Venture-Backed Startups

CST株式会社 (CST Corporation) manufactures large and small mask blanks for flat panel displays (FPD/FMM), semiconductors, and packaging, along with thin-film products, handling jigs, and substrate cases. The company serves the display and semiconductor manufacturing industry from its plants in Japan.

1 investor

Clean Valley develops modular biofilter and hatchery systems for land-based aquaculture, aimed at improving production, sustainability, and community impact for farmers. Its offerings support oyster hatcheries and eco-friendly farming practices.

1 investor

0 investors

0 investors

Clean Crop develops plasma-based seed treatment technology and hardware systems for treating seeds and food surfaces in the agriculture sector. It serves grain, nut, horticulture, and agro-input markets through R&D and commercial pilot operations.

9 investors

0 investors

CleanAir.ai makes HVAC air filters designed to capture dust, pollen, and dander while maintaining airflow, offering HEPA-like filtration for residential heating and cooling systems. The product works in standard home HVAC systems and reduces how often filters need replacing.

1 investor

0 investors

Cleanaway is an Australian waste management and resource recovery company that provides collection, recycling, treatment and disposal services for a range of waste streams. It serves businesses, municipal councils, SMEs and national organisations, supporting a transition to a circular economy.

1 investor

CleanBay Renewables develops modular bio-refineries that use anaerobic digestion and nutrient recovery to convert poultry litter into renewable natural gas and controlled-release fertilizer. It serves U.S. farmers and food processing operations seeking sustainable waste management, while supplying renewable energy and carbon credits to communities and businesses.

0 investors

CleanBoss sells non-toxic household and personal cleaning products, including a wrinkle release spray, laundry detergent smart sheets, and a produce/food cleaner, marketed directly to consumers across the United States. The products are positioned as effective alternatives to conventional cleaning chemicals with no toxic warnings.

0 investors

PickNik Robotics develops MoveIt Pro, a software platform for building robotic manipulation applications with ML vision, motion planning, and grasping, supporting arbitrary hardware via ROS and extensible APIs. It serves robotics teams building production-grade manipulation and Physical AI systems, including industrial, humanoid, and space robotics applications.

0 investors

Cleanbox Technology makes UVC LED decontamination hardware to clean and sanitize wearable devices such as virtual and augmented reality (XR) headsets and other hard-to-clean surfaces. Its patented products serve businesses and government organizations seeking hygiene solutions against surface contagions.

0 investors

0 investors

CleanCapital develops, constructs, owns, operates, and invests in small-scale solar and energy storage projects for businesses, schools, non-profits, and communities. Founded in 2015, it operates one of the largest U.S. portfolios of distributed solar projects, serving customers across 30 states and U.S. territories.

0 investors

0 investors

CleanCapture develops direct air capture technology that removes carbon from the air using renewable power, without water or secondary emissions, for either utilization or permanent storage. Its patented adsorbent-based system uses a solid sorbent with a plate and heat exchanger design.

1 investor

Clean Chemistry develops oxidation-based water treatment chemistries for microbial control, water clarification, recycling and disposal across industries including energy, pulp and paper, food and beverage, and cooling towers. Its products aim to reduce fresh water use, remove contaminants, and lower operating costs compared to traditional oxidizers.

1 investor

The page hosts a Vietnamese-language free online movie streaming site called Motchill, offering series, films, and theatrical releases with Vietnamese subtitles and dubbing.

1 investor

CleanCore Solutions makes EPA-recognized cleaning devices that use Aqueous Ozone—tap water combined with dissolved ozone gas—to clean, deodorize, and sanitize surfaces without chemicals. Its products target the janitorial and cleaning industry, including sanitization, ice making, and laundry applications.

0 investors

Clean Energy Credit Union is a member-owned, online-only credit union that offers savings accounts, rewards checking, and certificates alongside financing for solar systems, electric vehicles, and green home improvements. It serves individuals seeking banking and clean energy loans, with all deposits used to fund clean energy loans for members.

1 investor

Clean Energy Systems (CES) develops high-pressure oxyfuel-based thermal power generation technology with integrated CO₂ capture, using its proprietary platelet burner to produce dispatchable, zero-emission, zero-NOx power from a wide range of gas streams. Its ZEUS project targets converting high-CO₂ and stranded natural gas reserves into clean power for onshore and offshore deployment.

1 investor

Based on customer reviews, the site appears to sell cleaning products and household items such as foams, powders, and bathroom accessories online. The page provides no explicit description of the company itself.

5 investors

CleanFiber manufactures cellulose-based insulation from recycled newsprint for the building materials industry. The company produces and distributes residential and commercial insulation through a production facility in Buffalo.

12 investors