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Home COUNTRY BENELUX

Cleaner, smarter, scalable: 10 promising startups shaping Europe’s ClimateTech future

EU Startupsby EU Startups
August 11, 2025
Reading Time: 13 mins read
in BENELUX, DACH, GREEN, SCANDINAVIA&BALTICS, UK&IRELAND, VENTURE CAPITAL
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Climate innovation doesn’t always look like what we expect. It’s not only solar panels and wind farms, but also technologies that work behind the scenes to reduce emissions, manage waste, and rethink industrial processes. In Europe, a new wave of ClimateTech startups is focusing on making systems smarter, cleaner, and more resilient.

These companies are operating at the intersection of industry, data, and carbon removal. Some focus on point-source solutions like reducing emissions from fossil fuel infrastructure or capturing CO₂ directly from the air. Others are developing alternatives to industrial inputs or systems that help businesses track and control energy usage more effectively.

The following list highlights 10 European ClimateTech startups founded since 2022 that are pushing for cleaner outcomes across sectors. From zero-emissions fuel production to smarter electrical panels, these teams are focused on climate impact at scale.

superflox

SuperFlox is a Hague-based climatetech company that develops and licenses patented flameless oxidation systems designed to drastically reduce industrial air pollution. Its technology treats waste gases at the source, converting harmful compounds into water vapour and CO₂, which can then be captured for resale. Tested and certified by major oil companies, SuperFlox offers a cost-effective, scalable alternative to traditional pollution control systems.

Unlike conventional incineration methods, SuperFlox operates at lower temperatures, removing up to 98% of nitrogen oxides (NOx) while avoiding explosion risks. The system is designed to be bolted onto existing infrastructure, making it suitable for sectors ranging from oil refineries and fracking operations to tank degassing and hydrogen production. Founded in 2024, the company has raised €7 million to date.

SOLAq

Solaq is an Amsterdam-based startup developing sustainable air-to-water systems to tackle global water scarcity. Its proprietary technology extracts clean drinking water directly from the air using a solar-powered, three-step process that requires no grid connection or existing infrastructure. Designed for use in remote communities, agriculture, emergency response, and military operations, the system produces water around the clock and can be monitored remotely.

Built for affordability and ease of use, Solaq’s modular units require low-tech maintenance and eliminate the need for bottled water or trucking. The process avoids toxic materials and waste, delivering safe drinking water while minimising environmental impact. Founded in 2023, the company has raised €1.93 million to date.

Reverion

Reverion is an Eresing-based startup building containerised, reversible power plants that convert biogas or hydrogen into electricity and vice versa. At the core of its system are solid oxide fuel cells that can switch between electricity generation and electrolysis, enabling both power production and storage in the form of green hydrogen or methane. This flexible design allows Reverion’s units to stabilise energy grids by responding to supply and demand changes, while also capturing pure biogenic CO₂ for industrial use or long-term storage.

The system achieves electrical efficiencies of up to 80% in gas-to-power mode and up to 75% round-trip efficiency in hydrogen storage applications. Designed for use in agriculture, industrial energy storage, and distributed energy networks, Reverion’s plants can be scaled and deployed with minimal switching time between operational modes. Founded in 2022 as a spin-out from the Technical University of Munich, the company has raised nearly €74 million to date.

Liquidsun

Liquid Sun is a startup from Tampere, Finland, that turns CO₂ into clean fuel using a technology called low-temperature electrolysis. The process uses renewable electricity to convert carbon emissions into a new type of sustainable jet fuel called eSAF. This fuel can be used in today’s aeroplanes without any changes to engines or airports. The company’s goal is to help reduce aviation’s climate impact without stopping air travel.

The technology is built to be efficient, affordable, and easy to scale. It works by breaking CO₂ down and rebuilding it into useful fuels and chemicals. The system can also be used in shipping, freight, and factories to replace fossil fuels. Everything is designed to fit into existing systems, so companies don’t have to start from scratch. Liquid Sun was founded in 2022 and has raised €5 million to build and test its solution.

Hybird-energy

Hybird Energy is a Copenhagen-based startup that makes smart electrical panels to help businesses track and reduce their energy use. Unlike traditional systems, Hybird monitors electricity at the source level, showing exactly which appliances or areas use the most power. This helps companies save money, cut their CO₂ emissions, and find hidden inefficiencies. The platform works in real time and can be accessed remotely, so teams can spot problems early and make fast decisions.

