Best Energy Efficiency Tech Companies in Sweden
The 118 best Energy Efficiency Tech companies in Sweden in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Polarium.
Polarium's $274 million in disclosed funding tells you something about what Sweden's Energy Efficiency Tech sector has become. Our directory tracks 118 companies here, with $741 million in total disclosed funding across the field, and one unicorn already in the mix. Aira sits at $159 million, Greenely at $16 million, and even earlier-stage players like Enjay and DREM are pulling institutional backing from names like Almi Invest, the EIC Fund, and the Swedish Energy Agency. That's not a cottage industry. It's a capital stack with real weight behind it.
So what's driving the momentum? App-layer data shows median install growth of roughly 28% year-over-year across energy-adjacent platforms, which I'd read as a demand signal, not a coincidence. Hot themes right now are EV battery technology, solar electricity generation, and next-generation EV platforms, and Sweden's regulatory environment, with its aggressive decarbonization targets, keeps accelerating the investment case. If you're mapping this space, the funding concentration is worth noting: Polarium alone accounts for nearly 37% of total disclosed capital, which means the long tail of 116 other companies is genuinely underfollowed. That's where the next big number is probably hiding.
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 Sweden
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Market signals (1y) | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Polarium 🦄 Developer of battery management systems and energy storage hardware solutions | $274M | 20 mo ago | 550 | Stefan Jansson Founder | WordPressApple iCloud MailMicrosoft 365+32 | — | — | 1 partnership |
| 2 | Tibber Provider of a digital platform for electricity consumption management and insights | $177M | 51 mo ago | 61 | Edgeir Aksnes Co-Founder & CEO | Apple iCloud MailGoogle WorkspaceBootstrap+21 | — | — | 1 job opening · 5 partnerships |
| 3 | Aira Provider of heat pumps solution for energy efficiency | $159M | 10 mo ago | — | Martin Lewerth CEO | Apple iCloud MailMicrosoft 365Node.js+20 | — | — | 1 launch · 1 partnership · 1 award |
| 4 | Minut Developer of security sensor for residential buildings | $31M | 30 mo ago | 46 | — | WebflowApple iCloud MailGoogle Workspace+20 | — | 12 patents Sensor replacement and audio event detection for IoT and communication networks | 2 launchs · 2 partnerships |
| 5 | Eliq Provider of energy monitoring solution | $21M | 31 mo ago | 53 | Joakim Sandnes Co-Founder | WordPressMySQLPHP+18 | — | — | — |
| 6 | Greenely Provider of an application that connects and optimizes home energy consumption | $16M | 22 mo ago | — | Fredrik Hagblom Co-Founder & Head Of Operations | WebflowSentryAmazon Web Services+15 | — | — | 1 partnership |
| 7 | ZeroPoint Technologies Provider of energy consumption management system | $12M | 24 mo ago | 21 | Per Stenstrom Co-Founder | Node.jsVimeoTailwind CSS+17 | — | — | — |
| 8 | ChromoGenics Manufacturer of smart glass for energy efficiency | $7M | 74 mo ago | 31 | Greger Gregard Co-Founder & CTO | WordPressMySQLPHP+23 | — | 72 patents Tunable optical interlayers for displays and edge-protection structures for laminated glass. | 2 launchs · 2 expansions · 1 award |
| 9 | Greenbyte Renewable energy generation monitoring solution provider | $6M | 98 mo ago | 91 | Julieann Rainville CEO | — | — | — | — |
| 10 | Myrspoven Provider of AI-driven energy optimization solutions for commercial buildings | $6M | 28 mo ago | 47 | Anders Kallebo Co-Founder & CEO | WordPressMySQLPHP+22 | — | — | 1 launch |
| 11 | DREM Installer of air-water, air-air, exhaust air, and geothermal heat pumps | $5M | 19 mo ago | 16 | Hannes Palm COO and Co-founder | TypeScriptGraphQLGoogle Maps+19 | — | — | — |
| 12 | Heliospectra Developer of LED lighting and control systems for horticulture applications | $4M | 114 mo ago | 15 | Bonny Heeren CEO | WordPress Block EditorWordPressMySQL+28 | 13 signals ▲1200% Earnings · Leadership | 50 patents Precision indoor horticulture lighting and environmental control systems for plant growth | — |
| 13 | Watty Energy usage data analytics for smart homes and buildings | $4M | 119 mo ago | 11 | — | — | — | — | — |
| 14 | Sensative Door and window position sensors for homes | $3M | 68 mo ago | 36 | Mats Pettersson Co-founder & CTO | WordPressMySQLPHP+30 | — | 22 patents Capacitive fluid/oil level sensing and wireless IoT sensor modules for structural and glass monitoring | 1 launch |
