Best Energy Efficiency Tech Companies in Portugal
The 33 best Energy Efficiency Tech companies in Portugal in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: CSide.
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 Portugal
| # | Company | Disclosed funding | Last round | Stage | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | AliveBuildings Provider of energy management software solutions | — | — | Unfunded | — | Pedro Domingues Founder & CEO | — | — | — |
| 2 | Bclose Solution provider in the areas of safety, health, wellness and energy | — | — | Unfunded | 2 | — | — | — | — |
| 3 | Bee2Solutions Provider of software and IoT solutions | — | — | Unfunded | — | Paulo Fernandes Co-Founder | — | — | — |
| 4 | Belmont Electronics Operator of an energy efficiency company. The company helps in the monitoring of the energy consumption using… | — | — | Deadpooled | 1 | — | — | — | — |
| 5 | buildONE Online energy and sustainability management platform | — | — | Unfunded | — | Helder Marques Co-Founder | — | — | — |
| 6 | Cloogy Energy management solutions with integration smart home appliances | — | — | Unfunded | — | James Napier CEO | — | — | — |
| 7 | Eggy Energy monitoring egg to save energy | — | — | Deadpooled | — | Pedro Ferreira Founder | — | — | — |
| 8 | IOplug Smart plugs to control electricity consumption | — | — | Deadpooled | — | Marzieh Bakhshandeh Co-Founder | — | — | — |
Top 12 Energy Efficiency Tech companies in Portugal
#1
Acquired · Coimbra, Coimbra District · founded 2020 · 119 employees$26.4Mraised▾
Provider of energy management software solutions for commercial and industrial applications. The product offerings include Kiplo - a virtual power plant that helps utilities address market imbalances, Cloggy - which provides household real-time actionable data about rates of consumption, generation, and storage, and Kisense - which provides energy optimization solutions.
#2
Seed · Porto, Porto District · founded 2017 · 10 employees$1.6Mraised▾
Provider of AI and cloud-based energy management systems for buildings. It takes inputs from users, regular sensors, building management systems, and financials from finance managers to analyze energy demand, leading to actionable insights to save energy.
- Aug 2024Seed$1.6M
#3
Series A · Mirandela, Braganca District · founded 2018 · 30 employees$5.2Mraised▾
Provider of energy monitoring system. It provides sensorless AI-powered Digital Twin technology and Dynamic Line Rating solutions for energy monitoring.
#4
Seed · Braga, Braga District · founded 2024$110.9Kraised▾
Energy market aggregator that automatically switch customers to energy provider
#5
Seed · Porto, Porto District · founded 2013 · 25 employees$3.4Mraised▾
Provider of cloud-based connected poles for public spaces. It offers self-powered light poles with in-built electric vehicle charging points, environment monitoring sensors, and surveillance cameras. Its features include a companion cloud platform for traffic monitoring, electric cycle docking capability, and usage of recyclable materials. It also offers IoT-enabled smart benches as public infrastructure.
- May 2022Grant (prize money)$150K
- Nov 2019Grant (prize money)$178K
- Jan 2019Seed$2.3M
- Jul 2015Grant (prize money)$54.8K
#6
Series B · Vila Nova de Gaia, Porto District · founded 2008 · 10 employees$35Mraised▾
Developer of software applications designed for customers to make a difference in emerging areas of value-added services in the commercial and residential segments. The company's applications include energy consumption management application, solar and wind energy, gas consumption management software and other related software, enabling customers to be offered with a wide range of innovative cloud-based technology to help in detection of energy consumption.
#7
Seed · Oeiras, Lisbon · founded 2012 · 9 employees$107Kraised▾
Watt Intelligent Solutions partner with utilities to provide tailored made energy efficiency reports delivered jointly with billing information for households and SME's. Their solutions include - identify and disaggregate the most significant energy uses in each household using smart metering data, peer comparison and benchmarking. Watt-IS was incubated at Building Global Innovators program
- Mar 2017Grant (prize money)$53.7K
- Dec 2016Grant (prize money)$53.3K
- Mar 2015Seed—
#8
Seed · Lisbon, Lisbon · founded 2009$161.5Kraised▾
Operator of water treatment management and energy assessment company intended to address water and energy saving and supply in buildings and other large facilities. The company provides a web-based platform for building utility management targeting large buildings and facilities to track, manage, and control electricity, water, and gas consumption. and also provides complete data that will be visible on a dashboard that can be accessed via smartphone or computer, enabling clients with all-in-one monitoring and management utility and helping them to track and manage electricity, water, and gas consumptions.
#9
Acquired · Vila Nova de Gaia, Porto District · founded 2009—raised▾
Provider of energy waste heat recovery solution. It offers shower drain heat recovery systems that lead to energy savings and reduce carbon footprint. It provides solutions for showering and reduces energy consumption.
#10
Funding Raised · Alges, Lisbon · founded 2016—raised▾
Hoterway provides solutions for water heating for the shower. Its shower technology instantly heats the cold water in the tubing and provides water with constant temperature throughout the shower.
- Jun 2020Grant (prize money)—
#11
Acquired · Porto, Porto District · founded 2008 · 22 employees—raised▾
Developer of energy management software catering to the energy industry. The company offers a package of applications to monitor and manage energy forecasts, weather forecasts, energy consumption, industrial production and building management, thereby helping its clients with energy systems optimization from the project to the installation of the energy systems and also the management of the assets in real-time, covering the value chain from top to bottom.
#12
Funding Raised · Coimbra, Coimbra District · founded 2013 · 2 employees—raised▾
Active Aerogels develops and manufactures aerogels for thermal insulation and filtration purposes which find application in markets like oil & gas, housing, space and waste water treatment. Their aerogels are available in form of panels, powder & beads, and spray-on. The company has customers like Henkel, Fixit, European Space Agency, CERN, Orbital Aerospace Systems etc.
Funding & investor landscape
Notable founders
How research on Energy Efficiency & Buildings is moving in Portugal
A read on the academic research around Energy Efficiency & Buildings — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 221 Portugal-affiliated papers.
- Polytechnic Institute of Porto41
- INESC TEC29
- Universidade do Porto27
- Institute for Systems Engineering and Computers21
- University of Coimbra19
- Renewable energy1→5
- Energy (signal processing)3→8
- Flexibility (engineering)1→6
- Heat exchanger3→8
- Heat pump5→10
- Electricity5→9
- Energy management3
- Energy management system2
- Vernacular architecture2
- Architecture2
- Electricity2
Where energy efficiency is researched across Portugal
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.