The system also helps with ESG compliance by automatically collecting and organising energy data for reporting. The platform includes AI features, including integration with ChatGPT, to make analysis simple. Founded in 2023, Hybird has raised €2.4 million to date.

greenlyte

Greenlyte Carbon Technologies is an Essen-based startup developing a low-energy method to capture CO₂ directly from the air while also producing hydrogen. The process works in three steps: first, CO₂ is absorbed from ambient air into a liquid solution. Then it is converted into a solid form. Finally, through electrolysis, the system releases pure CO₂ and hydrogen gas, which can be used in fuels or industrial processes. The absorbent is reused in each cycle, making the system efficient and fully circular.

What makes Greenlyte’s approach stand out is its ability to generate two useful products at the same time. The technology is designed to work in a variety of climates and can be powered by renewable energy. It can also run with flexible timing, helping match energy supply with system needs. Founded in 2022, Greenlyte has raised €18.5 million and is supported by several European climate funds, research institutions and commercial partners.

undo

UNDO is a London-based carbon removal company using enhanced rock weathering to permanently capture CO₂ from the atmosphere. The method involves spreading crushed silicate rock on farmland, where it reacts with rainwater and CO₂ to form stable carbon compounds that are locked away for hundreds of thousands of years. This process, rooted in natural geology, is scaled up using local farm equipment and rock by-products, making it both cost-effective and energy efficient.

Beyond carbon removal, UNDO’s work also improves soil quality and supports local communities. The minerals in the rock enrich farmland and reduce the need for fertilisers, while the company partners with rural contractors to deliver its service. With operations in the UK, US, Australia and Canada, UNDO is scaling its efforts globally. The startup was founded in 2022 and has raised over €10.2 million to date.

cocoon

Cocoon is a London-based climate technology company developing low-carbon construction materials by repurposing industrial waste. Its core innovation involves turning steel slag and other by-products into a supplementary cementitious material that can replace traditional cement in construction. The process not only lowers the carbon footprint of cement but also stores CO₂ permanently within the final product, helping address emissions from two of the world’s most polluting industries.

The company’s solution is designed to scale alongside the rising demand for steel and cement, offering a practical way to decarbonise both sectors at once. By using existing waste streams, Cocoon reduces landfill use and creates value from materials that would otherwise go unused. Founded in 2023, the company has raised €4.6 million to date.

Clean-Food-Group

Clean Food Group is a London-based company producing sustainable oils and fats for use in food and cosmetic products. Its core technology, CLEANOilCell™, uses non-GMO yeast and food waste as raw materials to create alternatives to traditional oils like palm and soybean. Developed through over a decade of research and supported by UK government funding, the platform can be retrofitted into existing fermentation infrastructure, helping scale production quickly and at lower cost.

The company’s approach addresses several key sustainability challenges, including food waste, supply chain volatility and deforestation linked to industrial farming. By using food waste as a nutrient source, Clean Food Group contributes to a more circular food system while reducing reliance on land-intensive crops. Its ingredients are designed to meet the functional needs of manufacturers without the environmental drawbacks of conventional oils. Founded in 2022, the company has raised over €8.3 million to date.

sparxell

Sparxell is a Cambridge-based startup developing a biodegradable, plant-based alternative to synthetic pigments, glitters and colourants. Inspired by structural colours found in nature, such as those on butterfly wings and peacock feathers, Sparxell’s technology uses cellulose to reflect vibrant colours without the need for dyes, mica or heavy metals. The result is a non-toxic, plastic-free colour platform suitable for use in cosmetics, packaging, fashion and more.

The pigments are made through a patented process that mimics natural light reflection, offering fade-resistant colour with minimal environmental impact. Since the materials are fully biodegradable and sourced from renewable inputs, Sparxell offers manufacturers a way to reduce waste and avoid harmful chemicals. The company was founded in 2022 and has raised €4.5 million to date.

By the way: If you’re a corporate or investor looking for exciting startups in a specific market for a potential investment or acquisition, check out our Startup Sourcing Service!

Read the orginal article: https://www.eu-startups.com/2025/08/cleaner-smarter-scalable-10-promising-startups-shaping-europes-climatetech-future/

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