Best Energy Efficiency Tech Companies in Stockholm County, Sweden
The 35 best Energy Efficiency Tech companies in Stockholm County, Sweden in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Polarium.
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 Stockholm County
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Aura Light B2B lighting solutions provider | — | — | 200 | Henrik Hakansson CEO | VarnishCloudflareMicrosoft Advertising+14 | Top 5M | 2 patents Modular architectural lighting fixtures and installation systems | 1 expansion |
| 2 | Blueflow Provider of energy management system for the maritime industry | — | — | — | Peter Knudsen CEO | — | — | — | 1 partnership |
| 3 | ClimaCheck HVAC diagnostic tool | — | — | — | Klas Berglöf Head of R&D and Founder | — | — | — | — |
| 4 | Cosafe Provider of application for public safety management | — | — | — | Alexis Nicou Co-Founder & CEO | WordPressMySQLPHP+36 | Top 5M | — | — |
| 5 | Dibz Provider of digital housing queue solutions for rental management systems | — | — | 8 | — | SentryNode.jsTailwind CSS+15 | Top 5M | — | — |
| 6 | Dinbox Provider of cloud-enabled smart digital property boxes | — | — | — | Emma Pettersson CEO | WordPress Block EditorWordPressMySQL+28 | Top 10M | — | — |
| 7 | DPP Dynamo Power & Process SaaS-driven energy monitoring solutions for commercial spaces | — | — | — | Fredrik Gustavsson Founder | — | — | — | — |
| 8 | Dunderon Multisite Heating control platform | — | — | — | Joakim Kviberg CEO | — | — | — | — |
Top 12 Energy Efficiency Tech companies in Stockholm County
#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 · 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
#4
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
#5
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
#6
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
#7
Seed · Stockholm, Stockholm County · founded 2018$2.5Mraised▾
Provider of real-time energy performance data platform. It aims to drive home energy transition at scale by providing real-time energy performance data to businesses. It helps close the data gap and enable businesses to make informed decisions about their energy usage.
- Jul 2023Conventional Debt$924.8K
- Jun 2021Grant (prize money)$21.3K
- Jun 2021Grant (prize money)$214.3K
- Oct 2020Seed$2.2M
#8
Acquired · Stockholm, Stockholm County · founded 2013 · 11 employees$4.5Mraised▾
Energy usage data analytics for smart homes and buildings. Provides a energy management product which gives data about the usage of energy by various appliances in the building. Uses machine learning to understand which are the major energy consuming areas and gives suggestions for smart energy usage using machine learning.
- Jul 2016Series A$3.3M
- Jul 2016Grant (prize money)—
- Oct 2015Grant (prize money)$55K
- May 2015Grant (prize money)$56K
#9
Seed · Stockholm, Stockholm County · founded 2011 · 37 employees$514.4Kraised▾
Provider of SaaS-driven industrial and geothermal waste heat recovery products. The solution can be installed in heat ventilation sites, geothermal geysers, and other devices. Also, provides SaaS-based software to control and monitor heat power systems.
- Jun 2021Grant (prize money)$514.4K
- 2015Seed—
#10
Seed · Stockholm, Stockholm County · founded 2009 · 6 employees$726.9Kraised▾
Telcred provides offline physical access control systems based on NFC and security based on PKI (Public Key Infrastructure). Its solution is based on technology that Time-limited “digital keys” are sent to an NFC phone or a contactless smart card, which can then be used to gain access. The company is a spinoff from SICS, Swedish Institute of Computer Science. Its solutions find applications primarily in infrastructure companies such as telecom operators, power companies, and operators of public transportation.
- May 2015Seed$316.2K
- Nov 2011Seed$339.6K
- Dec 2010Seed$71.1K
#11
Funding Raised · Stocksund, Stockholm County · founded 2015 · 2 employees$29.4Kraised▾
Provider of active printed light technology for safety garments and accessories. The company mainly offers plug-and-play printed active light integration kit for garments, energy-efficient light panels that generate no heat and can be printed in any shape, and customized printed active light garments.
- Dec 2020Grant (prize money)$29.4K
#12
Deadpooled · Stockholm, Stockholm County · founded 2014$34Kraised▾
LuminGo is a spin-off venture from renewable energy company Pamoja Cleantech. Their smart grid solution integrates Power Management Units (PMU) in the overall electricity grid management using IoT. They have developed fourth generation SCADA system to monitor and control high and low voltage lines of the electricity distribution infrastructure through the telecommunication network. Their software integrates individual smart battery systems into the overall electricity grid management which adds stability and prevent power outages in unreliable grids. It is backed by Startup Wise Guys accelerator and SpeedUP! Europe.
- 2015Seed$34K
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
How research on Energy Efficiency & Buildings is moving in Sweden
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 269 Sweden-affiliated papers.
- KTH Royal Institute of Technology100
- Chalmers University of Technology35
- Mälardalen University27
- Lund University25
- Uppsala University13
- Heat pump3→13
- Flexibility (engineering)1→5
- Thermal energy storage2→4
- Heat pump18→37
- Energy management3→16
- Photovoltaic system1→11
- Thermal energy storage4→13
- Renewable energy4→13
- Heat pump15
- Electricity6
- Heat exchanger5
- Borehole5
- Waste heat4
Where energy efficiency is researched across Sweden
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.