Circular Economy Startups

Carbon Cell is a team of designers, engineers, and scientists developing sustainable materials aimed at reducing plastic use and carbon emissions. The company operates in the sustainable materials and climate space.

1 investor

Revora Materials operates a technology platform that recovers critical minerals such as magnesium, nickel, manganese, platinum group metals, and rare earth elements from industrial byproducts and ores, including mine tailings, slag, and cement-making residues. The company also converts alkaline feedstocks and CO₂ into construction materials, targeting heavy industry and domestic critical mineral supply chains.</parameter> <parameter name="founders">[{"full_name": "Sravanth", "title": "Co-Founder & CEO"}, {"full_name": "Hassnain", "title": "Co-Founder & Senior Director of Engineering"}, {"full_name": "Greeshma Gadikota", "title": "Co-Founder"}]

1 investor

CarobWay develops clean-label food ingredients derived from carob, using a zero-waste process to turn the crop into products for the food industry. The company positions itself around sustainable, science-backed food solutions.

1 investor

Maya Hueltech manufactures biodegradable utensils and straws made from natural agave fibers for the food service and consumer goods market. The products are designed to be both environmentally sustainable and competitively priced.

1 investor

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.

1 investor

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.

1 investor

Casella provides waste collection, recycling, and resource management services for residential customers, businesses, municipalities, and institutions, transforming waste into reusable resources. Its Resource Solutions team manages over 10,000 customer locations across more than 40 U.S. states, offering environmental and zero waste services.

1 investor

CaSil Technologies (CaSilTech) develops patented technology that captures problematic silica from geothermal water, improving heat and electricity recovery from geothermal resources while producing nanostructured calcium silicate materials used in smart fertilisers, metal recovery, rubber, paint, paper, and building insulation. The company applies a circular economy approach to geothermal energy and environmental product manufacturing.

1 investor

Castalie is a French company that designs and supplies eco-designed premium water fountains delivering microfiltered still, sparkling, chilled, and hot water for companies, hotels, and restaurants. Its solution replaces single-use plastic bottles, and it operates across France with over 7,000 fountains installed since 2011.

1 investor

Castles Labs makes Manure Magic, an all-natural product that uses microbial transference to break down manure into soil, eliminate odors, and control fly and pest breeding conditions. It is marketed for use around animals, plants, and aquatic environments, targeting odor sources such as pet cages, chicken coops, pig pens, and horse stalls.

1 investor

Cavitel is a Polish manufacturer of specialized polymer compounds and materials for the plastics processing industry, producing injection compounds, chalk fillers for films, and various processing additives. The company focuses on reducing plastic waste, particularly from fishing nets, and developing environmentally sustainable polymer solutions.

1 investor

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.

1 investor

CelluComp manufactures Curran, a patented bio-based platform derived from cellulose nanofibres extracted from vegetable waste, used to add strength and barrier properties to pulp and other materials as a replacement for plastics and PFAS. Its primary application is fibre-based barrier packaging for food, personal care, and home care products, with additional uses in industrial materials, paints and coatings.

1 investor

CertiDeal sells refurbished iPhones and smartphones that are inspected, tested, and reconditioned in-house in France, with a 30-month warranty and pricing 30-70% below new devices. It targets consumers seeking cheaper, verified secondhand smartphones and provides a buying guide and advice hub.

1 investor

Constantia Flexibles manufactures tailor-made flexible packaging for consumer goods and pharmaceutical markets, with a focus on Design for Recycling principles and recyclable packaging solutions through its Ecolutions portfolio. The company serves brand and product manufacturers globally.

1 investor

Chako is a Zanzibar-based workshop where local artisans turn discarded plastic, glass and other waste into handcrafted, upcycled products combined with locally sourced materials. It sells these products directly while creating jobs for marginalised communities and supporting the circular economy on the island.

1 investor

Cheeky Panda produces bamboo-based tissue products, including toilet paper, sold to households via one-off and subscription orders. The consumer brand emphasizes tree-free, plastic-free packaging and has sold over 100 million rolls.

1 investor

Smash Foods makes no-sugar-added jams and jam-based snacks such as protein bites and toasties, sweetened with dates and chia and made using upcycled "imperfect" fruit. Its products target health-conscious consumers looking for lower-sugar alternatives to conventional jams.

1 investor

Anew makes plant-based, mono-material bottles as an alternative to glass, plastic, and aluminium packaging, with a lighter weight, greater durability, and lower carbon footprint. The bottles avoid the plastic linings used in aluminium containers.

1 investor

ChopValue manufactures furniture, wall features, and signage from a densified composite material made by compressing recycled chopsticks, produced locally through a network of microfactories. It offers standard and custom business solutions for companies seeking to meet sustainability goals.

1 investor

ChopValue manufactures furniture, wall features, and signage from a densified composite material made by compressing recycled chopsticks, offering standard and custom solutions for businesses. It operates a network of local microfactories to produce and distribute products close to customers, positioning itself in the circular economy and sustainable materials space.

1 investor

ChoViva makes a cocoa-free chocolate alternative produced from ground sunflower seeds that looks and tastes like chocolate. It is offered as a compound ingredient for food manufacturers, positioned as a lower-emission and more sustainable substitute for conventional chocolate.

1 investor

Christy Dawn is a clothing brand that designs and sells women's dresses, undergarments, and slips made through a regenerative "Farm-to-Closet" model, working with partner Oshadi Collective on regenerative cotton farming. It sells direct to consumers online and through its Los Angeles retail store.

1 investor

Cimu operates a network of vetted tailors offering on-demand clothing alteration services delivered to customers' homes in New York City. The company modernizes the traditional tailoring industry by connecting skilled artisan tailors with customers through digital infrastructure while supporting immigrant and minority-language tailors in building sustainable practices.

1 investor