Circular Economy Startups

Kair produces plant-based laundry care products sold direct to consumers, including clothing washes and fabric conditioners formulated without harsh chemicals.

1 investor

Kairos converts organic waste (sewage, manure, food residues) into recoverable CO2, clean water, and minerals through a self-powered thermochemical process, selling the outputs for circular use and carbon removal credits.

1 investor

Kamik is a Canadian boot maker, in operation since 1898, that produces cold- and bad-weather footwear for outdoor work and harsh conditions, serving workers such as miners, hunters, soldiers, and mail carriers as well as everyday consumers. About 70% of its boots are manufactured in Quebec, Canada, with recycling of rubber off-cuts and closed-loop cooling water in production.

1 investor

Katun supplies aftermarket products, parts, and supplies for office equipment manufacturers, including remanufactured and recycled imaging supplies. The company also provides fleet management solutions and business services focused on sustainability and operational efficiency for dealer and distributor customers.

1 investor

Kawa Project produces a cocoa powder alternative derived from processed coffee waste using food science and manufacturing techniques. The company serves the food and beverage industry seeking sustainable ingredients.

1 investor

KBV Group designs and manufactures kitchen furniture and home furnishings with emphasis on sustainability and ESG principles. The company combines design, innovation, and responsible sourcing of materials to serve residential customers.

1 investor

Keenat provides waste collection, recycling, and valorization services focused on cigarette butts, masks, disposable PPE, and chewing gum, along with sorting furniture (ashtrays, collection bins). It serves businesses, local authorities, public services, and healthcare facilities in France, working with social and solidarity economy structures for waste collection.

1 investor

SOFACOMPANY is a Danish furniture brand that designs and manufactures modern sofas, armchairs, and lounge furniture in Scandinavian style, selling directly to consumers without intermediaries. The company works with KEEPR to extend the life of returned items and discontinued designs.

1 investor

Kensing is a global manufacturer of plant-based ingredient solutions for human and animal nutrition, personal care, home care, and industrial applications. The company operates multiple manufacturing facilities across the United States, Argentina, and Spain, and has positioned itself as a leading supplier of natural vitamin E through strategic acquisitions.

1 investor

KEON develops, builds, operates, and maintains anaerobic digestion (methanization) plants that convert household and organic waste into biogas (green energy) and digestate fertilizer, including a turnkey MONO-MÉTHA offering. It also sources and secures organic waste supply for local operators, serving territorial and agricultural stakeholders in France and internationally.

1 investor

Ketjen manufactures catalysts and chemical products for refineries, petrochemical, and specialty chemicals customers globally, operating four strategic manufacturing sites worldwide.

1 investor

Key Container Corporation manufactures corrugated boxes, custom shipping containers, foam packaging, and protective materials for businesses across New England and nationwide. The company provides integrated services including design, die-cutting, printing, and on-site production with just-in-time inventory management.

1 investor

Keyes Packaging Group produces molded fiber trays and specialty-tissue protective wrap used to store and ship food and beverage products such as apples, pears, avocados, eggs, citrus fruit, and wine bottles. It serves the food and beverage industry and operates the largest molded fiber plant on the West Coast, based in Washington state.

1 investor

Keystone Rail Recovery is a railroad material supplier handling scrap, reroll, and relay rail and other track materials (OTM, tie plates, joint bars, anchors, ties, switch parts). It serves Class 1 and Short Line railroads and rail contractors across the United States, offering on-track recovery, cropping, drilling, and inventory services.

1 investor

Omega Azul (King Kampachi) farms Seriola rivoliana (Kanpachi/Kampachi) using low-density open-ocean aquaculture in the Sea of Cortez off La Paz, Baja California Sur, Mexico, and supplies the fish to chefs. The company emphasizes sustainable aquaculture practices and fish welfare.

1 investor

King Louie is a women's clothing brand offering dresses, skirts, tops, blouses, sweaters, and other apparel made from sustainable materials including organic cotton, ECOVERO viscose, and recycled polyester. The company emphasizes flattering fits, vintage-inspired prints, and colorful designs with a focus on environmental responsibility.

1 investor

Kinotech develops an alkaline leaching and electrolysis process to recover high-purity zinc metal from electric furnace dust, a byproduct of steel scrap processing, enabling resource recycling with significantly lower carbon emissions than conventional methods. The technology targets steel recycling operators and metal manufacturers seeking sustainable zinc recovery solutions.

1 investor

Kintra develops bio-based, compostable synthetic fibers and resins as an alternative to conventional petroleum-based textiles, aimed at reducing pollution in the apparel supply chain. The company produces yarn and fabric materials for fashion and apparel manufacturers.

1 investor

Kipster operates poultry farms designed around the natural behavior of hens, keeping them in spacious indoor and outdoor environments and feeding them by-products from agriculture and food surplus to reduce land and water use. The company focuses on animal welfare, carbon-neutral operations, and circularity in food production, with operations in the Netherlands and the USA.

1 investor

Kitar is an online store selling refurbished, second-hand original iPhones with permanent IMEI registration, a one-year warranty, and a 7-day no-reason return policy. It serves consumers in Indonesia looking to buy used smartphones.

1 investor

Materially Kiwi transforms surplus kiwifruit into a plastic-free, vegan leather-like textile material that is water-resistant and non-toxic. The company serves fashion and design brands seeking sustainable, bio-based alternatives to petroleum-based materials.

1 investor

Knihobot is an online marketplace where people sell and buy used books, handling the resale of pre-read books and notifying users when specific titles, authors, or editions become available. It operates in the Czech market.

1 investor

Koala.eco sells plant-based home cleaning products made with essential oils, including laundry wash, dish soap, and multi-purpose cleaners for consumers. Its products are packaged in recyclable, refillable bottles made from post-consumer recycled materials.

1 investor

Koh sells non-toxic, multipurpose home cleaning products, including a universal cleaner, reusable cloths, and a spray mop, designed to replace many single-use cleaning products. It uses a buy-once, refill-forever model aimed at consumers seeking low-waste household cleaning.

1 investor