| 15 | Avidicare Provider of ventilation systems designed for infection control in healthcare | $3M | 13 mo ago | — | Peter Hojerback CEO | WordPress Block EditorWordPressMySQL+20 | — | 23 patents Cleanroom and medical air supply/ventilation system design and control | — |
| 16 | Hemma Provider of real-time energy performance data platform | $2M | 35 mo ago | — | Therese Ruth Founder & CEO | — | — | — | — |
| 17 | Svenska Aerogel Manufacturer of aerogel material, Quartzene, for thermal insulation and fire resistance | $2M | 97 mo ago | 16 16 → 20 (+25%) | Tor Einar Norbakk CEO | WordPressMySQLPHP+29 | — | 47 patents Patents concentrated in transport & manufacturing processes | 1 launch |
| 18 | Ngenic Smart thermostat for homes | $2M | 121 mo ago | 64 | Bjorn Berg CEO & MD | Cart FunctionalityWordPressMySQL+22 | — | 2 patents Remote external control systems for residential heating and HVAC automation | — |
| 19 | SenseNode Cloud-based Industrial energy management system with wireless sensors | $2M | 43 mo ago | 20 | Erik Andersson CEO | WordPressMySQLPHP+26 | — | — | — |
| 20 | Plejd Provider of smart lighting control systems for homes | $1M | 111 mo ago | 187 | Babak Esfahani Co-Founder & CEO | RubyAnimate.cssTailwind CSS+15 | — | 45 patents Smart IoT lighting and shading control modules for automated home and commercial illumination | 2 launchs |
| 21 | Airwatergreen Dehumidification and air treatment solution | $965K | 121 mo ago | 11 | — | WordPressMySQLPHP+29 | — | 48 patents Air stream temperature and humidity control for HVAC and industrial drying systems | — |
| 22 | Enjay Produces energy from waste gas of restaurant ventilation | $935K | 9 mo ago | 19 | Nils Lekeberg Founder | — | — | 28 patents Battery-powered and self-cleaning ventilation system components for HVAC applications | — |
| 23 | Telcred Provides NFC based access control | $727K | 133 mo ago | 6 | Carlo Pompili CEO | — | — | 4 patents Physical access control hardware and management systems for secure entry | — |
| 24 | Climeon Provider of SaaS-driven industrial and geothermal waste heat recovery products | $514K | 60 mo ago | 37 | Thomas Ostrom Founder & CEO | WordPress Block EditorBeaver BuilderWordPress+27 | 3 signals ▲200% Contracts | 109 patents Low‑temperature heat‑to‑electric conversion systems with pumps, condensers, and plate heat exchangers. | — |
| 25 | Egain Energy monitoring platform provider | $506K | 68 mo ago | — | Thorbjorn Geiser Founder | — | — | — | — |
| 26 | Enersize Compressed air efficiency management solutions for industries and plants | $434K | 111 mo ago | 3 | Johan Olson CEO | HubSpot CMS HubAmazon Web Servicescore-js+13 | 3 signals Earnings | — | — |
| 27 | NODA SaaS-driven energy management solution for commercial spaces | $188K | 12 mo ago | 11 | Tatiana Brandt Chief Executive Officer | — | — | — | — |
| 28 | Greinon Provider of lighting control systems | $115K | 102 mo ago | — | Tatyana Kolyaka Co-Founder | — | — | — | — |
| 29 | Sally R IoT & cloud-based energy-efficient ventilation solutions | $114K | 90 mo ago | 19 | Viktor Kjellberg Co-founder | — | — | 23 patents Indoor air purification and conditioning systems for enclosed environments | — |
Top 12 Energy Efficiency Tech companies in Sweden
#1
Series C · Stockholm, Stockholm County · founded 2022$158.8Mraised▾
Provider of heat pumps solution for energy efficiency. It offers air-source heat pumps for residential heating. It delivers innovative and affordable clean energy-tech solutions to accelerate the electrification of residential heating.
- Aug 2025Series C$174.6M
- Jun 2024Conventional Debt$217.3M
- Jan 2024Series B$158.8M
#2
Polarium 🦄Series D · Stockholm, Stockholm County · founded 2015 · 550 employees$273.6Mraised▾
Developer of battery management systems and energy storage hardware solutions. These products facilitate energy storage for residential, commercial, industrial, and telecommunications applications. The hardware integrates with software to manage power availability, optimize energy consumption, and support grid stability. The systems enable users to store energy for reserve power, reduce costs through peak shaving, and participate in energy markets. The technology supports the integration of renewable energy sources by providing scalable storage capacity for various infrastructure requirements.
