New Materials Startups

Recover Energy develops technology to remediate drilling waste liabilities in the oil and gas industry. The company processes and treats waste from drilling operations to reduce environmental contamination.

1 investor

Recreus develops flexible 3D printing materials that enable manufacturers, creators, and other users to produce flexible printed parts. The company's core product, Filaflex, is a filament material designed to expand the capabilities of additive manufacturing beyond rigid materials.

1 investor

Recycled Granite recovers scrap granite and marble remnants discarded by stone fabricators and processes them into finished products for residential and commercial projects. The company serves architects, designers, builders, and do-it-yourselfers in the U.S., and runs an apprenticeship program certifying people with disabilities to work with recycled stone.

1 investor

Reda is an Italian textile group that manufactures fabrics, including wool and Merino-based and stretch-performance textiles (lines such as Reda Active and Flexo), used to make men's and women's suits and garments. It presents seasonal fabric collections aimed at the apparel and fashion industry.

1 investor

Redoxion develops advanced cathode materials for lithium iron phosphate (LFP) batteries using sustainable, locally-sourced manufacturing methods. The company serves energy storage companies and the broader clean energy sector seeking cost-effective, environmentally responsible battery components.

1 investor

REEgen uses genetically engineered bacteria to recover rare earth elements and critical metals from ores and industrial by-products such as steel slag, electronic waste, spent catalysts, and coal ash. The bioleaching process aims to provide a cleaner, circular alternative to conventional rare earth extraction and diversify a supply chain currently dominated by China.

1 investor

ReenBio is an ingredient biotechnology company that uses precision fermentation, enzymatic bioconversion and upcycled crop-residue feedstocks to produce natural ingredients that are molecularly identical to crop-derived vanilla, coffee and cocoa. It supplies drop-in replacement ingredients, recovered flavour aromatics and nutraceutical actives to food, beverage, cosmetics and healthcare manufacturers.

1 investor

Refinity develops technology to convert minimally-sorted mixed plastic waste into drop-in raw material feedstocks, aiming to replace naphtha and support a circular economy. It operates in the chemical recycling and materials sector as a member of Innventure's family of companies.

1 investor

Regenesis Materials develops advanced recycled materials for eyewear brands, using nanotechnology to combine ocean-bound plastic waste and captured CO₂ from coconut shells into net-zero materials for sports, fashion, and optical/smart frames. Its product lines include Carbonite, Oceantate, and Aerolite, and its materials can also be applied to lifestyle products, accessories, packaging, and other consumer goods.

1 investor

RE:HARVEST upcycles byproducts from food manufacturing into high-value, eco-friendly food ingredients and materials for food manufacturers and brands. The company focuses on reducing carbon emissions and addressing food resource scarcity through innovative processing of waste streams like brewery byproducts, rice drink residue, flour mill waste, and ginseng processing leftovers.

1 investor

REIN4CED develops thermoplastic composite materials and manufacturing processes with a focus on recyclability, reusing and recycling in-house waste to create new products. Its composites are used in series production for sports brands and have been demonstrated with Tier-1 aerospace suppliers.

1 investor

Release Layer develops RLS, a helmet safety technology designed to deflect rotational and concussive force from angled impacts to reduce the risk of brain injury. The technology is validated through independent drop testing that measures how well helmets deflect rotational energy in crash scenarios.

1 investor

Rematter manufactures a circular ceiling system for the construction industry, using locally available regenerative materials such as wood and clay to store CO₂ and reduce embodied emissions. Its products aim to match the technical performance of conventional concrete solutions while offering better sustainability and competitive pricing.

1 investor

Renasens develops a CO₂-based, waterless recycling technology that separates blended textile waste such as polycotton into reusable high-quality fibers for the fashion and manufacturing supply chain. The deeptech company works with research institutes, spinners, manufacturers and brands, with a focus on Europe's circular manufacturing ecosystem.

1 investor

ReNerve develops nerve repair products, including cuffs, grafts, and bionic nerve structures, to treat transected nerves and improve patient outcomes. The company operates research laboratories in Melbourne, Australia, and collaborates with researchers at the CSIRO / Monash University biomaterials precinct.

1 investor

Renewcat develops a chemical recycling technology that converts unrecyclable waste PVC into polyethylene/hydrocarbon waxes and recovers chlorine for reuse in PVC production. Its waxes target industries such as construction, PVC manufacturing, and household use.

1 investor

RenewCO₂ develops an electrocatalytic carbon utilization technology (eCUT) that converts waste CO₂ from industrial emissions into chemicals and fuels using only water and electricity and a patented catalyst. The technology targets the chemicals and fuels sector, aiming to produce carbon-negative feedstocks that integrate into existing industrial processes.

1 investor

Renggli is a timber construction company and general contractor building energy-efficient wooden structures for architecture firms, investors, and private clients. With over a century of experience, it also co-owns timpla, which operates a timber modular construction facility in Germany.

1 investor

RenovoDerm is a life sciences company developing wound care and tissue technology platforms within the medtech and biotech sectors. It operates as a commercial subsidiary of Paragen Technologies.

1 investor

Resilco operates a circular process that recovers and valorizes hazardous industrial waste — such as fly ash from waste-to-energy plants and slag from steel manufacturing — into secondary raw materials for sectors like construction and road building. Its technology also captures and permanently stores CO2 from industrial fumes inside those recovered materials, reducing landfill disposal and emissions.

1 investor

ReSiTec develops process engineering solutions and produces metal and mineral powders for industrial applications. The company serves various industries requiring custom technology, products, and equipment, with particular expertise in powder and liquid solution handling.

1 investor

ResourceCo recovers and re-manufactures primary resources, extracting value from materials that would otherwise go to landfill. It works with governments, communities, and multinational companies to advance the circular economy and preserve natural resources.

1 investor

Rester is a Finnish company that mechanically recycles end-of-life business textiles — such as workwear, uniforms, flat linen, and production side streams — into recycled fibers and raw materials. Its nonwoven, short, and spinnable fibers are sold to industrial and textile manufacturers as replacements for virgin materials.

1 investor

Return Carbon is a venture builder and investor focused on accelerating the transition to net-zero energy systems. The company works with startups and projects in the energy transition and climate sectors.

1 investor