Best Sustainability Tech Companies in Dublin, Ireland
The 61 best Sustainability Tech companies in Dublin, Ireland in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: GC Aesthetics.
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 Dublin
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | GC Aesthetics Developer of silicone breast implants for breast reconstruction | $233M | 92 mo ago | 259 | Carlos Pinto Chief Executive Officer | Node.jsVuetifyGoogle Cloud+15 | Top 10M | — | — |
| 2 | Iterum Therapeutics Developer of antibiotics for MDR infections | $126M | 72 mo ago | 7 | — | HighstockBootstrapApache HTTP Server+12 | Top 5M | 37 patents Enhanced beta‑lactam antibiotic formulations with probenecid (and valproic acid) for improved pharmacokinetics. | — |
| 3 | UrbanVolt Offers lighting as a service solutions | $81M | 14 mo ago | 33 | Declan Barrett Founder & CCO | WordPressMySQLPHP+27 | Top 10M | — | — |
| 4 | Stream BioEnergy Developer of bioenergy projects | $73M | 61 mo ago | 22 | Kevin Fitzduff Managing Director | WordPressMySQLPHP+15 | Top 10M | — | 1 partnership |
| 5 | OpenHydro Tidal energy generation systems and grid control systems | $71M | 106 mo ago | 114 | — | — | — | 450 patents Hydroelectric turbine control, blade/coils design, and modular generator array integration. | — |
| 6 | Exergyn Waste Heat to energy converter | $35M | 53 mo ago | 36 | Kevin Toole Co-Founder & CTO | WordPressMySQLPHP+9 | Top 50M | 167 patents Advanced heat‑pump and thermodynamic cycles using SMA/NTE materials for efficient heat transfer | 2 expansions |
| 7 | HiberGene Developer of molecular diagnostic tests for detecting human infectious diseases | $14M | 74 mo ago | 12 | — | — | — | — | — |
| 8 | Cylon Provider of multi-site building energy management systems | $10M | 144 mo ago | 100 | — | — | — | — | — |
| 9 | XFuel Developer of low-carbon drop-in transport fuels from diverse waste streams | $8M | 5 mo ago | 16 | Nicholas Ball Co-Founder & CEO | WordPressMySQLPHP+27 | Top 10M | — | — |
| 10 | PrePayPower Pay-as-you-go electricity and gas retailer | $7M | 156 mo ago | 437 | Cathal Fay CEO | RubyTrixYouTube+17 | Top 500k | — | 5 job openings · 1 internship |
| 11 | AmbiSense Provider of AI-based autonomous gas monitoring technology | $6M | 58 mo ago | 20 | — | — | — | 13 patents Real-time ambient gas concentration and flow-rate sensing for air quality monitoring | — |
| 12 | Esave Corporation Connected battery management solution for grid connecticvity | $4M | 133 mo ago | 3 | Peter Haydon Founder & CEO | — | — | — | — |
| 13 | Wavebob WEC point absorber device | $2M | 189 mo ago | — | William Dick Founder | — | — | 44 patents Marine wave energy converters and resonance control technologies for offshore power generation | — |
| 14 | Incereb Paediatric, neonatal and fetal sensors for the neonatal intensive care and fetal brain monitoring | $2M | 99 mo ago | 6 | Jim Roche CEO | — | — | 5 patents EEG fetal monitoring electrodes and sensor systems | — |
| 15 | Openvolt API for smart meter data | $2M | 33 mo ago | — | Don O'Leary Co-Founder | — | — | — | — |
| 16 | NanobOx Provider of nanobubble water treatment equipment for increased bio-process sustainability | $1M | 33 mo ago | — | Mohammad Ghaani Co-Founder | WebflowjQueryHSTS+6 | Top 50M | 2 patents Nanobubble generation apparatus for enhanced fluid treatment and gas dissolution | — |
| 17 | Wattics Cloud based analytics solutions for monitoring appliances and equipments | $984K | 109 mo ago | 13 | — | — | — | — | — |
| 18 | SureWash Hand hygiene training and compliance measurement | $827K | 150 mo ago | 11 | — | WordPressMySQLPHP+29 | Top 10M | — | — |
| 19 | Lightly Technologies Provider of LED light source modules | $620K | 98 mo ago | — | Brian Charman Co-Founder | — | — | — | — |
| 20 | Carbon Harvesters Provider of carbon footprint management solutions | $155K | 37 mo ago | 2 | Luis Vergara Co-Founder | — | — | — | 1 partnership |
Top 12 Sustainability Tech companies in Dublin
#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
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
#4
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
#5
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
#6
Series B · Dublin, Leinster · founded 2009 · 22 employees$73.2Mraised▾
Developer of bioenergy projects
- Jun 2021Series B$73.2M
#7
Acqui-Hired · Dublin, Leinster · founded 2004 · 114 employees$71.1Mraised▾
OpenHydro, a DCNS company, specializing in the design, manufacture, installation and maintenance of marine turbines generating renewable energy from tidal streams. It offers a full turn-key tidal farm service, including the supply of Open-Centre Turbines, installation using patented barge deployment system, grid connection and maintenance. It deploys turbine arrays under the surface of the oceans to produce energy silently, invisibly and with no impact on the environment. It has tidal development projects in Ireland as well as internationally – UK, France & Canada.
