Best Environment Tech Companies in Dublin, Ireland
The 50 best Environment Tech companies in Dublin, Ireland in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: UrbanVolt.
Our analysis of 241 Environment Tech companies
$25.6b in tracked funding; 88% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Environment Tech companies in Dublin
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | UrbanVolt Offers lighting as a service solutions | $81M | 15 mo ago | Series E | Declan Barrett Founder & CCO | 2015 | WordPressMySQLPHP+27 | — | — |
| 2 | Stream BioEnergy Developer of bioenergy projects | $73M | 62 mo ago | Series B | Kevin Fitzduff Managing Director | 2009 | WordPressMySQLPHP+15 | — | 1 partnership |
| 3 | OpenHydro Tidal energy generation systems and grid control systems | $71M | 107 mo ago | Acqui-Hired | — | 2004 | — | 442 patents Control and integration of hydroelectric turbine systems and generator arrays for tidal/river power | — |
| 4 | Exergyn Waste Heat to energy converter | $35M | 54 mo ago | Series A | Kevin Toole Co-Founder & CTO | 2012 | WordPressMySQLPHP+9 | 167 patents Solid-state heat pump cycles using SMA/NTE bundles for efficient heat transfer. | 2 expansions |
| 5 | Cylon Provider of multi-site building energy management systems | $10M | 145 mo ago | Acqui-Hired | — | 1985 | — | — | — |
| 6 | XFuel Developer of low-carbon drop-in transport fuels from diverse waste streams | $8M | 6 mo ago | Series A | Nicholas Ball Co-Founder & CEO | 2010 | WordPressMySQLPHP+27 | — | — |
| 7 | PrePayPower Pay-as-you-go electricity and gas retailer | $7M | 157 mo ago | Series A | Cathal Fay CEO | 2009 | RubyTrixYouTube+17 | — | 5 job openings · 1 internship |
| 8 | AmbiSense Provider of AI-based autonomous gas monitoring technology | $6M | 59 mo ago | Deadpooled | — | 2014 | — | 13 patents Environmental gas sensing and air‑quality monitoring, focusing on ground‑gas concentration and flow measurement. | — |
| 9 | Esave Corporation Connected battery management solution for grid connecticvity | $4M | 134 mo ago | Deadpooled | Peter Haydon Founder & CEO | 2012 | — | — | — |
| 10 | Wavebob WEC point absorber device | $2M | 190 mo ago | Deadpooled | William Dick Founder | 1999 | — | 43 patents Wave energy conversion systems and parametric resonance control for marine power generation | — |
| 11 | Openvolt API for smart meter data | $2M | 34 mo ago | Seed | Don O'Leary Co-Founder | 2023 | — | — | — |
| 12 | NanobOx Provider of nanobubble water treatment equipment for increased bio-process sustainability | $1M | 34 mo ago | Seed | Mohammad Ghaani Co-Founder | 2022 | WebflowjQueryHSTS+6 | 2 patents Nanobubble generation devices for water treatment and industrial processes | — |
| 13 | Wattics Cloud based analytics solutions for monitoring appliances and equipments | $984K | 110 mo ago | Acqui-Hired | — | 2011 | — | — | — |
| 14 | SureWash Hand hygiene training and compliance measurement | $827K | 151 mo ago | Seed | — | 2011 | WordPressMySQLPHP+29 | — | — |
| 15 | Lightly Technologies Provider of LED light source modules | $620K | 99 mo ago | Acqui-Hired | Brian Charman Co-Founder | 2016 | — | — | — |
| 16 | Carbon Harvesters Provider of carbon footprint management solutions | $155K | 38 mo ago | Funding Raised | Luis Vergara Co-Founder | 2020 | — | — | 1 partnership |
Top 12 Environment Tech companies in Dublin
#1
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
#2
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
#3
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
#4
Series B · Dublin, Leinster · founded 2009 · 22 employees$73.2Mraised▾
Developer of bioenergy projects
- Jun 2021Series B$73.2M
#5
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
#6
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.
#7
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
#8
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
#9
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.
#10
Series A · Dublin, Leinster · founded 2009 · 437 employees$6.6Mraised▾
Pay-as-you-go electricity and gas retailer. The company provides electricity and gas on a pay-as-you-go basis. The company provides its customers with a meter and a smartphone app. The users can top-up the electricity using the app. The app provides information on energy usage and pricing.
- Jun 2013Series A$6.6M
#11
Deadpooled · Dublin, Leinster · founded 2012 · 3 employees$3.8Mraised▾
Esave is a Hybrid Energy Storage System that combines power electronics, flywheel and battery technologies. It delivers a scalable millisecond to hours energy storage solution that quickly stabilizes voltage, improves power quality and adds energy capacity to address the challenges of integrating wind and solar energy onto the grid. The power dense flywheel technology provides millisecond response and power quality capabilities that are crucial for ‘grid balancing’ ancillary services. It delivers fast response ancillary services for Dynamic Reactive Response, Fast Post-Fault Active Power, Fast Frequency Response, Synchronous Inertial Response and Primary Operating Reserve.
- May 2015Grant (prize money)$54.9K
- Mar 2015Grant (prize money)$55.8K
- Dec 2014Grant (prize money)$3.7M
- 2014Seed—
#12
Deadpooled · Dublin, Leinster · founded 1999$2.4Mraised▾
Wavebob is a wave energy technology company, engages in converting ocean wave energy to electricity. It develops Wavebob, a wave energy converter, which is a floating buoy device (point absorber) that automatically adjust its response to suit the prevailing wave and deployed in large arrays offshore. The device oscillates and resonates in time with a particular wave climate as its center is a patented “neutrally buoyant mass of water” in a cylinder. In 2013, Wavebob was shut down after failing to raise money.
- Sep 2010Grant (prize money)$2.4M
- 2010Series A$2.4M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Environment Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding flat · growth flat
How research on Environmental Monitoring in Dublin is moving
A read on the academic research around Environmental Monitoring in Dublin — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 76 papers.
- Dublin City University34
- University College Dublin21
- Trinity College Dublin18
- Technological University Dublin5
- Royal Dublin Society3
- Greenhouse gas2
- Software deployment2
- Methane1
- Bespoke1
- Web application1
- Water quality1→11
- Sediment1→8
- Wireless sensor network6
- Environmental data5
- Data quality4
- Remote sensing3
- Environmental resource management3
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.