C
CleanFiber
Makes high performance building insulation from recycled corrugated cardboard
About CleanFiber
CleanFiber is an innovative startup that specializes in producing high-quality cellulose insulation. The company was founded by experienced cellulose installers in Maine who identified a growing problem: the dwindling supply of newsprint, which is traditionally used to make cellulose insulation. To address this issue, CleanFiber has developed a unique process that repurposes cardboard boxes, a resource that is increasingly abundant due to the rise of e-commerce.
CleanFiber operates in the building materials market, specifically targeting the insulation segment. Their primary clients include contractors, builders, and homeowners who are looking for effective and sustainable insulation solutions. The company’s product is particularly attractive to those who prioritize eco-friendly building practices and high-performance materials.
The business model of CleanFiber revolves around manufacturing and selling cellulose insulation. They have invested heavily in a state-of-the-art production facility in Buffalo, which is capable of producing 3 million bags of insulation annually. This facility ensures that the company can meet the growing demand for their product while maintaining high standards of quality and consistency.
CleanFiber makes money by selling its insulation directly to contractors and builders, as well as through distribution channels that reach homeowners. Their product is competitively priced and offers several advantages over traditional cellulose insulation, such as better consistency, fewer contaminants, and enhanced fire resistance. These features make CleanFiber’s insulation a compelling choice for clients who want reliable and safe insulation for their buildings.
In summary, CleanFiber is a forward-thinking company that has turned a potential supply chain issue into a business opportunity. By leveraging the increasing availability of cardboard boxes, they have created a sustainable and high-quality insulation product that meets the needs of modern builders and homeowners.
Source: Dealroom company dataAt a glance
- Status
- Operational
- Founded
- 2013
- Headquarters
- Buffalo, United States
- Employees
- 54
- Open positions
- None listed
- Dealroom signal
- 63.7/100
- Industry
- Real Estate, Energy
- Sub-industry
- Waste Solution, Construction
- Sector
- Energy, Social Entrepreneurship, Insulation Solutions, Sustainable Development Goals, Urban Tech, Advanced Materials, Climate Tech, Green Buildings, Circular Economy, Sustainable Building Construction
- Business model
- Manufacturing
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES COther financing | Sep 2025 | $40M | $160M | AXA Investment Managers · Beacon Venture Partners · Ahlström Invest | — |
| GRANTOther financing | Oct 2024 | $20M | — | US Department of Education | ↗ |
Growth signals
Latest recorded traffic for CleanFiber is 3.2K monthly website visits, up 88.2% over the last three months. CleanFiber's team declined 10% over the past year.
Similar companies
Company identity and context are open; selected comparison metrics preview what is available on the platform.
Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed10 investors entered at this stage
Rochester Angel Network
NXT Ventures
Walnut Venture Associates
Boston Harbor Angels
Clean Energy Venture Group
Massachusetts Clean Energy Center
US National Science Foundation
43North
Buffalo Angels
US Department of Education
Series A11 investors entered at this stage
SustainVC
Closed Loop Partners
Western New York Impact Investment Fund
NOCO Energy
Jeff Wilke
Aligned Climate Capital
AXA Investment Managers
Spring Lane Capital
Global Brain Corporation
Climate Innovation Capital- TCTokyu Construction
Series B and later3 investors entered at this stage
- LALapis Advisers
- BPBeacon Venture Partners
Ahlström Invest
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about CleanFiber on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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