024Series A$6.9M
- Dec 2020Grant (prize money)$120K
- Jun 2020Grant (prize money)—
#6
Series D · Cork, Munster · founded 2022$302.6Mraised▾
Developer of mRNA vaccines for the treatment of infectious diseases. The company has "Vax Factory" for the construction of mRNA vaccines to treat infectious diseases such as COVID, Tuberculosis, HIV, and Malaria.
- Jul 2022Series D$302.6M
#7
Funding Raised · Cork, Munster · founded 2021$2.5Mraised▾
Provider of compostable PPE and waste management solutions for healthcare. It facilitates the transition from single-use plastics to compostable alternatives. The company offers an on-site bio-digestion system that converts bio-PPE and food waste into fertilizer. Real-time data monitoring tracks waste reduction and sustainability progress. Services include onboarding, software integration, bio-digestion management, data analytics, and technical support. This tailored approach helps healthcare providers meet sustainability goals and reduce costs.
- Dec 2024Grant (prize money)$2.5M
#8
Series E · Dublin, County Dublin · founded 2007 · 259 employees$232.8Mraised▾
Developer of silicone breast implants for breast reconstruction. The company offers breast implants and related products under the brands Nagor and Eurosilicone for Aesthetic Breast Surgery and Breast Reconstruction. It also, offer a platform to find surgeons for breast surgeries.
- Oct 2018Series E$97M
- Oct 2018Conventional Debt—
- Aug 2018Series D$7.5M
- Aug 2017Series D$16.2M
#9
Series D · Limerick, County Limerick · founded 2003 · 86 employees$224.3Mraised▾
Cloud based ERP software solutions for waste management and recycling industries. It provides various solutions for contract pricing and invoicing, subcontractor management, billing, route optimization, fleet tracking, real-time planning, and others. Offers a mobile application for on-field sales personnel, and truck drivers, and a web portal for customers. It also provides dynamic and static weighbridge solutions consisting of patented algorithms for waste weighing operations and caters to waste recycling, construction, and oil and gas industries.
- Apr 2018Series D$121.3M
- Aug 2015Series C$51.2M
- Jul 2014Series B$11.2M
- Jan 2014Series B$31.9M
#10
Acquired · Oranmore, County Galway · founded 2013$70.6Mraised▾
Developer of a non-invasive wearable device for pelvic floor strengthening and nerve stimulation products. The device is wearable apparel similar to cycling shorts which apply electrical muscle stimulation (EMS) to provide pelvic floor contractions to the muscles during the exercise session. The device can be controlled by a hand-held controller to alter the intensities of the simulations. The technology provides exercises to manage stress, restore pelvic floor strength and treat incontinence by controlling the muscles required for bladder function.
- Jan 2022Series B$20.4M
- Feb 2021Series B$2.4M
- Apr 2019Grant (prize money)$168.5K
- Jan 2019Series B$31.9M
#11
Public · Dublin, Leinster · founded 2015 · 7 employees$125.7Mraised▾
Developer of antibiotics for MDR infections. Its first product is a novel anti-infective substance, Sulopenem, that has shown in-vitro activity against a variety of gram-negative, gram-positive, and anaerobic bacteria that resist other antibiotics. The product pipeline includes Sulopenem etzadroxil - probenecid to treat UTI and cUTI, Sulopenem for cUTI, and complicated intra-abdominal infections.
- Jul 2020Post IPO$2.8M
- Jun 2020Post IPO$2.8M
- Jan 2020Post IPO$52M
- Mar 2018Series B$78.1M
#12
Series A · Dublin, Leinster · founded 2012 · 36 employees$35.1Mraised▾
Waste Heat to energy converter. It offers a form of waste heat exchanger which helps in converting low-grade waste heat LGWH into a usable form. The technology is particularly suited to industrial applications like combined heat power, biogas, cargo shipping, and more.
- Jan 2022Series A$35M
- May 2017Grant (prize money)$2.8M
- Jun 2015Grant (prize money)$2.7M
- May 2015Grant (prize money)$2.8M
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 flat · growth flat
How research on Climate Adaptation is moving in Ireland
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 77 Ireland-affiliated papers.
- University College Dublin14
- Environmental Protection Agency9
- Trinity College Dublin9
- Ollscoil na Gaillimhe – University of Galway7
- Dublin City University7
- Climate change3
- Flood myth2
- Context (archaeology)2
- Climate resilience2
- Climate model2
- Flood myth1→8
- Climate change1→4
- Climate change2→22
- Resilience (materials science)3→8
- Adaptation (eye)1→5
Where climate adaptation is researched across Ireland
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.