#3
Seed · Malmo, Skane County · founded 2015 · 19 employees$934.7Kraised▾
Enjay is a developer of a technology that produces energy from waste gas of restaurant ventilation. It installs an energy recovery system called Lepido into the restaurant's ventilation system. Claims to increase energy efficiency and reduce the carbon footprint of the restaurant buildings.
- Sep 2025Seed$822.4K
- May 2019Grant (prize money)$55.7K
- Dec 2018Grant (prize money)$56.6K
#4
Seed · Lund, Skane County · founded 2010$2.6Mraised▾
Provider of ventilation systems designed for infection control in healthcare. The company offers systems adaptable to environments requiring clean air and zones. It provides solutions aligned with energy efficiency and expertise. The company also delivers service solutions and digital monitoring systems.
- May 2025Seed$308.8K
- Feb 2015Seed$2.6M
#5
Series A · Stockholm, Stockholm County · founded 2014$15.8Mraised▾
Provider of an application that connects and optimizes home energy consumption. The application enables users to monitor electricity usage in real-time and control connected devices. It also allows users to sell surplus energy back to the grid. The application aims to help households reduce energy costs and promote sustainable energy practices.
- Jul 2024Series A$8.7M
- Oct 2023Seed—
- Jun 2022Seed$2.1M
- Jul 2021Seed$2.2M
#6
Seed · Stockholm, Stockholm County · founded 2022 · 16 employees$4.9Mraised▾
Installer of air-water, air-air, exhaust air, and geothermal heat pumps. The company provides comprehensive solutions for the purchase and installation of heat pumps. Certified installers handle everything from installation to removal. Maintenance service agreements are available to ensure optimal performance and extend the lifespan of heat pumps.
- Nov 2024Seed$1.1M
- Aug 2023Seed$2.2M
- Jan 2023Seed$2.7M
#7
Acquired · Karlshamn, Blekinge County · founded 2005 · 11 employees$188.2Kraised▾
SaaS-driven energy management solution for commercial spaces. Their intelligent energy systems can handle big data from a range of customers to optimize the peak load for district heating. For buildings, using real-time data from different building sources, such as indoor temperature and current energy usage.
- 2025Seed—
- Sep 2023Grant (prize money)$219.2K
- Jun 2021Grant (prize money)$27.7K
- Jun 2021Seed$247K
#8
Series B · Malmo, Skane County · founded 2014 · 46 employees$30.7Mraised▾
Developer of security sensors for residential buildings. It can detect motion, glass break, temperature, humidity, mould, light, and noise. It can also recognize other alarms, and notify users when the existing smoke or CO detector goes off. Additionally, it comes with tamper protection and a built-in siren, for scaring away intruders. Point connects to phone over Wi-Fi or Bluetooth and can interface with Google Assistant or another IFTTT compatible smart home device.
- Dec 2023Series B$5M
- Mar 2022Series B$14M
- Apr 2019Series A$8M
- Feb 2019Grant (prize money)$56.9K
#9
Series A · Gothenburg, Vastra Gotaland County · founded 2016 · 21 employees$11.8Mraised▾
Provider of energy consumption management system. It provides memory compression technologies that combine fast data compression with real-time data compaction and transparent memory management to deliver higher performance per watt for servers and embedded products. It aims to reduce energy consumption in data centers and improve overall efficiency.
- May 2024Series A$5.4M
- Feb 2023Seed$3.4M
- Jan 2023Grant (prize money)$539K
- Oct 2021Grant (prize money)$57.8K
#10
Series C · Stockholm, Stockholm County · founded 2016 · 61 employees$177Mraised▾
Provider of a digital platform for electricity consumption management and insights. The platform offers tools and information to empower end customers. It aims to make energy technology accessible. The company seeks specialists in technology and other fields.
- Mar 2022Series C$100M
- Nov 2020Conventional Debt—
- Nov 2020Series B$65M
- Mar 2019Series A$12M
#11
Series B · Gothenburg, Vastra Gotaland County · founded 2010 · 53 employees$20.9Mraised▾
Provider of energy monitoring solution. It analyses billions of energy data points using machine learning analytics and extract insights giving customers control of their consumption, and inspiring them to take part in the energy transition.
#12
Series A · Stockholm, Stockholm County · founded 2017 · 47 employees$5.8Mraised▾
Provider of AI-driven energy optimization solutions for commercial buildings. It offers solutions that optimize heating, cooling, and ventilation using AI and engineering insights. The system is designed as a retrofit to improve energy efficiency. It provides add-on services for spot price optimization and power load reduction, utilizing building's capacity to store heat or cold. The solutions focus on reducing energy consumption, lowering operational costs, and aligning with sustainability goals and regulatory compliance.
- Feb 2024Series A$5.8M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy Efficiency Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.