Circular Economy Startups

Citron Energy is a company focused on alternative fuel and waste/recycling operations, drawing on expertise in cement plant alternative fuels and solid waste processing. Its leadership backgrounds span private equity, ESG, and the development of landfill, recycling, and alternative fuel projects.

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Colgan Carp Solutions harvests invasive Asian Carp from waterways in the Mississippi River Basin and processes them into fish products for the pet, food, bait, and fertilizer industries. It works with fishermen across Illinois and Kentucky to supply minced, chunked, and specialty fish products while addressing the environmental impact of the invasive species.

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Compaction Technologies manufactures and sells compactor equipment and systems for commercial customers such as restaurants, retail, and waste management facilities. The company serves quick-service restaurants, mall operators, and other businesses requiring waste compaction and material handling solutions.

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Comstock commercializes technologies, systems and supply chains that convert waste and under-utilized natural resources into clean energy products, including recovering metals and minerals from end-of-life solar panels and producing renewable fuels from biomass. Its business lines include solar panel recycling, biomass-based renewable fuels, and strategic investments in sustainability-focused industries.

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CS Fibers manufactures recycled polyester staple fibers for automotive, home furnishings, apparel, and consumer goods applications. The company produces 40 million pounds of recycled poly staple fiber annually from its facility in Alabama.

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Danimer Scientific develops biodegradable and compostable materials used in everyday products such as packaging and straws. The company holds a large patent portfolio and focuses on sustainable, circular-economy alternatives to conventional materials.

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DeliverZero operates a returnable, reusable packaging system aimed at making reuse for food delivery and takeout more convenient as a sustainable alternative to single-use containers. The company is now part of Minnow Technologies and has temporarily paused operations while developing a new version of its reuse platform.

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Dizolv develops compostable biopolymer substrates that replace conventional plastics in single-use products such as stretch film, tape, labels, and packaging. The material is designed to run on existing PET and HDPE manufacturing equipment, targeting manufacturers of packaging and single-use goods.

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Dorai Home designs drying products for the home, such as dish racks and bath mats, using fast-drying, sustainable materials. The company focuses on minimal, functional home goods aimed at consumers.

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Down To Earth Distributors manufactures natural and organic fertilizers packaged in compostable cardboard boxes made from 100% recycled, unbleached cardboard. The company serves home gardeners, professional gardeners, nurseries, garden centers, small farmers, and commercial crop producers.

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EBTH (Everything But The House) is an online estate sale and consignment marketplace where homeowners, estate managers, dealers, and collectors sell pre-owned and antique goods, and shoppers browse and bid on secondhand items often starting at $1. It combines self-service technology with a full-service consignment approach for selling the contents of a home.

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EcoEnclose develops and sells sustainable shipping and packaging products, focusing on materials circularity and regenerative materials, and advises brands on packaging sustainability. It serves eCommerce brands seeking eco-friendly packaging solutions.

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Ensyn operates rapid thermal processing (RTP) technology that converts wood residues into biocrude for food ingredient production. The company designs, engineers, and maintains RTP plants licensed to Kerry Group for commercial operation.

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EnviroKure develops liquid biostimulant products derived from chicken manure to improve soil and plant health for agricultural use. The company patents and commercializes this technology and is building a production facility in Hicksville, Ohio.

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Epsilyte manufactures expandable polystyrene (EPS) materials used in insulation, protective and food packaging, safety products, and specialty molded applications across construction, foodservice, and industrial markets. The company serves customers in over 30 countries and emphasizes recycled-content and biodegradable EPS solutions.

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Folia Materials makes recyclable, paper-based packaging using a patented aqueous coating process that bonds metal nanoparticles to paper cellulose fibers, including a 100% paper microwave susceptor that converts microwave energy into heat. It sells its coating technology to food companies and packaging OEMs, and through its Folia Water subsidiary produces low-cost paper water filters for underserved communities.

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Fōmcore manufactures soft seating furniture designed for common areas and shared spaces, offering lightweight yet durable pieces with easy-to-clean materials for high-traffic environments.

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FOOP Garden is a certified-organic, general-purpose liquid plant food infused with soil-enriching microbes for use on vegetables, herbs, flowers, trees, shrubs, and houseplants. It is sold to home gardeners as well as commercial farms and garden-center retailers, and is made in the USA from ingredients such as fish emulsion, kelp, volcanic ash, and mycorrhizal fungi.

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Fresh Vintage Miami is an online furniture store selling restored antique and vintage furniture and fine art pieces made from discarded and reclaimed objects for homes and workspaces. Based in Miami, it sources and reimagines salvaged furniture to keep it out of landfills.

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The Good Charcoal produces 100% chemical-free hardwood lump charcoal made from invasive acacia sourced in Namibia and Southern Africa. The company combines premium grilling fuel with environmental restoration and food insecurity relief in the United States.

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Green Bay Packaging produces retail-ready packaging solutions that combine structural design and print graphics to protect and promote products from transit to store shelf. The company serves retailers and consumer brands in the packaging industry with a focus on sustainability.

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Green Dot Bioplastics is a bioscience company that develops and produces biobased, compostable, and recyclable plastics, including its Terratek line of bioplastics. It offers product development and materials expertise to companies making sustainable products.

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Heartwood processes forest waste materials including scrap, thinning, and wildfire mitigation debris into kiln-dried firewood, trellis poles, wood chips, and engineered mulch products. The company serves forestry, agriculture, construction, and land restoration markets while supporting rural employment and forest preservation.

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Heritage Global Inc. provides valuation and lending services through its divisions including Heritage Global Valuations and Heritage Global Capital, which operate specialized units like the National Loan Exchange and a specialty lending division.

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