London has rapidly become one of the world’s most dynamic hubs for climate innovation. Backed by a strong network of green policies, investor momentum, and cutting-edge research, the city has emerged as a leading ecosystem for building and scaling deep-tech climate solutions.
According to PwC’s latest Global State of Climate Tech report, the UK is strengthening its position as a global leader in climate tech innovation. Over the past year, UK climate tech companies secured £4.5 billion in investment, reflecting strong momentum and growing investor confidence. This continued rise in funding showcases the UK’s vibrant ecosystem and its increasing appeal for climate-focused ventures, shaping the future of sustainable technologies.
Meet the 10 Companies Driving Breakthrough Innovation in Climate Tech:
Seabound, founded in 2021 with USD 4.4 million in funding, is a sea-transportation startup focused on tackling emissions from the global shipping industry. The company has developed onboard carbon-capture units capable of absorbing up to 95% of a ship’s carbon dioxide output. Once vessels reach port, the captured CO₂ can be safely stored or repurposed. As maritime traffic continues to grow worldwide, Seabound’s scalable solution offers a practical path to ocean-sector decarbonisation. The company has received support from Unreasonable Impact, and its founders have been recognised in Forbes 30 Under 30 for social impact.
Climate X, established in 2020 and supported by USD 5.4 million in funding, operates within the financial services sector, helping organisations understand how climate-driven events will affect their assets. Its flagship platform, Spectra, uses advanced modelling and artificial intelligence to predict the impact of extreme weather through the end of the century. This allows financial institutions and businesses to strengthen resilience plans, forecast potential losses, and make more climate-aware investment decisions in an increasingly unpredictable world.
Connect Earth, founded in 2021 with USD 5.6 million in funding, focuses on enabling financial institutions to measure and reduce their environmental impact. The company’s Connect Insights API calculates carbon footprints at the transaction level and displays them directly to users. Since financed emissions can significantly outweigh operational ones, this level of transparency helps banks, fintech platforms, and consumers make more sustainable financial choices and better understand their environmental influence.
Carbon Re, launched in 2020 and backed by USD 4.8 million, is dedicated to reducing industrial emissions by improving operational efficiency in highly carbon-intensive sectors. The company’s Delta Zero platform builds digital replicas of cement plants and uses artificial intelligence to optimise energy use in real time. This leads to lower emissions, reduced fuel consumption, and improved overall performance. Carbon Re is also expanding its work to the steel and glass industries, opening new opportunities for large-scale industrial decarbonisation.
Biohm, founded in 2016 and supported by USD 7.5 million in funding, is reimagining the construction sector with bio-based and regenerative materials. The company has developed mycelium-based insulation that performs on par with traditional materials while remaining biodegradable. Biohm also produces Orb, a versatile material created from repurposed waste streams such as fruit peels. Through these innovations, Biohm promotes a circular approach to building design, enabling structures that can be modular, reconfigurable, and environmentally restorative.
Hoxton Farms, established in 2020 with USD 22.2 million in funding, works at the intersection of biotechnology and food innovation. The company uses computational modelling and tissue-engineering techniques to grow animal-free fat, a key component needed to make alternative meat taste authentic. By using digital twins and small cell samples instead of large bioreactors, Hoxton Farms is creating a more efficient and scalable production model. This positions the company as a key contributor to the future of cultivated meat.
Multus, founded in 2019 and backed by USD 9.6 million, supports the cultivated-meat industry by creating essential growth media and ingredients required for lab-grown protein production. Since livestock farming is a major source of global emissions, cultivated meat provides a promising alternative. Multus’ growth solutions enable companies to produce high-quality cultivated meat without building costly in-house laboratory infrastructure, making the sector more accessible and commercially viable.
Oddbox, launched in 2016 with USD 6.9 million in funding, is a food-waste-focused company rescuing produce that would otherwise go unused because of size, shape, or oversupply. Its subscription-based model delivers this rescued fruit and vegetables directly to consumers while also working closely with farmers. For example, Oddbox diverted seven tonnes of surplus apples from waste streams to produce its signature juice. As a certified B Corporation, Oddbox has already saved more than 3,500 tonnes of food and plans to reach 90,000 tonnes in the next few years.
FlexSea, founded in 2020 with undisclosed funding, is transforming the packaging sector through seaweed-based materials that are biodegradable, compostable, and even safe for consumption. Unlike conventional plastics that persist in the environment for hundreds of years, FlexSea’s materials naturally break down once they are no longer needed. The company’s bio-polymers are durable, recyclable, cost-effective, and represent a major step toward a more circular and sustainable packaging ecosystem.
SAFI, founded in 2021 and backed by USD 5.5 million in funding, is a recycling-focused company using AI-driven sorting systems to modernise material recovery facilities. Its advanced computer-vision technology analyses items on conveyor belts in real time, revealing instant insights into quality, contamination, and recovery rates. With this level of precision, recycling facilities can improve efficiency, refine pricing strategies, and strengthen trust with buyers. SAFI’s approach is helping create a more intelligent and sustainable recycling industry.
London’s greentech ecosystem continues to demonstrate how innovation, investment, and purpose-driven entrepreneurship can work together to deliver real climate impact. These ten companies represent only a fraction of the breakthroughs emerging across the city, yet each one showcases how ambitious ideas can evolve into solutions that meaningfully reshape industries.
From carbon capture and alternative materials to climate-risk modelling and next-generation food systems, London’s founders are proving that sustainability and scalability can advance hand in hand. As global demand for climate solutions grows, the city is well-positioned to remain a leading force in the transition to a cleaner, more resilient, and more sustainable future.