- Sep 2017Grant (prize money)$9.3M
- Feb 2016PE$53M
- Jan 2011Series A$18.1M
#8
Deadpooled · Dublin, County Dublin · founded 2009 · 12 employees$14.3Mraised▾
Developer of molecular diagnostic tests for detecting human infectious diseases. The company has developed a device that uses LAMP (Loop-Mediated Isothermal Amplification) technology to detect Meningococcus, group B Streptococcus, C. difficile, Mycoplasma pneumonia, Pneumococcus, Meningococcus, and Influenza A & B. The company claims to develop and launch tests for RSV A & B Chlamydia & Gonorrhoea.
- Apr 2020Series B—
- Apr 2020Grant (prize money)$1.1M
- Feb 2020Grant (prize money)$698K
- Apr 2017Series B$7.1M
#9
Seed · Dublin, Leinster · founded 2023$1.6Mraised▾
API for smart meter data. It offers solutions to leverage data to conduct energy audits, monitor ongoing energy efficiency, identify the most appropriate tariff, and better manage properties.
#10
Deadpooled · Dublin, Leinster · founded 2014 · 20 employees$5.8Mraised▾
Provider of AI-based autonomous gas monitoring technology. Ambisense provides a solar-powered autonomous monitoring system for remote monitoring of environmental parameters. These monitoring systems upload the data collected on a periodic basis to the cloud, where it is analyzed. The continuous flow of data can be used to set up alerts or downstream processes in case of any dangerous or unwanted behaviour due to emissions of gases. It is used in establishments such as landfills, oil and gas sites, water treatment facilities and other biogas facilities.
- Aug 2021Series A$3.5M
- Jun 2019Seed$1.2M
- Apr 2017Seed$1.1M
#11
Seed · Dublin, Leinster · founded 2022$1Mraised▾
Provider of nanobubble water treatment equipment for increased bio-process sustainability. This equipment uses a low-voltage electric field to generate nanobubbles directly from dissolved gases in water, resulting in lower energy costs and reduced chemical usage. The technology enhances productivity and leads to cleaner water discharge, contributing to a higher gross margin and more resilient operations with a lower carbon footprint. The company offers equipment for both batch and continuous flow applications, supporting various industries. They also have an innovation partner program providing early access to new solutions.
- Oct 2023Seed$1M
#12
Acqui-Hired · Dublin, Leinster · founded 1985 · 100 employees$9.6Mraised▾
Cylon provides integrated building energy management systems. It designs hardware and software solutions to control, monitor and maintain building environment, maintaining occupant comfort, and more. The company offers 'Cylon Active Energy' - a SaaS-based building energy monitoring system that provides real-time information on energy usage and consumption in a building. Additionally, it also offers energy management tools with features such as charting, analysis, reports, monitoring & alarms, data collection, branding, and more. The company also collects data form wired & wireless sensors.
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
What Dublin researches in climate adaptation
University College Dublin, Trinity College Dublin, and Dublin City University dominate Dublin's climate-adaptation research, focusing primarily on flood risk and disaster resilience, with a cautiously concerned tone (18 concern vs. 9 advancement papers).
- University College Dublin14
- Trinity College Dublin9
- Dublin City University7
- Dublin Business School1
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.