[ { "id": 601, "name": "MadeSolid", "slug": "madesolid", "former_names": [], "small_logo_thumb_url": "/company/thumb/missing.png", "website": "http://madesolid.com", "all_locations": "Emeryville, CA, USA", "long_description": "MadeSolid is a hardware company that develops high-quality materials with 3D printing applications. With a team of experienced chemists and engineers, the MadeSolid develops functional materials for 3D Manufacturing real products. MadeSolid is based in Emeryville, California.", "one_liner": "Functional 3D printing materials.", "team_size": 2, "industry": "Industrials", "subindustry": "Industrials -> Manufacturing and Robotics", "launched_at": 1384978803, "tags": [ "3D Printing", "Advanced Materials" ], "tags_highlighted": [], "top_company": false, "isHiring": false, "nonprofit": false, "batch": "Winter 2014", "status": "Inactive", "industries": [ "Industrials", "Manufacturing and Robotics" ], "regions": [ "United States of America", "America / Canada" ], "stage": "Early", "app_video_public": false, "demo_day_video_public": false, "app_answers": null, "question_answers": false, "url": "https://www.ycombinator.com/companies/madesolid", "api": "https://yc-oss.github.io/api/batches/winter-2014/madesolid.json" }, { "id": 691, "name": "Alchemy", "slug": "alchemy", "former_names": [ "Neverfrost" ], "small_logo_thumb_url": "https://bookface-images.s3.amazonaws.com/small_logos/ee0b471ed87568bd4c184883741ed9b8cb5f06ee.png", "website": "http://www.alchemynano.com", "all_locations": "Waterloo, ON, Canada", "long_description": "Alchemy is a nanotechnology company based in Kitchener, Ontario with core operations in the automotive and defense sectors. \r\n\r\nAutomotive - With the widespread adoption of ADAS systems in new vehicles, the cost of replacing a windshield in new vehicles has tripled to $1500+. We have developed a windshield protection film product line called ExoShield to help vehicle owners protect their windshields. Our ExoShield GT3 film is sold through 400+ aftermarket installers and car dealerships in 56 countries that carry and install it for vehicle owners. For Jeep Wrangler and Ford Bronco owners (google: broken windshield club), our ExoShield ULTRA DIY kits are available via our website and dropshipping partners. \r\n\r\nDefense - Over the last 3 years, we have been working with the Canadian Armed Forces to develop an infrared camouflage technology. We have received two contracts from CAF to develop our technology. Our solution has the ability to be integrated into the uniform directly (adding just 5-10g of weight vs. 600-18,000 kg of weight for other alternatives), has outperformed all existing NATO alternatives in multiple CAF field trials, and is receiving support from major elements of CAF for our next contract. This technology can also be adapted for other individual camouflage integrations (face paint and individual nettings) and for mobile camouflage applications (vehicle nettings and vehicle paints). ", "one_liner": "Nanotechnology-enabled coatings for automotive and defence sectors", "team_size": 25, "industry": "Industrials", "subindustry": "Industrials -> Manufacturing and Robotics", "launched_at": 1398907896, "tags": [ "Advanced Materials", "Defense", "Automotive" ], "tags_highlighted": [], "top_company": false, "isHiring": false, "nonprofit": false, "batch": "Summer 2014", "status": "Active", "industries": [ "Industrials", "Manufacturing and Robotics" ], "regions": [ "Canada", "America / Canada", "Remote", "Partly Remote" ], "stage": "Early", "app_video_public": false, "demo_day_video_public": false, "app_answers": null, "question_answers": false, "url": "https://www.ycombinator.com/companies/alchemy", "api": "https://yc-oss.github.io/api/batches/summer-2014/alchemy.json" }, { "id": 12096, "name": "Maple Materials", "slug": "maple-materials", "former_names": [ "Saratoga Energy Research Partners", "LLC", "Saratoga Energy", "Maple Materials (fka Saratoga Energy)" ], "small_logo_thumb_url": "https://bookface-images.s3.amazonaws.com/small_logos/a3822ef4eba7294b4ec36e7ecdbc27b2475f2b17.png", "website": "http://maplematerials.com", "all_locations": "San Francisco, CA, USA", "long_description": "Maple Materials, Inc. (Richmond, California) develops a low-cost electrolysis process to split carbon dioxide into graphite and oxygen. Due to several unique features of our production process and product, we have potential to produce battery-grade graphite anode material one-third the cost of current graphite anode materials. When