10 European ClimateTech Startups Turning Decarbonization Into Big Business

Jan de Vries · 2026-07-13

With the World Meteorological Organization reporting that June 2026 was the hottest June recorded for western Europe and the second warmest globally, the pressure is mounting to accelerate the transition to cleaner, more resilient energy systems. The debate has also reached policymakers, with reports that the European Commission's upcoming Electrification Action Plan, expected to be launched on July 15, 2026, will not introduce new measures to improve access to cooling technologies despite rising temperatures across the continent. The discussion highlights the broader challenge Europe faces: reducing emissions while ensuring its energy infrastructure can meet growing demand. Against this backdrop, Europe's ClimateTech sector continues to attract investment as startups develop solutions to decarbonize industries ranging from energy and manufacturing to transport and the built environment. From battery recycling and carbon accounting to heat pumps, thermal storage, and renewable energy platforms, these companies are tackling some of the biggest barriers to achieving net-zero targets while building commercially viable businesses. ### Aira: Making Home Heating Clean and Simple Founded in 2022, Aira is a Stockholm-based clean energy company providing heat pumps and home energy-saving solutions directly to consumers. The company is helping households transition away from fossil fuel heating by offering an integrated platform for home electrification and energy efficiency. By making low-carbon heating more accessible, Aira aims to accelerate residential decarbonization across Europe. In doing so, the company has raised more than $680 million across five funding rounds, including a close of $164 million in August of 2025.  ### cylib: Building a Circular Battery Supply Chain Aachen-based cylib, founded in 2022, is a startup developing sustainable battery recycling technology for end-of-life lithium-ion batteries. Its proprietary process recovers critical raw materials, including lithium, graphite, nickel, and cobalt, helping build a circular battery supply chain for Europe's growing electric vehicle market. By reducing reliance on virgin mining, cylib is supporting the energy transition through more sustainable battery production. The company has raised $171 million across five funding rounds, including a $60 million Series A in May of 2024. ### Isometric: Bringing Trust to Carbon Removal Founded in 2022 and based in London, Isometric is a ClimateTech company operating a science-backed registry for carbon removal credits. Its platform provides independent verification and monitoring of carbon removal projects, helping businesses purchase high-quality, transparent carbon credits. The company is working to improve trust and accountability in the voluntary carbon market. Isometric has raised $61 million across three funding rounds, including a close of $37 million in June of this year. ### trawa: Simplifying Clean Energy for Businesses trawa is a Berlin-based startup offering an end-to-end Energy-as-a-Service platform for small and medium-sized businesses. Founded in 2022, the company's software combines renewable electricity procurement with intelligent energy management to help companies reduce costs and lower carbon emissions. By simplifying access to clean energy, trawa is helping businesses accelerate their decarbonization efforts. The company has raised $40 million across four funding rounds, which includes a close of $11 million in May 2024. ### Samara: Bringing Solar to European Homes Founded in 2022, Samara is a Madrid-based clean energy company helping homeowners adopt rooftop solar and home electrification solutions. The company simplifies the installation process, making it easier for households to lower both energy bills and carbon emissions. Samara is focused on accelerating the transition to cleaner residential energy across Europe. The company has raised $20 million across three funding rounds, which includes a $5 million round raised just 6 months after launch in December 2022. ### Climatiq: Powering Emissions Tracking with Data Berlin-based Climatiq, founded in 2021, is a climate software company providing APIs and emissions data for businesses. Its platform helps companies measure, track, and reduce their carbon footprint by integrating accurate emissions data into their existing workflows. By making carbon accounting more accessible, Climatiq is enabling companies to make informed decisions about their environmental impact. The company has raised significant funding to expand its data coverage and customer base across Europe. - These startups are proving that decarbonization can be profitable. - They are attracting major investment from global venture capital firms. - Their technologies are essential for meeting net-zero targets. These companies represent a wave of innovation that is turning climate challenges into business opportunities. As Europe pushes toward its climate goals, these startups will play a crucial role in building a sustainable economy.