Top 18 Green Energy startups in Stockholm
Nov 21, 2025
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10
2
Funding: $10.9B
H2 Green Steel is building a steel production plant (in Boden, northern Sweden) that reduces the iron ore into green iron using 100% green hydrogen with near-zero emission. The heart of the plant is giga-scale electrolyzer, powered by renewable electricity (instead of coal) that splits water into its constituent parts: hydrogen and oxygen. Then in the reduction reactor the hydrogen reacts with oxygen in the iron ore, transforming the iron ore into sponge iron and producing (environmentally friendly) water steam. In the melt shop the iron is charged into an electric arc furnace, where it is mixed with steel scrap. It is then melted with a powerful electrode and alloys are added in a ladle furnace. The molten steel is transformed into solid products.
H2 Green Steel is building a steel production plant (in Boden, northern Sweden) that reduces the iron ore into green iron using 100% green hydrogen with near-zero emission. The heart of the plant is giga-scale electrolyzer, powered by renewable electricity (instead of coal) that splits water into its constituent parts: hydrogen and oxygen. Then in the reduction reactor the hydrogen reacts with oxygen in the iron ore, transforming the iron ore into sponge iron and producing (environmentally friendly) water steam. In the melt shop the iron is charged into an electric arc furnace, where it is mixed with steel scrap. It is then melted with a powerful electrode and alloys are added in a ladle furnace. The molten steel is transformed into solid products.
3
Funding: $710M
Aira operates as a clean energy-tech company driving the clean energy revolution with air source heat pumps.
Aira operates as a clean energy-tech company driving the clean energy revolution with air source heat pumps.
4
Funding: $595.3M
VOI Technology owns, operates, and manages electric scooters for urban commuters in Stockholm.
VOI Technology owns, operates, and manages electric scooters for urban commuters in Stockholm.
6
Funding: $157M
Elvy Energy provides a novel method of energy consumption through the installation of solar panels, heat pumps, and battery systems.
Elvy Energy provides a novel method of energy consumption through the installation of solar panels, heat pumps, and battery systems.
7
Funding: $121.4M
Cloover partners with renewable energy professionals to simplify and finance sustainable home upgrades, offering embedded financing options for technologies like solar panels, battery storage, heat pumps, and EV charging systems.
Cloover partners with renewable energy professionals to simplify and finance sustainable home upgrades, offering embedded financing options for technologies like solar panels, battery storage, heat pumps, and EV charging systems.
8
Funding: $113.1M
X Shore creates high performance all-electric powered boats that are changing and charging the boat industry for a fossil free tomorrow.
X Shore creates high performance all-electric powered boats that are changing and charging the boat industry for a fossil free tomorrow.
9
Funding: $58.2M
Flower is Flexible Power. Our vision extends beyond the energy transition, we aim to become the pioneering force powering the energy system of tomorrow.
Flower is Flexible Power. Our vision extends beyond the energy transition, we aim to become the pioneering force powering the energy system of tomorrow.
10
Funding: €35M
SunRoof is a start-up developing fully solar 2-in-1 roofs and facades as well as solutions to support smart energy management.
SunRoof is a start-up developing fully solar 2-in-1 roofs and facades as well as solutions to support smart energy management.
11
Funding: €28.3M
ClimateView is a climate action technology company that combines scientific modelling, machine learning and interface design to help cities understand and act on the complex climate challenge, clearly.
ClimateView is a climate action technology company that combines scientific modelling, machine learning and interface design to help cities understand and act on the complex climate challenge, clearly.
13
Funding: $15.9M
Greenely provides an energy management platform for consumers to manage energy use and contribute to overall power system stability.
Greenely provides an energy management platform for consumers to manage energy use and contribute to overall power system stability.
14
Funding: $14.3M
Plexigrid develops software solutions that enable increased renewable energy in electrical distribution grids.
Plexigrid develops software solutions that enable increased renewable energy in electrical distribution grids.
15
Funding: SEK80M
Blykalla is developing and building small modular reactors to deliver the next generation of clean energy. We take leading research to industrialization through our Swedish Advanced Lead Reactor (SEALER).
Blykalla is developing and building small modular reactors to deliver the next generation of clean energy. We take leading research to industrialization through our Swedish Advanced Lead Reactor (SEALER).
16
Funding: €7.1M
Blixtis a company that offers semiconductor-based circuit breakers and household fuses.
Blixtis a company that offers semiconductor-based circuit breakers and household fuses.
17
Funding: SEK21M
Cling Systems ensures that batteries are recycled, repurposed, and reused by connecting the ecosystem.
Cling Systems ensures that batteries are recycled, repurposed, and reused by connecting the ecosystem.
18
Funding: $1.5M
Tether builds AI that turns millions of parked EVs into the world’s largest battery
Tether builds AI that turns millions of parked EVs into the world’s largest battery
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