powered by renewables, this process has the potential to be carbon negative.", "one_liner": "We turn CO2 into battery-grade graphite and oxygen.", "team_size": 6, "industry": "Industrials", "subindustry": "Industrials -> Climate", "launched_at": 1541721764, "tags": [ "Advanced Materials" ], "tags_highlighted": [], "top_company": false, "isHiring": false, "nonprofit": false, "batch": "Winter 2019", "status": "Active", "industries": [ "Industrials", "Climate" ], "regions": [ "United States of America", "America / Canada", "Remote", "Partly Remote" ], "stage": "Early", "app_video_public": false, "demo_day_video_public": false, "app_answers": null, "question_answers": false, "url": "https://www.ycombinator.com/companies/maple-materials", "api": "https://yc-oss.github.io/api/batches/winter-2019/maple-materials.json" }, { "id": 12666, "name": "spotLESS Materials", "slug": "spotless-materials", "former_names": [], "small_logo_thumb_url": "https://bookface-images.s3.amazonaws.com/small_logos/f4bcbe21be5fc35568846a259c348e3973168839.png", "website": "https://www.industry.spotlessmaterials.com", "all_locations": "State College, PA, USA", "long_description": "Surface fouling is a costly challenge across industries, impacting medical consumables, diagnostic devices, and automotive components. Contamination from substances like mud, ice, and sludge can compromise performance and lead to frequent cleaning, repairs, and replacements.\r\n\r\nOur PFAS-free coating, which we first launched as a consumer product, has quickly expanded into industrial partnerships. It dramatically reduces contamination on critical surfaces such as glass, metal, ceramic, and now plastics too. Whether for medical devices or automotive components, our coating protects against surface fouling\r\nCurrently our coatings work best on glass, metal, and ceramic surfaces. ", "one_liner": "Repellent coatings without PFAS", "team_size": 6, "industry": "Industrials", "subindustry": "Industrials", "launched_at": 1556766727, "tags": [ "Hard Tech", "Nanotechnology", "Advanced Materials" ], "tags_highlighted": [], "top_company": false, "isHiring": false, "nonprofit": false, "batch": "Summer 2019", "status": "Active", "industries": [ "Industrials" ], "regions": [ "United States of America", "America / Canada", "Remote", "Partly Remote" ], "stage": "Early", "app_video_public": false, "demo_day_video_public": false, "app_answers": null, "question_answers": false, "url": "https://www.ycombinator.com/companies/spotless-materials", "api": "https://yc-oss.github.io/api/batches/summer-2019/spotless-materials.json" }, { "id": 30781, "name": "Duranium", "slug": "duranium", "former_names": [], "small_logo_thumb_url": "https://bookface-images.s3.amazonaws.com/small_logos/2a84608596d6e85a1a64227a175491ef9496eb22.png", "website": "https://www.duranium.co/", "all_locations": "San Francisco, CA, USA", "long_description": "China and Russia control the world’s critical minerals. We can produce Titanium, Magnesium, Aluminum, Zirconium & Hafnium in the U.S. more profitably than any existing process, and carbon neutrally via co-production.\r\n\r\nCarbochlorination is the primary process for producing critical metals like titanium, hafnium, and zirconium, and was once the standard for magnesium. The problem: conventional carbochlorination relies on purchasing carbon feedstocks, wastes valuable byproducts, and is highly CO₂-intensive.\r\n\r\nDuranium changes this with a novel reactor that recycles CO₂ emissions back into feedstock (CO) while generating a valuable co-product (bleaching agents). This closed loop slashes emissions and delivers Chinese-level metal pricing without subsidies — unlocking the full potential of carbochlorination for U.S. critical mineral production.", "one_liner": "Reshoring critical metal production", "team_size": 10, "industry": "Industrials", "subindustry": "Industrials -> Manufacturing and Robotics", "launched_at": 1757191317, "tags": [ "Manufacturing", "Advanced Materials", "ClimateTech" ], "tags_highlighted": [], "top_company": false, "isHiring": false, "nonprofit": false, "batch": "Summer 2025", "status": "Active", "industries": [ "Industrials", "Manufacturing and Robotics" ], "regions": [ "United States of America", "America / Canada" ], "stage": "Early", "app_video_public": false, "demo_day_video_public": false, "app_answers": null, "question_answers": false, "url": "https://www.ycombinator.com/companies/duranium", "api": "https://yc-oss.github.io/api/batches/summer-2025/duranium.json" } ]