Circular Economy Startups

Carbogenics produces biochar from organic waste such as secondary biomass and difficult-to-recycle paper for use in anaerobic digestion, wastewater treatment, soil amendment, and carbon sequestration. The company, based in Edinburgh, operates as a cleantech and circular economy business addressing energy and food sustainability challenges.

2 investors

CarboMat manufactures advanced carbon materials—carbon fibers, hard carbon, and synthetic graphite—from low-value industrial byproducts for use in composite manufacturing and battery applications. The company uses proprietary low-GHG processes designed to reduce production costs by ~60% and emissions by ~50% relative to conventional methods.

2 investors

Carbonyx develops proprietary technology to recover valuable materials from waste rock while permanently removing carbon from the atmosphere, producing carbon-negative and low-carbon materials for infrastructure and supply chains. The company's modular production systems operate under mild conditions and can be deployed near mining, construction, and manufacturing sites.

2 investors

Carton Vert sells reused/second-hand cardboard boxes and packaging to businesses in France, offering delivery within five business days and an environmental impact certificate. It positions reused packaging as a lower-cost, lower-carbon option that helps companies meet environmental regulations such as the AGEC law.

2 investors

Cartonplast manufactures reusable plastic pallets, layer pads, and trays for food and beverage industry secondary packaging and logistics. Products are ISO 22000 certified, weather-resistant, recyclable, and designed for automated processes with traceability features.

2 investors

Cascadia Seaweed cultivates kelp on low-impact ocean farms in British Columbia and manufactures seaweed-based products such as natural fertilizers and livestock feed for crop and livestock farmers. Operating in partnership with coastal First Nations, it positions itself as North America's largest ocean cultivator of kelp for agricultural products.

2 investors

Cashify operates a platform for buying, selling, repairing, and refurbishing used technology devices to extend their lifecycle and reduce electronic waste. The company serves consumers seeking affordable tech while promoting circular economy principles.

2 investors

Cecilia uses microwave-based technology to convert industrial plastic waste into carbon materials and clean hydrogen. It targets circularity for industries and applications including space exploration.

2 investors

CeLLife Technologies develops battery testing and diagnostics technology that enables advanced data collection to assess battery quality, reduce scrapping of good cells, and extend battery life for manufacturers and energy storage operators. Founded as a spin-off from Tampere University, the company serves the battery production industry with a focus on European and global markets.

2 investors

CelluComp develops sustainable, cellulose-based bio-composite materials for packaging applications, serving consumer goods and packaging companies seeking environmentally responsible alternatives.

2 investors

Changeover Technologies develops pelletising technology to recover waste materials from industrial processes, particularly silicon refining, and reintroduce them into the circular economy to reduce waste and CO2 emissions.

2 investors

CHONEX develops insect-derived biological products that enhance soil health, plant nutrition, and crop resilience to address challenges including salinity, drought, heat, and nutrient deficiency. The company serves growers by improving root systems and nitrogen use efficiency through a scalable closed-loop biological platform.

2 investors

ChopValue manufactures prefabricated wall panels for office interiors, made from undervalued resources using hyper-local production methods. The panels offer acoustic properties, reduce installation time and labor, and minimize construction waste and emissions.

2 investors

ShopCider is an online fashion retailer offering 1990s-inspired apparel and accessories for consumers seeking vintage supermodel-era style.

2 investors

Ciloo is a platform for managing branded products (promotional items and print materials) through on-demand and local production across 30 countries, enabling companies to reduce costs, waste, and carbon emissions while maintaining brand compliance.

2 investors

Circular IQ offers a software platform for measuring and reporting circular economy performance, including support for the WBCSD Circular Transition Indicators (CTI) and ESRS E5 compliance. It serves companies seeking to assess and improve the sustainability and circularity of their products.

2 investors

Circular11 recycles waste-bound plastic into low-carbon fencing, furniture, and landscaping products such as plastic lumber for the construction and estates sectors. It uses material science, machine learning to optimize formulations for each waste stream, and a digital tracking system to provide traceable, quantifiable impact reporting.

2 investors

Circularise provides supply chain traceability software that helps companies trace materials across complex value chains, connect data to products, and share verifiable information. It serves industrial manufacturers seeking transparency and circularity in their supply chains.

2 investors

Circulus transforms used LDPE and LLDPE plastics into high-quality recycled resins for flexible packaging applications. The company serves brand owners, retailers, and converters seeking sustainable materials for bags, films, and packaging.

2 investors

Circunomics operates a B2B marketplace and predictive analytics platform for second-life and used batteries, matching supply and demand across battery lifecycle stages. It serves mobility OEMs, the energy sector, and recyclers to support a circular battery economy.

2 investors

Citron designs children's mealtime and school products — including compartmented lunchboxes, insulated food jars, leak-proof water bottles, recycled-PET backpacks, and bamboo tableware — using BPA-, phthalate-, and lead-free materials. The brand sells to parents and families and distributes through 25 partners across 49 countries.

2 investors

Cleaq provides flexible IT equipment leasing with integrated financing, insurance, and fleet management software for businesses. The platform simplifies hardware procurement and management while offering short-term commitment options and rapid replacement services across the EU and internationally.

2 investors

Cloud Factory is a metal 3D printing company that mass-manufactures fine jewelry using proprietary printing parameters without molding or casting. It offers on-demand jewelry manufacturing, fulfillment, drop-shipping, and personalized packaging for artists and creators launching branded jewelry merchandise.

2 investors

CLUBZERØ operates a reuse system scheme for packaging across food and beverage, retail, and delivery channels, using AI-powered technology to track reusable packaging and help brands comply with Extended Producer Responsibility regulations. The platform serves major food and beverage companies and retailers seeking to reduce packaging waste and operational costs.

2 investors