Circular Economy Startups

Carbonwave develops plant-based biomaterials from seaweed, specifically harvesting brown seaweed (Sargassum) blooms from coastal ecosystems to produce upcycled materials for commercial and local use. The company addresses environmental degradation in tropical and subtropical coastal regions while supplying sustainable alternatives to conventional materials.

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

Cartlow is an online marketplace selling discounted products such as electronics and consumer goods, including refurbished and open-box items, to retail shoppers. It also offers B2B wholesale/bulk purchasing for businesses, and operates in the UAE.

2 investors

Cartonplast Group operates a rental and pooling system for reusable plastic transport packaging such as layer pads, pallets, and top caps, serving container and bottle manufacturers in the food, beverage, cosmetics, and pharmaceutical industries. It manages the full closed-loop cycle including delivery, collection, cleaning, inspection, and recycling of the packaging materials.

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

Cemvita uses proprietary microbial strains it calls xtremophiles to convert carbon waste into usable resources, applying synthetic biology to heavy industry and biorefining. Its work spans regenerative bio-inputs for agriculture and circular-economy processes for industrial applications.

2 investors

Cetogenix is a New Zealand-based climate technology company developing engineering and process solutions in the cleantech and circular economy space.

2 investors

ChainCraft uses non-GMO fermentation (chain elongation) technology to upcycle organic food residues into bio-based fatty acids, offering alternatives to fossil and palm oil-based chemicals. Its products serve animal nutrition, chemical derivatives, food, flavors and fragrances, and agricultural markets.

2 investors

Changeover Technologies develops patented formula and pelletising technology that converts discarded fine-particle waste streams into recyclable pellets, aimed at cleaning up legacy waste and reducing CO2 emissions. The company works on projects such as quartz recovery for Europe's silicon supply chain and is based in Northern Ireland.

2 investors

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

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

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

Cityfurnish is a furniture and appliances rental service operating in India that offers subscription-based access to home furnishings at affordable costs. The company serves Indian urban residents seeking flexible, commitment-free rental solutions without long-term purchase obligations.

2 investors

CleanHub operates a plastic credit system that funds the collection of plastic waste from coastal and river communities, allowing brands to offset and offset their plastic footprint with verified impact. It serves consumer brands seeking to reduce plastic pollution, with collection verified by TÜV SÜD and B Corp certification.

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

CLUBZERO operates a reuse system for the food and beverage industry, managing the transition from single-use to reusable packaging by serializing packaging, coordinating launches, and running operations through a network of washing and logistics partners. It serves brands and retailers across on-trade, retail, and online channels in the UK, U.S., Singapore, and UAE.

2 investors

COAT manufactures and sells made-to-order paint products formulated with UK-sourced ingredients, positioning itself as a climate-positive and B Corp certified alternative to mass-produced paint. The company operates direct-to-consumer, eliminating retail intermediaries and overproduction waste.

2 investors

Cox Cleantech is an investor that backs cleantech founders and companies advancing circularity and resource efficiency across industries. It partners from early startup stage through later-stage growth, offering capital, enterprise expertise, and a strategic network, along with residency, accelerator, and growth programs.

2 investors

Croissant is a resale app and browser extension that lets consumers see the resale value of fashion and branded items they own, then sell them for cash or store credit by shipping them in. It connects to users' email to find past purchases and surface buy-back deals across participating merchants.

2 investors

Cycle.eco builds emission-free local transportation solutions for urban areas, focusing on decarbonizing city transport and replacing polluting vehicles and congestion. The company serves businesses and individuals needing sustainable goods and passenger transport with reduced environmental impact.

2 investors

Dagne Dover sells bags and accessories directly to consumers and offers e-gift cards with no processing fees or expiration dates. The company also runs a resale program for used items to reduce carbon impact.

2 investors

Danu Robotics manufactures AI-controlled two-arm robots and computer vision systems for sorting and picking dry mixed recyclable materials, designed to retrofit into existing manual waste sorting facilities (MRFs). The systems target waste management operators seeking to automate recycling sortation.

2 investors

DASH makes zero-sugar soft drinks produced from surplus "wonky" fruit sourced from UK farmers to reduce food waste. The company is a certified B Corp operating in the beverage market.

2 investors