Top 8 Sustainability Startups in Finland in 2025

Finland has been known for a long time as a world leader in clean technology, the circular economy and being responsible for the environment. A new generation of sustainability startups is rising to the top as the country works towards carbon neutrality and strong environmental stewardship. 

These businesses are not only addressing urgent environmental issues, but they are also shaping the future of energy, materials, food production and waste reduction. Below, we look at eight of the most promising sustainability startups in Finland. Each one is making a real difference in the global green transition with new technology and bold ideas.

Why We Need Sustainability Startups 

Climate change, pollution and the depletion of natural resources are no longer far-off threats; they are real problems that affect economies, societies and ecosystems all over the world every day. Problems like carbon emissions, unsustainable consumption and energy instability can’t be solved by traditional industries alone. This is where new businesses that focus on sustainability come in.

These new businesses are engines of innovation. They make new materials that cut down on waste, come up with energy systems that don’t release emissions and come up with new ways to grow food, power our homes or manage our resources. Because they are so flexible, they can quickly try out new ideas, work together across borders and go where bigger companies might not want to go.

In short, sustainability startups are very important because they bring new ideas, disruptive technologies and scalable solutions to the table. This speeds up the world’s move towards a cleaner, stronger future.

What Sustainability Startups Do

Sustainability startups try to come up with new ways to solve environmental problems in areas like: 

• Clean energy and storage.
• Models of the circular economy
• Taking and capturing carbon
• Building and using materials that are good for the environment
• Agriculture and food technology that are good for the environment; cutting down on waste and recycling

Their work includes science, engineering, policy and getting people involved in the community, which makes solutions for sustainability both useful and scalable.

The Future Of  Sustainability Startups In Finland

The future looks very bright for sustainability startups in Finland. The Finnish government actively supports green innovation through funding agencies like Business Finland. Its universities produce some of the best research talent in the world and the country has built a thriving ecosystem around cleantech and deep-tech businesses.

Finland is expected to be at the forefront of progress in carbon-neutral construction in the next few years by: 

• Being a key player in the development of hydrogen and batteries
• Being great at technologies for the circular economy
• Finding global solutions for clean energy and waste management on a large scale.
• Lead the way in the food and biomaterials industries

Startups are at the centre of this movement and Finland is not only making its own green transition but also affecting the direction of global sustainability.

Top 8 Sustainability Startups In Finland

Finland is known for being an environmental leader, but it’s not just because of its big forests, clean energy policies or vision for a circular economy. A new wave of startups is changing the way we think about sustainable innovation.

Hycamite 

Hycamite is one of the most exciting cleantech companies in Finland. It is the first to use methane pyrolysis to make low-carbon hydrogen and solid carbon without releasing CO₂. Hycamite gives industries a way to get cleaner fuels on a large scale by breaking down methane using thermo-catalytic processes. Hycamite is becoming a global leader in hydrogen innovation, which is a key part of the world’s goal to reach net-zero emissions. This is because industrial plants can make thousands of tonnes of hydrogen every year and the company has made a lot of recent investments.

Carbonaide

Concrete production is a big source of greenhouse gas emissions around the world, but Carbonaide is changing that. This startup, which VTT supports, has come up with a groundbreaking way to cure CO₂ that turns concrete products into carbon sinks. They make building materials that are not only low-emission but also carbon-negative by mineralising carbon inside precast concrete. Carbonaide’s technology is a game-changing step towards climate-safe infrastructure for the construction industry, which is one of the world’s biggest polluters.

Spinnova

Spinnova wants to change the fashion industry, which is one of the most harmful to the environment, by using natural, long-lasting materials. The company makes textile fibres from wood pulp or waste without using harmful chemicals. This cuts down on both resource use and environmental impact. Their groundbreaking process mimics the way spiders spin silk, resulting in fibers that are biodegradable, recyclable and far more sustainable than conventional textiles.  With global fashion houses taking notice, Spinnova is helping turn the textile sector into a more circular ecosystem. 

Swappie

Swappie is a leader in the circular economy because it deals with electronics, which is one of the fastest-growing waste streams. Swappie buys, fixes and resells used iPhones and tablets, which makes them last longer and cuts down on e-waste by a huge amount. Their certified refurbishment process makes sure that customers can get high-quality devices at lower prices. This also keeps tonnes of electronics out of landfills every year. Swappie’s success shows that being environmentally friendly and making things easy for customers can go hand in hand.

Solar Foods 

Solar Foods is changing the way food is made by making Solein, a single-cell protein from electricity, water, microbes and CO2. This way of making things doesn’t need any farmland, animals or as many resources as traditional farming. As climate change and population growth put pressure on food systems around the world, Solar Foods offers a radical solution that is both sustainable and scalable. In the years to come, their new idea could change the way people get their food.

Polar Night Energy

People all over the world know about Polar Night Energy’s “sand battery,” which is a new way to store renewable energy. The system stores renewable energy as heat in sand, which can then be released to power local grids or heating systems. This cheap, long-term storage solution could help make the supply of renewable energy more stable, which is an important step towards fully using wind and solar power.

Cactos

Cactos makes distributed energy storage systems out of old electric vehicle batteries. Cactos cuts down on waste by reusing used Tesla and other EV batteries. This helps businesses and utilities keep the grid stable. Their modular battery systems help you use energy more efficiently, lower peak loads and better integrate renewable energy sources. Cactos is the perfect example of how to combine ideas from the circular economy with new energy technologies.

BroadBit Batteries

BroadBit Batteries is making sodium-based batteries as a more environmentally friendly option to lithium-ion batteries. These batteries are especially good for storing a lot of energy because sodium is more common, cheaper and found in a wider range of places. Their technology could make it easier and cheaper to switch to renewable energy and less reliant on important minerals. This is a big step towards making the economy and the environment more sustainable.